Pitt | Swanson Engineering
Chen, Kevin P.
Electrical and Computer Engineering, Bioengineering Department
Chen, Kevin P.
Paul E. Lego Chair Professor
Faculty
Professor
Office: 1225 Benedum Hall
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Dr. Kevin P. Chen is Paul E. Lego Professor in Electrical Engineering and (with second appointment with Bio-engineering). He joined the University of Pittsburgh after completing his Ph.D. training from the University of Toronto in 2002. In Pittsburgh, Dr. Chen's group performs interdisciplinary photonics research in laser photonics, 3D lightwave circuits, advanced manufacturing, fiber optics, and nuclear micro-engineering. Research in Dr. Chen's group are supported by over $10M dollar research funding from National Science Foundation, Department of Energy, DTRA, DARPA, AmericaMake NASA, Navy, Pennsylvanian government, and industry. Dr. Chen has published over 180 refereed technical papers in scientific journals and conferences and 6 US patents (granted or pending). He is principal investigator of 10 NSF research grants including a NSF CAREER award since 2005.

Dr. Chen's group is superiorly equipped with commercial and customer built femtosecond ultrafast lasers, -ps lasers, high-power -ns YAG lasers, and deep UV excimer lasers. Dr. Chen's group possesses complete expertise in developing field-rugged, compact, and turn-key solid state laser systems from optics design, to mechanic implementation, to electronic hardware and software developments. Our fiber optics research works are supported by in-house fiber Bragg grating fabrication facilities, fiber functional coating (chemical and bio-sensing) and metallization capabilities, and state-of-the-art fiber sensor interrogation equipment including multiple optical spectrum analyzers, distributed Rayleigh OFDR sensor interrogator, Distributed Brillouin OTDR sensor interrogators, sub-pm resolution tunable laser (C+L bands), and etc.

Research in Dr. Chen's group are also enabled by close industry collaborations from leading technology companies and national laboratories such as Corning, Westinghouse, and National Energy Technology Laboratory.

  • 1998.9-2002.8: Doctor of Philosophy , Electrical Engineering, University of Toronto, Toronto, Ontario, Canada
  • 1995.9-1998.4: Master of Science , Physics, University of British Columbia, Vancouver, British Columbia, Canada
  • 1990.9-1994.6: Bachelor of Sciences , dual majors in Control Science & Physics, Xiamen University, Xiamen, Fujian, China
  • 2012.9- 2015.8: Paul E. Lego Faculty Fellow, Swanson School of Engineering, University of Pittsburgh
  • 2004.9- 2010.8: Paul E. Lego Faculty Fellow, Swanson School of Engineering, University of Pittsburgh
  • 2007: National Science Foundation CAREER award
  • 2006, 2010, 2014: Pitt Innovator Award

Laser Manufacturing : Researchers and students in our group explore laser manufacturing research from nanoscales to macroscales. 

  • Design, fabrication, and applications of 3D transformation optical structures using tunable holographic lithography schemes and metal oxide nanomaterials.
  • Ultrafast laser matter interaction and 3D photonics structures fabrications. This research program has yielded a number of exciting outcomes including flexible lightwave circuits in glass substrates, nonlinear optical topologic insulators, all-glass all-optic MEMS structures, and 3D micro-fluidic devices.
  • Adaptive laser beam forming for laser shock peening for additive manufacturing and MEMS devices.
  • Deep UV laser fabrication of fiber optics components.

Dr. Chen's group is superiorly equipped with commercial and customer built femtosecond ultrafast lasers, -ps lasers, high-power -ns YAG lasers, and deep UV excimer lasers. Single-mode high-power cw- diode lasers and a 40-w argon ion laser are available for laser holography lithography experiments. State-of-the-art motion control systems with -nm resolutions are established for sample manipulation. Spatial light modulators for temporal pulse shaping and spatial laser beam shaping are used to study and control laser matter interaction at -fs temporal resolution and -nm spatial resolution.

Laser Photonics: Dr. Chen's group possesses complete expertise in developing field-rugged, compact, and turn-key solid state laser systems from optics design, to mechanic implementation, to electronic hardware and software development.  Supported by this capability, we work with Department of Defense to explore various laser remote sensing applications such as LIBS, LIF, CARS, and laser Raman spectroscopy.

  • Fiber Optics : Another major research thrust in Dr. Chen's group is fiber laser and fiber optics. We invent new specialty optical fibers, study new distributed fiber sensing schemes, and explore new fiber sensor applications for fossil energy, nuclear energy, and structural health monitoring. Students in our research group build new ultrafast fiber laser at 1.0, 1.5, and 1.9-m. 

Our fiber optics research works are supported by our in-house fiber Bragg grating fabrication facility, fiber functional coating (chemical and bio-sensing) and metallization capabilities (protection), and state-of-the-art fiber sensor interrogation equipment including multiple optical spectrum analyzers, distributed Rayleigh OFDR sensor interrogator, Distributed Brillouin OTDR sensor interrogators, and high resolution tunable lasers. Some recent successes in fiber optics research include probing chemical reaction in solid oxide fuel cells, mapping 3D internal strain field during hydraulic fracturing process, developing multi-functional fiber for radiation environments and their cablizations, and demonstration of flow sensors with record-high operational temperature at 750 o C .

Research in our group are also enabled by close industry collaborations from leading technology companies and national laboratories such as Corning, Westinghouse, and National Energy Technology Laboratory.   

