Curriculum Vitae for Richard L

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					Curriculum Vitae for Richard L. Fork Address Optics Building 456, University of Alabama in Huntsville, TEL: 256-824-2523, FAX: (256) 824-6618, email: forkr@uah.edu, I. Education PhD Physics: Mass. Inst. of Tech. (MIT), Cambridge, Mass. 1962. Thesis title: “Role of Excited State Degeneracy in Dispersion Phenomena”. BS Physics: (summa cum laude), Principia College, Elsah, IL 1957. II. Professional Career Professor of Electrical and Computer Engineering, UAH, Huntsville, 8/1994 to present. Professor of Physics, Rensselaer Polytechnic Institute, Troy, NY 1990-1994. Member Technical Staff, AT&T Bell Labs, Holmdel, N.J. 1970-1990. Member Technical Staff, AT&T Bell Labs, Murray Hill, N.J. 1962-1970. Research Assistant, Physics Department, MIT, 1957-1962. Research Assistant, Naval Research Laboratory, Wash., D.C. Summer 1956. III. Teaching Experience at Universities Have taught physics, electrical engineering, optics, and laser-related courses for the past 15 years. Taught courses in undergraduate physics, photonics, and optics at RPI for four years. Graduated two Ph.D. students and one Masters degree student at RPI. Have taught courses in lasers, optoelectronics, electricity and magnetism, communication theory, optical communications, solid state device fundamentals, optics laboratory, probability, photonics, and senior thesis at University of Alabama in Huntsville for eleven years. Graduated three Ph.D. students at UAH including the first black PhD student in the optics program, currently supervising 4 Ph.D. students and one masters student at UAH. Currently developing new advanced optics laboratory course for undergraduate and graduate students. Have teaching evaluations consistently higher than average. IV. Service at Universities At UAH: Optical Science and Engineering Program member, Use of Human Subjects Committee, Optoelectronics Committee, Chair of Curriculum Committee, Faculty Senate, Chair of the Finance and Resource Committee for the Faculty Senate, ABET preparation committee. At RPI: Physics Department Executive Committee, Physics Department Faculty Search Committee, and Physics Colloquium chair. Faculty advisor for student chapters of the Optical Society of America (RPI) and of SPIE (UAH).

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V. Professional Activities Co-Chaired 7th Annual Ultrafast Conference in Huntsville 16-17 Jan 2004. Chair of sessions at professional meetings, such as, Optical Society of America, Physics of Quantum Electronics, Great Lakes Photonics Symposium. Average one or more invited talks at domestic and international meetings per year, give 5-10 contributed talks or briefings talks at professional meetings and NASA, DoD meetings each year. Gave invited talk at 90th birthday celebration for Nobel Laureate Willis Lamb last year. Review journal articles and proposals for publications such as Optics Express. Have served on multiple NSF, NSF-SBIR, DoD and other review panels. VI. Research at UAH Manage Laser Science and Engineering Laboratory at University of Alabama in Huntsville. Current funding is from NASA, Army Research Office, and Joint Technical Office and averages ~$200K per year. The central theme of current work is lasers for applications on Earth and in space, including counterterrorism and remote sensing. Current technical focus is on a solid state lasers designed to scale to higher power while retaining high quality optical fields, solar pumped solid state lasers and white light filament generation. Laser power beaming was demonstrated at the Maui Air Force Space Surveillance facility under support from the NASA Advanced Projects Office. Recently completed a NASA Phase II SBIR award in collaboration with Entech, Inc. for a dual use photovoltaic receiver for both solar power and laser power. Currently share an STTR award with Digital Fusion for a compact mobile white light filament based sensor. VII. Research at Rensselaer Polytechnic Institute General theme was laser based optical communications. Built and demonstrated under AFOSR support a wavelength stable erbium doped fiber laser. The laser was operated with stable supermodes. Used a fiber interferometer to stabilize the supermodes. Built and demonstrated two colliding pulse modelocked lasers coupled by a shared Kerr medium so as to synchronize, and under some circumstances, phase lock the optical fields of the pulses in the two lasers. Students built and operated a cw Ti:sapphire laser and used the laser to produce novel measurement of the interference of higher order nonlinearities in solid state materials. Students demonstrated a nonlinear loop modelocked fiber laser with (at the time) record energy 280 pJ pulses. Constructed a harmonically modelocked fiber laser. VIII. Research at AT&T Bell Laboratories Twenty seven years as a Member of Technical Staff at AT&T Bell Laboratories in the Communication Sciences Division. Efforts typically addressed the physics and engineering issues of time resolved optical phenomena using lasers with an emphasis on solid state materials and devices. Work included pioneering calculational and experimental studies of the operation of lasers in magnetic fields, invention of the