D1: Refereed Journal Papers  

  1. S. Li, L. Liu, R. Chen, B. Nelsen, X. Huang, Y. Lu, and K. P. Chen , " Development of a compact VCSEL pumped actively Q-switched laser for laser induced breakdown spectroscopy ," Rev. Sci. Inst., submitted (2015).  
  2. S. Li, B. Nelsen, and K. P. Chen , " Development of ultra-compact solid state laser using additive manufacturing process ," Nature Method, Submitted (2015).  
  3. R. Chen, M. Zaghloul, A. Yan, S. Li, G. Lu, B.C. Ames, A. P. Bunger, M-J. Li, and K. P. Chen, " High resolution monitoring of strain fields in concretes during hydraulic fracturing processes ," Optics Express, Submitted (2015).
  4. Z. Poole, A. Yan, P. Ohodnicki, Y. Lin, and K. P. Chen , " Distributed fiber optical hydrogen sensors enabled by nano-structured TiO 2 with 1-cm spatial resolution ," Optics Express, Accepted (2015).
  5. A. Yang, R. Chen, M. Zaghloul, Z. L. Poole, P. Ohodnicki, and K. P. Chen , " Sapphire fiber optical hydrogen sensors for high-temperature environments, " IEEE Photonics Technol. Lett., vol. PP, 1-1, published online (2015).  
  6. S. Huang, M. Li, S. M. Garner, M-. J. Li, and K. P. Chen , " Flexible photonic components in glass substrates ," Optics Express, vol. 23, pp. 22532-22543 (2015).
  7. L. Liu, S. Li, X. Huang, Y. Lu, K. P. Chen , R. Pik, L. Jiang, J. F. Silvain, and Y. F. Lu, " Detection of trace level uranium and samarium in glasses by combined laser-induced breakdown spectroscopy and plasma-induced fluorescence spectroscopy ," J. Anal. At. Spectrom. Vol. 30, pp. 1128-1132 (2015).
  8. L. Liu, X. Huang, S. Li, Y. Lu, K. Chen, L. Jiang, J. Silvain, and Y. Lu, " Laser-induced breakdown spectroscopy enhanced by a micro torch ," Opt Express 23, 15047-15056 (2015).
  9. A. Yan, Z. L. Poole, R. Chen, P. W. Leu, P. Ohodnicki, and K. P. Chen, " Scalable Fabrication of Metal Oxide Functional Materials and Their Applications in High-Temperature Optical Sensing ," Journal of The Minerals, Metals & Materials Society, vol. 67, 58-67 (2015).
  10. D. George, J. Lutkenhaus, D. Lowell, M. Moazzezi, M. Adewole, U. Philipose, H. Zhang, Z. L. Poole, K. P. Chen, and Y. Lin, " Holographic fabrication of 3D photonic crystals through interference of multi-beams with 4+1, 5+1 and 6+1 configurations ," Opt. Exp., vol. 22, pp. 22421-22431 (2014).
  11. M. Li, S. Huang, Q. Q. Wang, H. Petek, and K. P. Chen , " Nonlinear optical localization in embedded chalcogenide waveguide arrays ," AIP Advanced , Vol. 4, 057120 (2014).
  12. (Invited) D. Xu, Z. Poole, Y. Lin, and K. P. Chen , " Holographic printing of 3D photonics structures: A VLSI Approach ", IEEE Nanotechnology Mag ., vol. 8, pp. 4-13 (2014).
  13. R. Chen, A. Yan, Q. Q. Wang, and K. P. Chen , " Fiber optic flow sensors for high-temperature environment operation up to 800 o C, " Opt. Lett ., vol. 39, pp. 3966-3969 (2014).
  14. B. McMillen, M. Li, S. Huang, B. Zhang, and K. P. Chen , " Ultrafast laser fabrication of Bragg waveguides in chalcogenide glasses, " Opt. Lett , vol. 39, pp. 3579-3582 (2014).
  15. L. Liu, S. Li, X. N. He, X. Huang, C. F. Zhang, L. S. Fang, K. P. Chen , Y. F. Lu, " Flame-enhanced laser-induced breakdown spectroscopy ", Optics Express22 , 7686-7694 (2014).
  16. Z. Poole, P. Ohodlucki, R. Chen, A. Yang, Y. Lin, and K. P. Chen , " Engineering metal oxide nanostructures for the fiber optic sensor platform ," Optics Express22 , 2665-2674 (2014).
  17. M. Li, S. Huang, Q. Q. Wang, H. Petek, and K. P. Chen , " Nonlinear lightwave circuits in chalcogenide glasses fabricated by ultrafast laser ," Opt. Lett . 39 , 693-696 (2014).
  18. R. Chen, A. Yan, M. Li, T. Chen, Q. Wang, J. Canning, K. Cook, and K. P. Chen , " Regenerated distributed Bragg reflector fiber lasers for high-temperature operation," Opt. Lett. 38 , 2490-2492 (2013)
  19. Q. Q. Wang, T. Chen, B. Zhang, M. Li, Y. F. Lu, and K. P. Chen , " All-fiber passively mode-locked thulium-doped fiber ring laser using optically deposited graphene saturable absorbers ," Applied Physics Letters 102, no. 13 (2013): 131117-131117.
  20. Q. Q. Wang, T. Chen, B. Zhang, M. Li, Y. F. Lu, and K. P. Chen , " All-fiber ultrafast thulium-doped fiber ring laser with dissipative soliton and noise-like output in normal dispersion by single-wall carbon nanotubes ," Applied Physics Letters 103, no. 1 (2013): 011103-011103.
  21. J. Lutkenhaus, F. A. Farro, D. George, K. Ohlinger, H. Zhang, Z. Poole, K. P. Chen, and Y. Lin, " Holographic fabrication of 3D photonic crystals using silicon based reflective optics element ," Opt. Material Exp . 2 , 1236-1241 (2012).
  22. T. Chen, Q. Wang, R. Chen, B. Zhang, Y. Lin, K. P. Chen , " Distributed liquid level sensors using self-heated optical fiber for cryogenic liquid management ," Appl. Opt ., 51 , 6282-6289 (2012).
  23. B. McMillen, B. Zhang, K. P. Chen , A. Benayas, and D. Jaque, " Ultrafast laser fabrication of low-loss waveguides in chalcogenide glass with 0.65 dB/cm loss ," Opt. Lett.37 , 1418-1420 (2012).
  24. M. Li, B. Zhang, K. P. Chen . W. Snoke, and A. P. Heberle, " Noncircular refractive index profile and breakdown of degeneracy of vertical cavity surface emitting lasers ", IEEE J. Quant. Electron. 48, 1065-1068 (2012).
  25. T. Chen, Q. Wang, B. Zhang, R. Chen, and K. P. Chen , " Distributed flow sensing using optical hot -wire grid ," Opt. Express20 , 8240-8249 (2012).
  26. T. Chen, Q. Wang, R. Chen, B. Zhang, C. Jewart, K. P. Chen , M. Maklad, and P. R. Swinehart, " Distributed high-temperature pressure sensing using air-hole microstructural fibers ," Opt. Lett.37 , 1064-1066 (2012).
  27. T. Chen, Q. Wang, R. Chen, B. Zhang, C. Jewart, K. P. Chen , M. Maklad, and P. R. Swinehart, " Distributed hydrogen sensing using in-fiber Rayleigh scattering, " Appl. Phys. Lett.100 , 191105 (2012).
  28. Q. Wang, T. Chen, B. Zhang, A. Heberle, and K. P. Chen , " All-fiber passively mode-locked thulium-doped fiber ring oscillator operated at solitary and noise-like modes ," Opt. Lett.   36, 3750-3752 (2011).
  29. T. Chen, M. Maklad, P. R. Swinehart, and K. P. Chen , " Self-heated optical fiber sensor array for cryogenic fluid level sensing ", IEEE Sensor Journal , 11, 1051-1052 (2011).
  30. T. Chen, R. Chen, P. Lu, Q. Chen, and K. P. Chen , " Tapered fiber Mach-Zehnder interferometer for simultaneous measurements of liquid level and temperature, " Electron. Lett.47 , 1093-5 (2011).
  31. T. Chen, R. Chen, C. Jewart, B. Zhang, K. Cook, J. Canning, and K. P. Chen , " Regenerated gratings in air-hole microstructured fibers for high-temperature pressure sensing ," Opt. Lett .  36, 3542-3544 (2011).
  32. C. Jewart, T. Chen, E. Lindner, J. Fiebrandt, M. Rothhardt, K. Schuster, J. Kobelke, H. Bartelt, and K. P. Chen , " Suspended-core fiber Bragg grating sensor for directional-dependent transverse stress monitoring ," Opt. Lett . 36 , 2360-2362 (2011).
  33. C. Jewart, T. Chen, E. Lindner, J. Fiebrandt, M. Rothhardt, K. Schuster, J. Kobelke, H. Bartelt, and K. P. Chen , " Bending insensitivity of fiber Bragg gratings in suspended-core optical fibers ," Opt. Lett .  36, 4491-4493 (2011).
  34. T. Chen, R. Chen, P. Lu, Q. Chen, and K. P. Chen , " Tapered fiber Mach-Zehnder interferometer for simultaneous measurement of liquid level and temperature ", Electron. Lett . 47, 1093-1095 (2011).
  35.  K. Ohlinger, H. Zhang, Y. Lin, D. Xu, and K. P. Chen , " A tunable three layer phase mask for single laser exposure 3D photonic crystal generations: bandgap simulation and holographic fabrication ," Opt. Mater. Express 1, 1034-1039 (2011).
  36. Kris Ohlinger, Y. Lin, Z. Poole, K. P. Chen , " Undistorted 3D Microstructures in SU8 Formed through Two-photon Polymerization ", AIP Advances 1, 032163 (2011).
  37. D. Xu, K. P. Chen , K. Ohlinger, and Y. Lin, " Nano-imprinting lithography of a two-layer phase mask for 3D photonic structure holographic fabrications via single exposure ," Nanotechnology, vol. 22, 035303, (2011).
  38. C. M. Jewart, S. M. Quintero, A. M. B. Braga, " Design and Optimization of a Highly-Birefringent Microstructured Photonic Crystal Fiber for Pressuring Monitoring, " Opt. Exp. , Vol. 18, pp. 25657-25664 (2010).
  39. M. P. Buric, K. P. Chen, J. Falk, and S. D. Woodruff, " Multimode metal-lined capillaries for Raman Collection and Sensing ", J. Opt. Soc. Am. B , vol. 27, pp. 2612-2619 (2010).
  40. K. Ohlinger, Y. Lin, K. Lozano, D. Xu, and K. P. Chen , " Photonic crystals with waveguide defect structures fabricated through a combination of holographic lithography and two-photon lithography ," J. Appl. Phys. , vol. 108, 073113 (2010).
  41. B. Liu, F. Yan, U. Philpose, N. P. Kherani, W. Shmayda, H. Ruda, and K. P. Chen , " Tritium powered light source based on semiconductor nanowires ,"  J. Phys. D. , vol. 43, 415502 (2010).
  42. A. Harb, F. Torres, K. Ohlinger, Y. Lin, K. Lozano, D. Xu, and K. P. Chen , " Holographically formed three-dimensional penrose-type photonic quasi-crystals with diffraction patterns similar to traditional alloy quasi-crystals ,"  Opt. Exp. , vol. 18, pp. 20512-20517 (2010)
  43. Y. Fei, L. Qian, T. Chen, D. Xu, and K. P. Chen , " Cryogenic fluid level sensors multiplexed by frequency-shifted interferometry ," Appl. Opt. , vol. 49, pp. 4898-4905 (2010).
  44. T. Chen, M. Buric, M. Maklad, P. R. Swinehart, and K. P. Chen , " Self-heated all-fiber sensing system for cryogenic environments ," Measurement Sci. and Technol. , vol. 21, 094036 (2010).
  45. C. Jewart, Q. Q. Wang, K. P. Chen , S. J. Mihailov, and J. Canning, " Fiber Bragg grating pressure sensors in two-hole fibers operating at 850 o C ",  Opt. Lett. , vol. 35, pp. 1443-1445 (2010).
  46. A. Benayas, D. Jaque, B. McMillen, K. P. Chen " Thermal stability of micro-structural and optical modifications induced in sapphire by ultrafast laser filamentation, " J. Appl. Phys. , Vol. 107, 033522 (2010).
  47. B. Liu, K. P. Chen , N. P. Kherani, S. Zukotynski, and L. Gadeken, " Power-scaling performance of three-dimensional tritium betavoltaic diode, " Appl. Phys. Lett. , Vol. 95, 233112 (2009).
  48. M. Buric, T. Chen, P. Swinehart, M. Mokhar, and K. P. Chen , " Active fiber Bragg grating hydrogen sensor using high attenuation fibers, " IEEE Photon. Technol. Lett. , Vol. 21, pp. 1594-6 (2009).
  49. A. Harb, K. Lozano, Y. Lin, D. Xu, and K. P. Chen , " Five Beam Holographic Fabrication of Three-dimensional Photonic Crystal Templates Using Phase Tunable Diffraction Optical Element, " Opt. Exp . Vol . 17, pp. 16625-16631 (2009).
  50. M. Buric, K. P. Chen , J. Falk, and S. Woodruff, " Improved sensitivity gas detection by spontaneous Raman scattering, " Apl. Opt. , Vol. 48 , pp. 4424-4429 (2009).
  51. D. Xu, K. P. Chen , A. Harb, D. Rodriguez, K. Lozano, and Y. Lin, " Phase tunable holographic fabrication of three-dimensional photonic crystal templates by using a single optical element, " Appl. Phys. Lett. , Vol. 94, 231116 (2009).
  52. A. Benayas, D. Jaque, B. McMillen, and K. P. Chen , " High repetition rate UV ultrafast laser inscription of buried channel waveguides in sapphire: fabrication and fluorescence imaging via ruby R lines, " Opt. Exp. , vol. 17, pp. 10076-10081 (2009).
  53. B. McMillen, K. P. Chen , and D. Jaque, " Micro-structural imaging of high repetition rate ultrafast laser written LiTaO3 waveguides, " Appl. Phys. Lett. , vol. 94, paper 081106 (2009).
  54. Y. Lin, A. Harb, D. Rodriguez, K. Lozano, D. Xu, and K. P. Chen , " Holographic fabrication of photonic crystals using multi-dimensional phase mask, " J. Appl. Phys. Vol. 104, 113111 (2008).
  55. D Xu, K. P. Chen , I. Olvera, K. Ohlinger, and Y. Lin, " Holographic fabrication of diamond-like photonic crystal template using two-dimensional diffractive optical elements, " Appl. Phys. Lett. Vol. 93, 261193 (2008).
  56. H. An, S. Fleming, B. McMillen, K. P. Chen , and D. Snokes, " Thermal poling induced second-order nonlinearity in femtosecond laser modified fused silica, " Appl. Phys. Lett., Vol. 93, 061115 (2008).
  57. B. McMillen, K. P. Chen , H. An, S. Fleming, R. B. Balili, and D. Snoke, " Waveguiding and electro-optic characteristics of three-dimensional waveguides in LiTaO3 written by high-repetition rate ultrafast laser, " Appl. Phys. Lett. Vol. 93, 111106 (2008).
  58. B. Liu, K. P. Chen , N. Kherani, S. Zukotynski, and A. B. Antoniazzi, " Contact potential difference betavoltaic using scandium tritide, " Appl. Phys. Lett. , vol. 92, pp. 083511( 2008).
  59. M. Buric, K. P. Chen , J. Falk, and S. Woodruff, " Enhanced spontaneous Raman scattering and gas composition analysis using a photonic crystal fiber, " Appl. Opt. vol. 47, pp. 4255-4261(2008).
  60. B. Liu, N. P. Kherani, K. P. Chen , and S. Zukotynski, " Tritiation of semiconductor materials for micropower application ," Fusion Science and Technology Vol. 54, pp. 627-30 (2008).
  61. B. Liu, D. Alvarez-Ossa, N. P. kherani, S. Zukotynski, and K. P. Chen , " Smoke and particle detector using tritiated semiconductor foil ," Fusion Science and Technology ,  Vol. 54, pp. 631-634 (2008)
  62. A. B. Antoniazzi, C. S. Morton, K. P. Chen , and B. Liu, " High-pressure and high-temperature tritium apparatus for the exposure of semiconductor wafers ," Fusion Science and Technology , Vol. 54, pp. 635-38 (2008).
  63. Y. Lin, A. Harb, D. Rodriguez, K. Lozano, D. Xu, and K. P. Chen , " Fabrication of two-layer integrated phase mask for single-beam and single-exposure fabrication of three-dimensional photonic crystal, " Opt. Exp. Vol. 16, pp. 9165-9172 (2008)
  64. N. Kherani, B. Liu, K. Virk, T. Kosteski, F. Gaspari, W. T. Shmayda, S. Zukotynski, and K. P. Chen , " Hydrogen effusion from tritiated amorphous silicon, " J. of Appl. Phys. , Vol. 103, 024906, (2008).
  65. Z. Poole, D Xu, K. P. Chen , I. Olvera, K. Ohlinger, and Y. Lin, " Holographic Fabrication of Three-Dimensional Orthorhombic and Tetragonal Photonic Crystal Templates Using a Diffractive Optical Element, " Appl. Phys. Lett., Vol. 91, 251101 (2007).
  66. B. Liu, D. Alvarez-Ossa, N. P. Kherani, S. Zukotynski, and K. P. Chen , " Gamma-free smoke and particle detector using tiritiated foils, " IEEE Sensor Journal , Vol. 7, pp. 917-8 (2007).
  67. M. Buric, M. Bhattarai, P. Swinehart, M. Mokhar, and K. P. Chen , " Active Fiber Bragg Grating Hydrogen Sesnor for All-Temperature Operation, " IEEE Photon. Technol. Lett. , Vol. 19, pp. 255-257 (2007).
  68. Y. Lin, D. Rivera, Z. Poole, and K. P. Chen , " Five-beam interference pattern controlled through phases and wavevectors for diamond-like photonic crystals, " Appl. Opt. , Vol. 35, pp. 7971-7976 (2006).
  69. B. J. Liu, K. P. Chen , N. P. Kherani, T. Kosteski, S. Costea , S. Zukotynski, and A. B. Antoniazzi, " Tritiation of amorphous and crystalline silicon using T 2 gas, " Appl. Phys. Lett. , Vol. 80, 044104  (2006).
  70. C. Jewart, K. P. Chen , B. McMillen, M. Bails, S. P. Levitan, J. Canning, and I. V. Avdeev, " Sensitivity Enhancement of fiber Bragg gratings to transverse stress using microstructure fibers,"Opt. Lett. , Vol. 31, pp. 2260-2262 (2006).
  71. M. Buric, J. Falk, K. P. Chen , L. Cashdollar, A. Elyamani, " Piezo-Electric Tunable Fiber Bragg Grating Diode Laser for Chemical Sensing Using Wavelength Modulation Spectroscopy ," Opt. Exp. , Vol. 14, pp. 2178-2183 (2006).
  72. B. J. Liu, K. P. Chen , N. P. Kherani, S. Zukotynski, and A. B. Antoniazzi, " Tritium locked in silica using 248-nm KrF laser irradiation, " Appl. Phys. Lett. Vol. 88, pp. 134101(2006).
  73. C. Jewart, B. McMillen, S. K. Cho, and K. P. Chen , " X-Probe flow sensor implemented through the use of active fiber-Bragg gratings, " Sensor and Actuator A , Vol. 127, pp. 63-68 (2006).
  74. Q. Chen, K. P. Chen , W. Xu, and S. Nikumb, " Deep ultraviolet femtosecond laser tuning of fiber Bragg gratings, " Opt. Comm. , Vol. 259, pp. 123-126 (2006).
  75. Y. Lin and K. P. Chen , " Woodpile-type photonic crystals with orthorhombic or tetragonal symmetry formed through phase mask techniques ," Opt. Exp. , Vol. 14, pp. 887-892 (2006).
  76. B. McMillen, C. Jewart, M. Buric, W. Xu, Y. Lin, and K. P. Chen , " Fiber Bragg grating vacuum sensor, " Appl. Phys. Lett. , Vol.87, 234101(2005).
  77. L. Cashdollar, and K. P. Chen , " Active Fiber Optical Flow sensor, " IEEE Sensors Journal, Vol. 5, pp. 1327-1331, (2005) .  
  78. K. P. Chen , B. McMillan, and L. Cashdollar "Self-heated fiber Bragg grating sensors," Appl. Phys. Lett ., Vol. 86, 143503 (2005) .  
  79. K. P. Chen , "(Invited) Active Fiber Optical Components Powered by In-fiber Light,"Photonics Spectra , April issue, pp. 78-90 (2005).
  80. K. P. Chen , L. Cashdollar, and W. Xu, " Controlling Fiber Bragg Grating Spectra with in-Fiber Diode Laser Light, " IEEE Photon. Technol. Lett. Vol. 16, 1897-1899 (2004).
  81. Q. Y. Chen, K. P. Chen , M. Buric, and S. Nikumb, " Trimming phase and birefringence errors with deep ultraviolet femtosecond laser in planar lightwave circuits, " IEE Electron. Lett . Vol. 40, 1179-1180 (2004).
  82. K. P. Chen and P. R. Herman, " Photosensitization of standard fibers with deep UV laser radiation, " IEEE/OSA J. of lightwave Technol. Vol. 21, 1958-1968 (2003).
  83. K. P. Chen , Peter R. Herman, and Rod Taylor " VUV laser-induced refractive index change and birefringence in standard fiber, " IEEE/OSA J. of lightwave Technol. Vol. 21, 1969-1977 (2003).
  84. K. P. Chen , P. R. Herman , and R. Taylor, " Photosensitivity and Application with 157-nm F2 Laser Radiation in Planar Lightwave Circuits, " IEEE/OSA J. of lightwave Technol. Vol. 21, 140-148  (2003).
  85. K. P. Chen and P. R. Herman, " Trimming phase and birefringence errors in photosensitivity-locked planar optical circuits, " IEEE Photon. Tech. Lett. , Vol. 14, 71-73 (2002).
  86. K. P. Chen , P. R. Herman, and R. Tam, " Strong fiber Bragg gratings fabrication by hybrid 157-nm and 248-nm laser exposure, " IEEE Photon. Technol. Lett . Vol. 14, 170-172 (2002).
  87. K. P. Chen , and P. R. Herman, " Phase error correction in planar lightwave circuit interleaver using photosensitization technique, " IEE Electron. Lett. Vol. 38, 24-26 (2002).
  88. K. P. Chen , X. L. Wei, and P. R. Herman, " Strong 157-nm F2-laser photosensitivity-locking of hydrogen-loaded telecommunication fiber for 248-nm fabrication of long-period grating ," IEE Electron. Lett . Vol. 38, 17-19 (2002).
  89. K. P. Chen and P. R. Herman, " Enhancement and tuning of fiber Bragg grating reflection by 157-nm F2 laser post exposure, " IEE Electron. Lett. Vol. 37, 822-3 (2001).
  90. K. P. Chen , P. R. Herman, J. Zhang, and R. Tam, " Fabrication of strong long-period gratings in hydrogen-free fibers with 157-nm F 2 -laser radiation," Opt. Lett. , Vol. 26, 771-773 (2001).
  91. K. P. Chen , P. R. Herman, R. Tam, J. Zhang, " Rapid long-period grating formation in hydrogen-loaded fibre with 157 nm F2-laser radiation ," IEE Electron. Lett. , Vol.36, 2000-1 (2000).
  92. M. Lapczyna, K.P. Chen , P.R. Herman, H.W. Tan, R.S. Marjoribanks, "Ultra-high repetition rate (133 MHz) laser ablation of aluminum with 1.2-ps pulses,"Appl. Phys. A ., Vol. 69 , S883-S886 (1999)
  93. P.R. Herman, K.P. Chen , P. Corkum, A. Naumov, S. Ng, J. Zhang, "Advanced lasers for photonic device microfabrication,"RIKEN Review , Vol. 32, 31-35 (2001).
  94. P.R. Herman, R.S. Marjoribanks, A. Oettl, K. P. Chen , "Laser shaping of photonic materials: deep ultraviolet and ultrafast lasers,"Appl. Surf. Sci.154-155 , 577-586 (2000).
  95. Q. Xie, P. Chen , " Semi-empirical tight-binding inter-atomic potentials based on the Hubbard model,"Physical Review B. Vol. 56, 5235 (1997).
  96. P. Chen , Q. Xie, and M. Huang, " Calculation of thermodynamic properties of silver using a lattice-inverted many-body potential ," Chin. Phys. Lett. , Vol. 12, pp. 374-377 (1995).