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spherical mirror scanning interferometer, invention of writing of waveguides using photoinduced refractive index changes, the first optical memories based on reversible photodimerization, a photodimer distributed feedback laser, demonstration of the first modelocked laser, invention of the colliding pulse modelocked laser that produced the first optical pulses well into the femtosecond time domain, the first femtosecond optical amplifier, gigawatt amplification of laser pulses, the first use of integrated self phase modulation, group velocity dispersion, saturable gain, and saturable absorption to produce (at that time) world record 27 fsec duration optical pulses, femtosecond white light continuum generation, ultrafast spectroscopy of the dynamics of semiconductor materials including the first study of the dynamics of quantum well materials, first measurement of velocity overshoot in semiconductors, first direct time resolved measurements of: exciton screening, band edge renormalization, and band filling. Other work included testing and demonstration of the first cw room temperature infrared lasers. Work was also done addressing microcrystals and the picosecond and femtosecond dynamics of biological materials and systems. Other work included the prediction and first demonstration of negative dispersion using prism pairs which resulted in (at the time) world record short optical pulses of 27 femtosecond duration. In general, substantial work was done in developing the technology of ultrafast lasers, laser amplifiers, and laser based ultrafast spectroscopy. The first femtosecond movie was produced and used to show quantitatively and in detail the ablation of material by intense femtosecond pulses.

VIII. Honors and Awards Fellow, American Physical Society, 1964. Fellow, Optical Society of America, 1995. Laser Focus Invention of the Year 1983 "Colliding Pulse Laser". Most cited technical paper of 1964 in any journal. (scanning interferometry). UAH Outstanding Engineering Professor, 1995. World record shortest pulse, 6 fs, from 1987 to 1997. IX. Experience with Government Organizations Summer 1956 at the Naval Research Laboratory in Washington, DC in the High Resolution Radar Group. Ten weeks at AFRL at Rome, NY on the summer visiting faculty program, 1991 working on modelocked optical fiber and solid state lasers. Ten weeks in the summer Visiting Fellow program at NASA Marshall, 1995 addressing the problem of use of optical amplifiers to optimize signal to noise ratio in coherent LADAR for wind sensing. Supervised an employee of Air and Missile Defense Command, Redstone Arsenal, Weapons Science Directorate for a one year visit at the University of Alabama in Huntsville, 1994 who worked on photonic band gap delay lines. Supervised an employee of NASA for a one-year visit at UAH working on modeling of systems for agile beam steering. Performed a contract for AFRL Rome, NY on harmonically modelocked fiber lasers as part of a small business team during 1994-5. Consulted for Space and Missile Defense (SMDC) command on Advanced Discriminating Laser

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Technology. Consulted for SMDC on laser diode technology for missile defense systems. Continuous interaction with NASA and Department of the Army on multiple research contracts over last five years or more. Worked for two years on a Joint Technical Office contract developing the concept of a solid state laser designed to remove heat from solid state gain material while avoiding thermally induced lensing and stress.

XI. Current Grants and Contracts Current grants and contracts are with NSF, ARO STTR and NASA . Details are available from the UAH Office of Sponsored Research.