D2: Edited Books and Chapters  

  1. D. Xu, K. P. Chen , K. Ohlinger, and Y. Lin, " Holographic Fabrication of Three-Dimensional Woodpile-type Photonic Crystal Templates Using Phase Mask Technique, " Chapter in Recent Optical and Photonic Technologies , Ki Young Kim (Ed.), ISBN: 978-953-7619-71-8, INTECH. (2010).
  2. M. Buric, K. P. Chen , J. Falk and S. Woodruff, " Photonic-Bandgap Fiber Sensors for Gas Detection ," chapter in Trends in Photonics 2008 , John Canning (Ed.), ISBN: 978-81-7895-441-7 , Research Signpost. (2010).
  3. T. Chen, M. Buric, and K. P. Chen , " Self-Heating Fiber Bragg Grating Sensor ," chapter in Trends in Photonics 2008 , John Canning (Ed.), ISBN: 978-81-7895-441-7, Research Signpost. (2010).  

D3: Refereed Conference Papers  

  1. ( Invited ) S. Huang, Y. Huang, R. Cao, M.-J. Li, and K. P. Chen , " Multilayer optical interconnects using ultrafast laser direct written 3D waveguides and ion exchange surface waveguides ," Accepted by Proc. SPIE Photonics West, Conference on Optics Interconnect , paper 9753-15 (2016).
  2. D. George, J. Lutkenhaus, D. Lowell, U. Philipose, H. Zhang, Z. L. Poole, K. P. Chen , and Y. Lin, " Holographic fabrication of 3D photonic crystal templates with 4, 5, and 6-fold rotational symmetry using a single beam and single exposure ," Accepted by Proc. SPIE Photonics West, Conference on Optics Interconnect , paper 9759-15 (2016).
  3. L. Liu, X. Huang, S. Li, Y. Lu, J. F. Silvain, K. P. Chen , and Y. F. Lu " Enhancement of optical emission signals in laser-induced breakdown spectroscopy using micro-torches ," Accepted by Proc. SPIE Photonics West, Conference on Optics Interconnect , paper 9753-15 (2016).
  4. ( Invited ) S. Huang, M. -J. Li, and K. P. Chen , " Fiber for system-on-fiber applications ," Asia Communication and Photonics Conference, paper AM1D.2, Hong Kong, November 23 (2015).
  5. ( Invited ) M. Zaghloul, A. Yan, R. Chen, S. Huang, M. -J. Li, and K. P. Chen , " Multi-functional fiber sensors for radiation environments ," Accepted by SPIE Conference on Security and Sensing, Baltimore, MD, April 21-26 (2016). 
  6. A. Yan, M. Zaghloul, R. Chen, Z. L. Poole, P. Ohodnicki, M. Buric, and K. P. Chen , " Monitoring fuel concentration distribution in SOFC reactors with distributed fiber optic chemical sensors ," Accepted by SPIE Conference on Security and Sensing, Baltimore, MD, April 21-26 (2016).  
  7. R. Chen, M. Zaghloul, A. Yan, S. Li, G. Lu, B. C. Ames, N. Zolfagari, A. P. Bunger, M -J Li, , and K. P. Chen , " Internal 3D strain field monitoring in concretes during hydraulic fracturing processes ," Accepted by SPIE Conference on Security and Sensing, Baltimore, MD, April 21-26 (2016).
  8. S. Huang, K. P. Chen , and M. Li, " Board-Level Optical Interconnect Using Glass ," in CLEO: 2015 , OSA Technical Digest (online) (Optical Society of America, 2015), paper SW1K.5.
  9. A. Yan, R. Chen, Z. L. Poole, P. R. Ohodnicki, T. Elsmann, T. Habisreuther, M. Rothhardt, H. Bartelt, and K. P. Chen , " Fiber Optical Chemical Sensors Rated for 800 o C Operation ," in CLEO: 2015 , OSA Technical Digest (online) (Optical Society of America, 2015), paper STh4O.3.
  10. R. Chen, A. Yan, M. Zaghloul, G. Lu, A. P. Bunger, G. A. Miller, G. Cranch, and K. P. Chen , " Monitoring of Hydraulic Fracturing Using DFB Fiber Laser Acoustic Sensors ," in CLEO: 2015 , OSA Technical Digest (online) (Optical Society of America, 2015), paper STh4O.4.
  11. ( Invited ) A. Yan, M. Zaghloul, Z. L. Poole, P. Ohodnicki, M. Buric, and K. P. Chen , " Ultra-high temperature fiber optical chemical sensors based on nano-porous metal oxides ," Proc. SPIE 9461, Sensors for Extreme Harsh Environments II , paper 9491-54 (2015).
  12. Z. Poole, P. Ohodlucki, R. Chen, Y. Lin, and K. P. Chen , " 3D Sub-wavelength refractive index adjusted metal oxides for applications in optical sensing, " To appear in Proceeding of IEEE Nanotechnology Conference 2014.
  13. Z. Poole, P. Ohodlucki, M. Buric, S. Riyadh, Y. Lin, and K. P. Chen , " Block copolymer assisted refractive index engineering of metal oxide for applications in optical sensing, " Proceeding of SPIENanoScience and Engineering Conference , paper 9161 (2014)
  14. S. Huang, M. Li, S. M. Garner, M. Li, and K. P. Chen , " Ultrafast Laser Fabrication of 3D Photonic Components in Flexible Glasses ," in Optical Fiber Communication Conference , OSA Technical Digest (online) (Optical Society of America, 2014), paper M3K.4.
  15. ( Invited ) Kevin P. Chen, Sheng Huang, and Sean Garner, " Ultrafast laser fabrication of 3D photonic components in flexible glasses ," ICALEO 2013.
  16. ( Invited ) Kevin P. Chen, Mnigshan Li, and Qing Wang, " Integration of graphene with fiber optics and integrated optical devices for ultrafast photonic applications ," Proc. of SPIE, vol. 8609, paper 8609-1 (2013).
  17. Q. Q. Wang, T. Chen, M. Li, B. Zhang, Y. Lu, and K. Chen, " All-fiber Mode-locked Dissipative Thulium-doped Fiber Laser by Optically Deposited SWCNTs ," in CLEO: 2013 , OSA Technical Digest (online) (Optical Society of America, 2013), paper CM3I.7.
  18. R. Chen, A. Yan, M. Li, J. Canning, and K. Chen, " High-Temperature-Resistant Distributed Bragg Reflector Fiber Laser Based on Thermally Regenerated Gratings ," in CLEO: 2013 , OSA Technical Digest (online) (Optical Society of America, 2013), paper CM4I.7.
  19. ( Invited ) R. Chen, T. Chen, Q. Wang, C. Jewart, B. Zhang, K. Cook, J. Canning, D. Grobnic, S. J. Mihailov, and K. P. Chen, " Fiber Bragg Gratings in Air-Hole Microstructured Fibers for High-Temperature Pressure Sensing ," in Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides , OSA Technical Digest (online) (Optical Society of America, 2012), paper BTu4E.2.
  20. ( Invited ) T. Chen, K. P. Chen, Q. Wang, B. Zhang, and R. Chen, " Fiber Optic Distributed Sensing with Active Self-heating ," in Optical Sensors , OSA Technical Digest (online) (Optical Society of America, 2012), paper STu3F.2.
  21. Q. Wang, T. Chen, M. Li, B. Zhang, A. Heberle, and K. P. Chen, "Passively Q-Switched thulium-doped fiber laser by graphene saturable absorber", 17 th Optoelectronics and Communication Conference, paper 3C2-1, (2012)
  22. T. Chen, Q. Wang, R. Chen, B. Zhang, and K. Chen, " Active Distributed Sensing using Self-heated Optical Fibers ," in CLEO: Science and Innovations , OSA Technical Digest (online) (Optical Society of America, 2012), paper CM4B.2.
  23. B. McMillen,  B. Zhang, K. Chen, A. Benayas, D. Jaque, " Ultrafast laser fabrication of low-loss waveguides in chalcogenide glass with 0.65 dB/cm loss ," in CLEO:2012 - Laser Applications to Photonic Applications , OSA Technical Digest (CD) (Optical Society of America, 2012), paper JTh2A.63.
  24. T. Chen, B. McMillen, B. Zhang, Q. Wang, K. Chen, and Y. Lin, " Waveguide Saturable Absorbers in Chalcognide Glass Fabricated by Ultrafast Lasers ," in CLEO:2011 - Laser Applications to Photonic Applications , OSA Technical Digest (CD) (Optical Society of America, 2011), paper CMAA5.
  25. B. McMillen, Q. Wang, B. Zhang, T. Chen, K. Chen, A. Benayas, and D. Jaque, " Influence of Pulse Width in Ultrafast Laser Fabrication of Embedded Waveguides in Chalcognide Glasses ," in CLEO:2011 - Laser Applications to Photonic Applications , OSA Technical Digest (CD) (Optical Society of America, 2011), paper JTuI108.
  26. B. McMillen, B. Zhang, K. Chen, A. Benayas, and D. Jaque, " Double-Filament Waveguides Written in Nd:YAG Ceramic With 2-ps UV Laser Pulses ," in CLEO:2011 - Laser Applications to Photonic Applications, OSA Technical Digest (CD) (Optical Society of America, 2011), paper JTuI105.
  27. T. Chen, Q. Wang, R. Chen, B. Zhang, and K. P. Chen, " Active distributed sensing using self-heated optical fiber ," ," in CLEO:2011 - Laser Applications to Photonic Applications , OSA Technical Digest (CD) (Optical Society of America, 2011), paper CM4B2.
  28. J. Canning, E. Lindner, K. Cook, C. Chojetzki, S. Brückner, M. Becker, M. Rothhardt, H. Bartelt, and K. Chen, " Regeneration of gratings by post-H2 loading ," in Proceedings of the International Quantum Electronics Conference and Conference on Lasers and Electro-Optics Pacific Rim 2011 , (Optical Society of America, 2011), paper C619.
  29. ( Invited ) Tong Chen, Rongzhang Chen, Charles Jewart, Botao Zhang, John Canning, Kevin Cook and Kevin P. Chen, " Thermally regenerated fiber Bragg gratings in twin-air-hole microstructured fibers for high temperature pressure sensing ", Proc. SPIE 8028, 802807 (2011).
  30. Y. Lin, K. Ohlinger, H. Zhang, D. Xu, and K. P. Chen, " Simulation of photonic bandgaps in real holographically formed 3D photonic crystals and holographic fabrication ," Proc. SPIE 7946, 7946727 (2011).
  31. C. Jewart, T. Chen, and K .P. Chen, " Fiber Bragg grating transverse load sensors using suspended core fibers for directional dependent strain measurement " Proc. SPIE 7753, 775373 (2011).
  32. B. Liu, N. P. Kherani, K. P. Chen , T. Kosteski, K. Leong and S. Zukotynski, " Self-catalyzed tritium incorporation in amorphous and crystalline silicon ", Mat. Res. Soc. Proc. (2010).
  33. B. Liu, K. P. Chen , and N. P. Kherani, "Scandium tritide for micropower source applications", The 9 th international Conference on Tritium Science and Technology. (Tritium 2010), Nara, Japan, Oct. 2010.
  34. D. Xu, T. Chen, K. P. Chen , H. Wang, Y. Lu, and Y. Lin, " Laser-assisted chemical vapor deposition of silicon nano-layers in air-hole microstructured fibers ," Conference on Laser and Electro-Optics, paper JTuC5 (2010).
  35. D. Xu, K. P. Chen , A. Harb, and Y. Lin, " Development of two-layer integrated phase masks for three-dimensional photonic crystal template fabrication ," Conference on Laser and Electro-Optics, paper CFF3 (2010).
  36. M. P. Buric, K. P. Chen , J. Falk, and S. D. Woodruff, " Metal-lined capillaries for efficient Raman gas sensing ," Conference on Laser and Electro-Optics, paper CFA5 (2010).
  37. Q. Wang, T. Chen, and K. P. Chen , " Model-locked ultrafast thulium fiber laser with all-fiber dispersion management ," Conference on Laser and Electro-Optics, paper CFK7 (2010).
  38. F. Torres, Y. Lin, A. Harb, K. Ohlinger, K. Lozano, D. Xu, and K. P. Chen , " Holographic fabrication of three-dimensional Penrose-type photonic quasi-crystal using a lab-made phase mask, " Conference on Laser and Electro-Optics, paper CMBB1, (2010)
  39.  ( Invited ) C. Jewart, Q. Wang, J. Canning, S. J. Mihailov, and K. P. Chen ,  " High-temperature fiber Bragg grating sensors in microstructured fiber, " in Fiber Optic Sensors and Applications VII , edited by Alexis Mendez, Henry H. Du, Anbo Wang, Eric Udd, Stephen J. Mihailov, Proceedings of SPIE Vol. 7677 (SPIE, Bellingham, WA 2010) 76770G.
  40. ( Invited ) T. Chen, K. P. Chen , M. Maklad, R. Higgins, P. Swinehart, " Self-heated fiber Bragg grating sensors for cryogenic environments ," in Fiber Optic Sensors and Applications VII , edited by Alexis Mendez, Henry H. Du, Anbo Wang, Eric Udd, Stephen J. Mihailov, Proceedings of SPIE Vol. 7677 (SPIE, Bellingham, WA 2010) 76770F.
  41. ( Invited ) K. P. Chen , " Fabrication of three-dimensional photonic components in transparent substrates using high-repetition rate femtosecond ultrafast laser ," accepted by PICALO 2010.
  42. ( Invited ) H. An, S. Fleming, B. W. McMillen and K. P. Chen , " Second-order Optical Nonlinearity in Thermally Poled Silica Waveguides Written by Femtosecond Laser Pulses ", 1-1A2 (391), International Conference on Advanced Infocomm Technology,  July 2009, China
  43. Y. Lin, A. Harb, K. Lozano, D. Xu, and K. P. Chen, " Five-beam holographic fabrication of 3D photonic crystal templates using a single diffractive optical element, " Proceedings of SPIE , Vol. 7609, 76090S (2010).
  44. C. Jewart, K. P. Chen , I. Avdeev, A. Michie, P. Hambley, and J. Canning, " Torsion of air-hole microstructured fiber devices under large defection, " Proceedings of SPIE , Vol. 7503, 75033J (2009).
  45. T. Chen, M. Buric, D. Xu, K. P. Chen , P. R. Swinehart, and M. Maklad, " All-fiber low-temperature hydrogen sensing using a multi-functional light source ", Proceedings of SPIE , Vol. 7503, 750317 (2009).
  46. B. McMillen, K. P. Chen , D. Jaque, H. An, and S. Fleming, " Ultrafast laser fabrication of 3D waveguides in sapphire ", OECC2009, paper 515 (2009)
  47. D. Xu, K. P. Chen , A. Harb, D. Rodriguez, K. Lozano, and Y. Lin, " Phase tunable holographic lithography using a single optical element " Conference on Laser and Eletro-Optics, paper CMQQ4 (2009)
  48. D. Xu, K. P. Chen , A. Harb, D. Rodriguez, K. Lozano, and Y. Lin, " Fabrication of three-dimensional photonic crystal template using two-layer integrated phase mask " Conference on Laser and Eletro-Optics, paper JTuD25 (2009)
  49. T. Chen, M. Buric, K. P. Chen , P. R. Swinehart, M. Maklad, " Active fiber hydrogen sensor for low-temperature operation ", Conference on Laser and Eletro-Optics, paper CThE4 (2009)
  50. M. Buric, K. P. Chen , J. Falk, and S. Woodruff, " Improved Sensitivity Spontaneous Raman Scattering Multi-Gas Sensor ", Conference on Laser and Eletro-Optics, paper CThI6 (2009)
  51. B. McMillen, K. P. Chen , D. Jaque, H. An, and S. Fleming, " Second harmonic and Raman imaging of ultrafast laser written LiTaO 3 waveguides ", Conference on Laser and Eletro-Optics, paper CThP1 (2009)
  52. H. An, S. Fleming, B. McMillen, and K. P. Chen ,  " Second-order nonlinearity in thermally poled silica waveguides written by femtosecond laser pulses ", Conference on Laser and Eletro-Optics, paper CFT6 (2009)
  53. Y. Lin, A. Harb, D. Rodriguez, K. Lozano, D. Xu, and K. P. Chen , " Fabrication of two-layer diffractive optical element for single-beam and single-exposure fabrication of diamond-like photonic crystal ", Proc. SPIE, vol. 7205, 720515 (2009)
  54. M. Buric, K. P. Chen , J. Falk, L. Hornak, and S. Woodruff, "Raman Sensing of Fuel Gases Using a Reflective Coating Capillary Optical Fiber" SPIE Proc. 7316, paper 731608 (2009)
  55. M. Buric, K. P. Chen , J. Falk, S. D. Woodruff, " Biomedical Optics Photonic-Crystal-Fiber Raman Spectroscopy for Real-Time, Gas-Composition Analysis ." Laser Applications to Chemical, Security and Environmental Analysis (LACSEA) , March 17-20, 2008 paper: PDPJMA9.