XII. Patents Patent number 3,395,365 was awarded in 1962 for a light modulator. Patent number 3,496,488 was awarded in 1966 for a stabilized optical maser. Patent number 3,668,663 was awarded in 1970 for optical storage devices. Patent number 3,689,264 was awarded in 1970 for a method for increasing index of refraction in transparent bodies and its application to light guides and the like. Patent number 4,400,814 was awarded in 1981 for the colliding pulse modelocked laser. Patent number 4,727,553 was awarded in 1985 for a short pulse laser utilizing combined self phase modulation, group velocity dispersion, saturable gain, and saturable absorption. Patent number 5,751,466 was awarded in 1998 for the photonic bandgap apparatus. Patent 6,392,791 was awarded in 2002 for method for minimizing volume and/or temperature of an optical system. Patent 6,885,779 was awarded April 26, 2005 for a phase modulator with terahertz optical bandwidth. A patent application is pending for a Solid State Laser Medium and Laser Medium Heat Transfer Method Bibliography of Published Papers 1. "Negative Tensor Susceptibility in Media Exhibiting Population Inversion", R. L. Fork and C. K. N. Patel, Physical Review 129, 2577-2579 (1963). 2. "Broadband Magnetic Field Tuning of Optical Masers", R. L. Fork and C. K. N. Patel, Applied Physics Letters 2, 180-181 (1963). 3. "Dielectric Susceptibility Tensor for an Atomic Vapor" R. L. Fork, Journal of Applied Physics 35, 134-136 (1964). 4. "Dispersion in the Vicinity of an Optical Resonance", R. L. Fork and L. C. Bradley, III, Applied Optics 35, 137-142 (1964).

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5. "Population Pulsations and Lifetimes in He-Ne Lasers", R.L. Fork, L.E. Hargrove, and M. A. Pollack, Applied Physics Letters 5, 5-7 (1964). 6. "Locking of He-Ne Laser Modes Induced by Synchronous Intracavity Modulation", L. E. Hargrove, R. L. Fork, and M. A. Pollack, Applied Physics Letters 5, 4-5 (1964). 7. "Induced Atomic Cascade Processes", R. L. Fork, L. E. Hargrove, and M. A. Pollack, Physical Review Letters 12, 705-707 (1964). 8. "Magnetic Field Tuning of Gaseous Laser Oscillators", R. L. Fork and C. K. N. Patel, Proceedings of the IEEE 52, 208 (1964). 9. "A Scanning Spherical Mirror Interferometer for Spectral Analysis of Laser Radiation", R. L. Fork, D. R. Herriott, and H. Kogelnik, Applied Optics 3, 14711484 (1964). 10. "Mode Competition and Frequency Splitting in Magnetic-Field-Tuned Optical Masers", R.L. Fork and M. Sargent III, Physical Review 139, A617-A618 (1965). 11. "Mode Competition and Collision Effects in Gaseous Optical Masers", R. L. Fork and M. A. Pollack, Physical Review 139, A1408-A1414 (1965). 12. "Multiple Quantum Processes in Magnetic-Field-Tuned Optical Masers", R. L. Fork and M. Sargent III, Physics of Quantum Electronics, ed. P. L. Kelley, B. Lax, and P. E. Tannenwald (McGraw Hill, New York 1966) pp. 611-619. 13. "Hysteresis in an He-Ne Laser", R. L. Fork, W. J. Tomlinson, and L. J. Heilos, Applied Physics Letters 8, 162-163 (1966). 14. "Zeeman Effect Studies of the Water-Vapor Laser Oscillating on the 118.65 m Transition", W. J. Tomlinson, M. A. Pollack, and R. L. Fork, Applied Physics Letters 11, 150-153 (1967). 15. "Properties of Gaseous Optical Masers in Weak Axial Magnetic Fields", W. J. Tomlinson and R. L. Fork, Physical Review 164, 466-483 (1967). 16. "Theory of a Zeeman Laser I", M. Sargent III, W. E. Lamb, Jr., and R. L. Fork, Physical Review 164, 436-449 (1967). 17. "Theory of a Zeeman Laser II", M. Sargent III, W. E. Lamb, Jr., and R. L. Fork, Physical Review 164, 450-465 (1967).