  56. M. Buric, Q. Wang, J. Falk, K. P. Chen , and J. Canning, " Chemical Sensing Using a Piezo-Electric Tunable Erbium Fiber Ring Distributed Feedback lase r," Australian Conference on Optical Fibre Technology (ACOFT) , Sydney, Australia, July 2008.
  57. Y. Lin, A. Harb,  D. Rodriguez,  K. Lozano, D. Xu, and K. P. Chen , " Fabrication of two-layer integrated phase mask and single-beam, single exposure fabrication of 3D photonic crystal template using the mask ", ICALEO 2008, Temecula, CA, United States, 20-23 Oct 2008.
  58. C. Jewart, D. Xu, K. P. Chen , and J. Canning, " Structure optimization of air-hole fibers for high-sensitivity fiber Bragg grating pressure sensors ," Proceedings of SPIE Vol. 7004, 70041Z (2008).
  59. M. Buric, Q. Wang, J. Falk, K K. P. Chen , and J. Canning, " Chemical Sensing Using a Piezo-Electric Tunable Erbium Fiber Ring Distributed Feedback laser ," Australian Conference on Optical Fibre Technology (ACOFT) Sydney, Australia, July 2008.
  60. K. P. Chen , C. Jewart, M. Buric, B. McMillen, P. R. Swinehart, and M. Maklad, " Self-powered multi-functional fiber sensors ," Proceedings of SPIE Vol. 6529, 652922 (2007).
  61. Y. Lin, I. Olvera, K. Ohlinger, Z. Poole, D. Xu and K. P. Chen , " Laser Holographic Lithography for the Fabrication of 3-Dimensional Periodic Photonic Structures ", ICALEO 2007, October 29 - November 1, Orlando, FL.
  62. Baojun Liu, Nazir P. Kherani, Stefan Zukotynski, Kevin P. Chen , " On-Chip Laser-Locking of Tritium in Silica Film Using Deep UV Laser Irradiation " Conference on Lasers and Electro-optics (CLEO'06), Tech. Digest, (OSA Washington DC, 2006), paper CMP2.
  63. Kevin P. Chen , Q. Chen, M. Buric, S.Nikumb " Trimming Silica Planar Lightwave Circuits Using Deep Ultraviolet Ultrafast Lasers,"Conference on Lasers and Electro-optics (CLEO'05), Tech. Digest, (OSA Washington DC, 2005), paper CWD6.
  64. Kevin P. Chen and Luke Cashdollar, " Fiber-optical tunable filters powered by in-fiber light, " Conference on Lasers and Electro-optics (CLEO'04), Tech. Digest, (OSA Washington DC, 2002), paper CWD3.
  65. K. P. Chen, and Peter R. Herman, " Phase-error correction and birefringence control in planar lightwave circuits using photosensitivity locking ," Conference on Lasers and Electro-optics (CLEO'02), Tech. Digest, (OSA Washington DC, 2002), paper CMT1.
  66. K. P. Chen , P.R. Herman, J. Zhang, "Large photosensitivity in germanosilicate planar waveguides induced by 157-nm F 2 -laser radiation",in OSA TOPS 54 , Optical Fiber Comm. Conf., Tech. Digest, (OSA, Wash. DC, 2001) paper WDD81.
  67. K.P. Chen , P.R. Herman, R. Tam, "157-nm F 2 laser photosensitivity and photosensitization in optical fibers", OSA TOPS 61 , Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides , OSA Tech. Digest, (OSA, Washington DC, 2001), paper BThA5.
  68. K.P. Chen , P.R. Herman, R. Tam, "Fabrication of long-period fiber gratings with 157-nm F2 laser radiation", OSA TOPS 61,Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides , Tech. Digest, (OSA, Washington DC, 2001), paper BThC19.
  69. K. P. Chen , A. Oettl, P. R. Herman, R. S. Marjoribanks, "Single-pulse and pulse-train effects in ultrafast-laser micromachining of fused silica" , Conference on Lasers and Electro-optics (CLEO'98), Tech. Digest, (OSA Washington DC, 1999) paper CTHC3.
  70. K. P. Chen , P. R. Herman, D. Coric, J. Li, M. Wei "F2-laser photosensitivity applications in germanosilicate fiber and planar waveguides", in Integrated Optics: Devices, Materials, and Technologies , Yakov S. Sidorin, Ari Tervonen, Editors, Proceedings of SPIE Vol. 4640, in press (2002).
  71. M. Wei, K. P. Chen , D. Coric, P. R. Herman, J. Li, " F2-laser microfabrication of buried structures in transparent glasses ," in Photon Processing in Microelectronics and Photonics , Proceedings of SPIE Vol. 4637, in press (2002).
  72. P. R. Herman, K.P. Chen , M. Wei, J. Zhang, J. Ihlemann, D. Schäfer, G. Marowsky, P. Oesterlin, B. Burghardt, "F2-lasers: high-resolution micromachining system for shaping photonic components",in OSA TOPS 56 , Conf. on Lasers and Electro-Optics, Tech. Digest, (OSA, Washington DC, 2001), pp. 574-577.
  73. P.R. Herman, K.P. Chen , S. Ng, J. Zhang, D. Coric, P. Corkum, M. Mehendale, A. Naumov, D. Rayner, "Photosensitivity in glasses: comparing ultrafast lasers with vacuum-ultraviolet lasers",in OSA TOPS 56 , Conf. on Lasers and Electro-Optics, Tech. Digest, (OSA, Washington DC, 2001), pp. 490-491.
  74. P.R. Herman, K.P. Chen , P. Corkum, A. Naumov, S. Ng, J. Zhang, "Advanced Laser Microfabrication of Photonic Components", SPIE Proc. 4088 , 345-350 (2000).
  75. P.R. Herman, A. Oettl, K.P. Chen , R.S Marjoribanks, "Laser micromachining of 'transparent' fused silica with 1-ps pulses and pulse trains",Commercial and Biomedical Applications of Ultrafast Lasers SPIE Proc. 3616 , 148-155 (1999).
  76. D. Coric, P. R. Herman, K. P. Chen , X. L. Wei, P. Corkum, V. R. Bhardwaj, D. M. Rayner, " Contrasts in writing photonic structures with ultrafast and ultraviolet lasers ", Proceedings of SPIE, Optical Devices for Fiber Communication III , Vol. 4638,  77-84, (2002)
  77. J. Li, P. R. Herman, X. M. Wei, K. P. Chen , J. Ihlemann, G. Marowsky, P. Oesterlin, B. Burghardt, " High-resolution F 2 -laser machining of micro-optic components ", Proceedings of SPIE, Photon Processing in Microelectronics and Photonics, 228-234, (2002)
  78. P. R. Herman, D. Coric, K. P. Chen , M. Wei, P. B. Corkum, R. Bhardwaj, D. M. Rayner, " Contrasts in writing photonic structures with ultrafast and ultraviolet laser ", in Commercial and Biomedical Applications of Ultrafast and FEL Lasers , Proceedings of SPIE Vol. 4633, (2002).
  79. J. Zhang, P.R. Herman, C. Lauer, K.P. Chen , M. Wei, "157-nm laser-induced modification of fused-silica glasses",inLaser Appl. in Microelectr. and Optoelectr. Manuf. SPIE Proc. 4274 , 125-132 (2001).
  80. P.R. Herman, K.P. Chen , M. Wei, J. Zhang, J. Ihlemann, D. Schafer, G. Marowsky, P. Oesterlin, B. Burghardt, "F 2 lasers: high-resolution optical processing system for shaping photonic components",in Laser Appl. in Microelectr. & Optoelectr. Manuf. SPIE Proc. 4274 , 149-157 (2001).
  81. M. Lapczyna, K.P. Chen , P.R. Herman, H.W. Tan, R.S. Marjoribanks, "Ultra-high repetition rate (133 MHz) laser ablation of aluminum with 1.2-ps pulses",5th Conf. on Laser Ablation Goettingen, Germany, 19-23 July 1999.
  82. P. R. Herman, K. P. Chen , J. Li, M. Wei, J. Ihlemann, P. Oesterlin, and B. Burghardt, " F 2 lasers: precise shaping and trimming of photonic components " 1 st UV and Blue Lasers and their Applications, 2001 IEEE/LEOS Summer Topical Meeting , Copper Mtn, CO, July 30, 2001.
  83. P. R. Herman, K.P. Chen , Y. Kerachian, R. S. Marjoribanks, S. Ng, J. Zhang, A. Naumov, and P. Corkum, " Shaping photonics: comparing ultrafast lasers with deep-ultraviolet lasers ", 1 st ICALEO , Dearborn, MI, 2-5 Oct 2000.
  84. P. R. Herman, R. S. Marjoribanks, A. Oettl, and K. Chen , " Laser shaping of photonic materials: deep ultraviolet and ultrafast lasers", Photo-Excited Processes & Applications ", E-MRS , Strasbourg, Fr., 1-4

 D5: Patents, Inventions, and Licenses

  1. Kevin P. Chen " Active fiber optical components powered by in-fiber light " US Patent 7349600
  2. Kevin P. Chen and Michael Buric " Fiber Optical Gas Sensors " US Patent 7792392
  3. Joel Falk, Kevin P. Chen, Michael Buric, and Steven Woodruff, " Enhanced Gas Detection by Raman Scattering ", US Patent 8674306
  4. Kevin P. Chen, Zsolt Poole, Michael Buric, and Paul Ohodnicki, " Fiber optical sensor employing a metal oxide material ", US Patent pending.
  5. Kevin P. Chen, Bryan Nelsen, and Samir Saba, " Fiber optic imaging system for intravascular imaging ", US Provisional Patent filled in August 2013.
  6. Kevin P. Chen and Tatum Tarin, " Adaptive Optical Laser Beam Steering Through Endoscope for Laser Surgery in Kidney ", US Provisional Patent filled in August 2012
  7. Baojun Liu and Kevin P. Chen , "Nuclear Micro-Engineering" US patent provisional filed by University of Pittsburgh
  8. K. P. Chen, " High-density tritium locking in glass using high-pressure tritium loading in conjunction with deep UV laser radiation and rapid thermal cycling ", US patent provisional filed by University of Pittsburgh
  9. Exclusive license on " Active fiber optical sensors " issued to Lakeshore Cryogenics Inc. in 2006.5
  10. Optional Agreement for Exclusive Licensing of  " Active fiber optical sensor powered by in-fiber light for non-medical application " issued to Lakeshore Cryogenics Inc., 2004.4-2006.4
  11. Exclusive license on Fiber Optics Gas Raman Sensors" issued to Kaiser Optics Inc. in 2012.6

 

PhD in Electrical Engineering, University of Toronto, 2002

MS in Physics, University of British Columbia, 1998

BS in Control Science and Physics, Xiamen University, 1994

3D lightwave circuits in linear and nonlinear media

Compact solid state laser systems developments for laser sensing (LIBS, CARS, Raman, LIF)

Distributed fiber sensors applications in nuclear and fossil energy, industrial processes, hydraulic fracturing, and infrastructure health monitoring

Optical fiber sensing using DFB lasers, fiber Bragg grating arrays, Rayleigh OFDR, and Brillouin ODR distributed sensors

Optical MEMS and Optical Interconnects

Scalable nanomanufacturing

Sensor fused additve manufacturing

Ultrafast fiber laser at 1.0, 1.5, and 2.0 um

Ultrafast laser processing

(2015) Paul E. Lego Chair Professor.

(2011) National science Foundation CAREER Award.

(2006) Paul E. Lego Faculty Fellow.

(2006) Pitt Innovator Award (2006, 2010, 2014).

Chen, R., Zaghloul, M., Yan, A., Li, S., Lu, G., Ames, B.C., Bunger, A.P., Li, M.J., and Chen, K.P., 2015, "High resolution monitoring of strain fields in concretes during hydraulic fracturing processes," Optics Express, Manuscript submitted for publication.

Li, S., Liu, L., Chen, R., Nelsen, B., Huang, X., Lu, Y., and Chen, K.P., 2015, "Development of a compact VCSEL pumped actively Q-switched laser for laser induced breakdown spectroscopy," Review of Scientific Instruments, Manuscript submitted for publication.

Li, S., Nelsen, B., and Chen, K.P., 2015, "Development of ultra-compact solid state laser using additive manufacturing process," Nature Method, Manuscript submitted for publication.

Liu, L., Li, S., Huang, X., Lu, Y., Chen, K., Pik, R., Jiang, L., Silvain, J.F., Lu, Y., 2015, "Detection of trace-level uranium and samarium in glasses by combined laser-induced breakdown spectroscopy and plasma-induced fluorescence spectroscopy," To appear in Journal of Analytical Atomic Spectrometry, vol.30, no.5, pp. 1128-1132.

Poole, Z.L., Yan, A., Ohodnicki, P., Lin, Y., and Chen, K.P., 2015, "Distributed fiber optical hydrogen sensors enabled by nano-structured TiO2 with 1-cm spatial resolution," To appear in .

Huang, S., Li, M., Garner, S.M., Li, M., and Chen, K.P., 2015, "Flexible photonic components in glass substrates," Optics Express, vol.23, no.17, pp. 22532-22543.

Liu, L., Huang, X., Li, S., Lu, Y., Chen, K., Jiang, L., Silvain, J., Lu, Y., 2015, "Laser-induced breakdown spectroscopy enhanced by a micro torch," Optics Express, vol.23, no.11, pp. 15047-15056.

Yan, A., Chen, R., Zaghloul, M., Poole, Z., Ohodinicki, P., and Chen, K.P., 2015, "Sapphire fiber optical hydrogen sensors for high-temperature environments," Photonics Technology Letters, IEEE, no.99, pp. 1-1.

Yan, A., Poole, Z.L., Chen, R., Leu, P.W., Ohodnicki, P., and Chen, K.P., 2015, "Scalable Fabrication of Metal Oxide Functional Materials and Their Applications in High-Temperature Optical Sensing," Journal of The Minerals, Metals & Materials Society, vol.67, no.1, pp. 53-58.

Chen, R., Yan, A., Wang, Q., and Chen, K., 2014, "Fiber optic flow sensors for high-temperature environment operation up to 800oC," Optics Letters, vol.39, no.13, pp. 3966-3969.

George, D., Lutkenhaus, J., Lowell, D., Moazzezi, M., Adewole, M., Philipose, U., Zhang, H., Poole, L., Chen, K.P., and Lin, Y., 2014, "Holographic fabrication of 3D photonic crystals through interference of multi-beams with 4+1, 5+1 and 6+1 configurations," Optics Express, vol.22, no.19, pp. 22421-22431.

Li, M., Huang, S., Wang, Q., Petek, H., and Chen, K.P., 2014, "Nonlinear lightwave circuits in chalcogenide glasses fabricated by ultrafast laser," Optical Letters, vol.39, no.3, pp. 693-696.

Li, M., Huang, S., Wang, Q., Petek, H., and Chen, P., 2014, "Nonlinear optical localization in embedded chalcogenide waveguide arrays," AIP Advanced, vol.4, no.5.

Liu, L., Li, S., He, X.N., Huang, X., Zhang, C.F., Fang, L.S., and Chen, K.P., 2014, "Flame-enhanced laser-induced breakdown spectroscopy," Optical Express, vol.22, no.7, pp. 7686-7694.

McMillen, B., Li, M., Huang, S., Zhang, B., and Chen, K.P., 2014, "Ultrafast laser fabrication of Bragg waveguides in chalcogenide glasses," vol.39, no.12, pp. 3579-3582.

Poole, Z., Ohodnicki, P., Chen, R., Yan, A., Lin, Y., and Chen, P., 2014, "Engineering metal oxide nanostructures for the fiber optic sensor platform," Optics Express, vol.22, no.3, pp. 2665-2674.

Xu, D., Poole, Z., Lin, Y., and Chen, P., 2014, "Holographic printing of 3D photonics structures: A VLSI Approach," IEEE Nanotechnology Magazine, vol.8, no.3, pp. 4-13.

Chen, R., Yan, A., Li, M., Chen, T., Wang, Q., Canning, J., Cook, K., and Chen, K.P., 2013, "Regenerated distributed Bragg reflector fiber lasers for high-temperature operation," Optics Letters, vol.38, no.14, pp. 2490-2493.

Wang, Q.Q., Chen, T., Zhang, B., Li, M., Li, M., Lu, Y., and Chen, K.P., 2013, "All-fiber passively mode-locked thulium-doped fiber ring laser using optically deposited graphene saturable absorbers," Applied Physics Letters, vol.102, pp. 131117-131117.

Wang, Q.Q., Chen, T., Zhang, B., Li, M., Lu, Y.F., and Chen, K.P., 2013, "All-fiber ultrafast thulium-doped fiber ring laser with dissipative soliton and noise-like output in normal dispersion by single-wall carbon nanotubes," Applied Physics Letters, vol.103, 011103-011103..

Chen, T., Wang, Q., Chen, R., Zhang, B., Jewart, C., Chen, K.P., Maklad, M., and Swinehart, P.R., 2012, "Distributed high-temperature pressure sensing using air-hole microstructural fibers," Optics Letters, vol.27, pp. 1064-1066.

Chen, T., Wang, Q., Chen, R., Zhang, B., Jewart, C., Chen, K.P., Maklad, M., and Swinehart, P.R., 2012, "Distributed hydrogen sensing using in-fiber Rayleigh scattering," Applied Physics Letters, vol.100, p. 191105.

Chen, T., Wang, Q., Chen, R., Zhang, B., Lin, Y., and Chen, K.P., 2012, "Distributed liquid level sensors using self-heated optical fiber for cryogenic liquid management," Applied Optics, vol.51, no.26, pp. 6282-6289.

Chen, T., Wang, Q., Zhang, B., Chen, R., and Chen, K.P., 2012, "Distributed flow sensing using optical hot-wire grid," Optics Express, vol.20, pp. 8240-8249.

Li, M., Zhang, B., Chen, K.P., Snoke, W., and Heberle, A.P., 2012, "Noncircular refractive index profile and breakdown of degenceracy of vertical cavity surface emitting lasers," IEEE Journal of Quantum Electronics, vol.48, no.8, pp. 1065-1068.

Lutkenhaus, J., Farro, F.A., George, D., Ohlinger, K., Zhang, H., Poole, Z., Chen, K.P., and Lin, Y., 2012, "Holographic fabrication of 3D photonic crystals using silicon based reflective optics element," Optical Materials Express, vol.2, pp. 1236-1241.

McMillen, B., Zhang, B., Chen, K.P., Benayas, A., and Jaque, D., 2012, "Ultrafast laser fabrication of low-loss waveguides in chalcogenide glass with 0.65 dB/cm loss," Optics Letters, vol.37, no.9, pp. 1418-1420.

Chen, T., Chen, R., Jewart, C., Zhang, B., Cook, K., Canning, J., and Chen, K.P., 2011, "Regenerated gratings in air-hole microstructured fibers for high-temperature pressure sensing," Optics Letters, vol.36, pp. 3542-3544.

Chen, T., Chen, R., Lu, P., Chen, Q., and Chen, K.P., 2011, "Tapered fiber Mach-Zehnder interferometer for simultaneous measurements of liquid level and temperature," Electronics Letters, vol.47, no.19, pp. 1093-1095.

Chen, T., Maklad, M., Swinehart, P.R., and Chen, K.P., 2011, "Self-heated optical fiber sensor array for cryogenic fluid level sensing," IEEE Sensor Journal, vol.11, pp. 1051-1052.

Jewart, C., Chen, T., Lindner, E., Fiebrandt, J., Rothhardt, M., Schuster, K., Kobelke, J., Bartelt, H., and Chen, K.P., 2011, "Bending insensitivity of fiber Bragg gratings in suspended-core optical fibers," Optics Letters, vol.36, pp. 4491-4493.

Jewart, C., Chen, T., Lindner, E., Fiebrandt, J., Rothhardt, M., Schuster, K., Kobelke, J., Bartelt, H., and Chen, K.P., 2011, "Suspended-core fiber Bragg grating sensor for directional-dependent transverse stress monitoring," Optics Letters, vol.36, pp. 2360-2362.

Ohlinger, K., Lin, Y., Poole, Z., and Chen, K.P., 2011, "Undistorted 3D Microstructures in SU8 Formed through Two-photon Polymerization," AIP Advances, vol.1, p. 032163.

Ohlinger, K., Zhang, H., Lin, Y., Xu, D., and Chen, K.P., 2011, "A tunable three layer phase mask for single laser exposure 3D photonic crystal generations: bandgap simulation and holographic fabrication," Optical Materials Express, vol.1, pp. 1034-1039.

Wang, Q., Chen, T., Zhang, B., Heberle, A., and Chen, K.P., 2011, "All-fiber passively mode-locked thulium-doped fiber ring oscillator operated at solitary and noise-like modes," Optics Letters, vol.36, pp. 3750-3752.

Xu, D., Chen, K.P., Ohlinger, K., and Lin, Y., 2011, "Nano-imprinting lithography of a two-layer phase mask for 3D photonic structure holographic fabrications via single exposure," Nanotechnology, vol.22, p. 035303.

Benayas, A., Jaque, D., McMillen, B., and Chen, K.P., 2010, "Thermal stability of micro-structural and optical modifications induced in sapphire by ultrafast laser filamentation," Journal of Applied Physics, vol.107, p. 033522.

Buric, M.P., Chen, K.P., Falk, J., and Woodruff, S.D., 2010, "Multimode metal-lined capillaries for Raman Collection and Sensing," Journal of the Optical Society of America, vol.27, pp. 2612-2619.

Chen, T., Buric, M., Maklad, M., Swinehart, P.R., and Chen, K.P., 2010, "Self-heated all-fiber sensing system for cryogenic environments," Measurement Science and Technology, vol.21, no.094036.

Fei, Y., Qian, L., Chen, T., Xu, D., and Chen, K.P., 2010, "Cryogenic fluid level sensors multiplexed by frequency-shifted interferometry," Applied Optics, vol.49, pp. 4898-4905.

Harb, A., Torres, F., Ohlinger, K., Lin, Y., Lozano, K., Xu, D., and Chen, K.P., 2010, "Holographically formed three-dimensional penrose-type photonic quasi-crystals with diffraction patterns similar to traditional alloy quasi-crystals," Optics Express, vol.18, pp. 20512-20517.

Jewart, C., Wang, Q.Q., Chen, K.P., Mihailov, S.J., and Canning, J., 2010, "Fiber Bragg grating pressure sensors in two-hole fibers operating at 850oC," Optics Letters, vol.35, pp. 1443-1445.

Jewart, C.M., Quintero, S.M., Braga, A.M., and Chen, K.P., 2010, "Design and Optimization of a Highly-Birefringent Microstructured Photonic Crystal Fiber for Pressuring Monitoring," Optics Express, vol.18, pp. 25657-25664.

Liu, B., Yan, F., Philpose, U., Kherani, N.P., Shmayda, W., Ruda, H., and Chen, K.P., 2010, "Tritium powered light source based on semiconductor nanowires," Journal of Physics D: Applied Physics, vol.43, p. 415502.

Ohlinger, K., Lin, Y., Lozano, K., Xu, D., and Chen, K.P., 2010, "Photonic crystals with waveguide defect structures fabricated through a combination of holographic lithography and two-photon lithography," Journal of Applied Physics, vol.108, p. 07113.