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18. "Use of Nonlinear Optical Interactions to Measure Relaxation Rates of Atomic Multipole Moments", W. J. Tomlinson and R. L. Fork, Physical Review Letters 20, 647-649 (1968). 19. "Anisotropy Effects in a Zeeman Laser", W. J. Tomlinson and R. L. Fork, Physical Review 180, 628-630 (1969). 20. "Frequency Stabilization of a Gas Laser", W. J. Tomlinson and R. L. Fork, Applied Optics 8, 121-129 (1969). 21. "Effects of Combined RF and Optical Fields on a Laser Medium", R. L. Fork, A. Dienes, and J. Wilhelm Kluver, IEEE Journal of Quantum Electronics QE-5, 607616 (1969). 22. "A Photoinduced Refractive Index Increase in Poly(methylmethacrylate) and Its Applications", W. J. Tomlinson, I.P. Kaminow, E. A. Chandross, R. L. Fork, and W. T. Silfvast, Applied Physics Letters 16, 486-489 (1970). 23. "Phototropism in Phycomyces as Investigated by Focused Laser Radiation", M. L. Meistrich, R. L. Fork, and Jean Matricon, Science 169, 370 (1970). 24. "Laser Stimulation of Nerve Cells in Aplysia", Richard L. Fork, Science 171, 907908 (1971). 25. "A Photodimer Distributed Feedback Laser", R. L. Fork, K. R. German, and E. A. Chandross, Applied Physics Letters 20, 139-141 (1972). 26. "Reversible Photodimerization: a New Type of Photochromism", W. J. Tomlinson, E. A. Chandross, R. L. Fork, C. A. Pryde, and A. A. Lamola, Applied Optics 11, 533-548 (1972). 27. "Increased Resistance to Photodegradation of Rhodamine 6G in Cooled Solid Matrices", R.L. Fork and Z. Kaplan, Applied Physics Letters 20, 472-474 (1972). 28. "Unusual Luminescence from Crystals Containing Eu2+", R.L. Fork, K.R. German, and A. Kiel, Physical Review Letters 32, 781-783 (1974). 29. "Room-Temperature Operation and Threshold Temperature Dependence of LPEGrown InxGa1-xAs Homojunction Lasers", R. E. Nahory, M. A. Pollack, D. W. Taylor, and R. L. Fork, Journal of Applied Physics 46, 5280-5282 (1975). 30. "Radiationless Relaxation Processes in Azulene", C. V. Shank, E. P. Ippen, R. L. Fork, and O. Teschke, "Chemical Physics Letters 57, 433-434 (1978).

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31. "Real Time Autocorrelation Interferometer", R. L. Fork and F. A. Beisser, Applied Optics 17, 3534-3535 (1978). 32. "Picosecond Dynamics of Optically Induced Absorption in the Band Gap of As2S3", R. L. Fork, C. V. Shank, A. M. Glass, A. Migus, M. A. Bosch, and J. Shah, Physical Review Letters 43 394-398 (1979). 33. "Dynamics of Hot Carrier Cooling in Photo-Excited GaAs", R. F. Leheny, Jagdeep Shah, R. L. Fork, C. V. Shank, and A. Migus, Solid State Communications 31, 809-813 (1979). 34. "Dynamics of Photoexcited GaAs Band Edge Absorption with Subpicosecond Resolution", C. V. Shank, R. L. Fork, R. F. Leheny, and J. Shah, Physical Review Letters 42, 112-115 (1979). 35. "Unusual Emission from Microcrystals Containing Eu2+: Experiment", R. L. Fork and D. W. Taylor, Physical Review B19, 3365-3398 (1979). 36. "Picosecond Spectroscopy of Amorphous Semiconductors Using Nonlinear Techniques", R.L. Fork, C.V. Shank, A.M. Glass, A. Migus, M.A. Bosch and J. Shah, Journal of Non-Crystalline Solids 35&36, 963-968 (1980). 37. "Subpicosecond and Picosecond Studies of Electron Transfer Intermediate in Rhodopseudomonas Sphaeroides Reaction Centers", H. Dolten, C. Hoganson, M. W. Windsor, C. C. Schenk, W. W. Parson, A. Migus, R. L. Fork, and C. V. Shank, Biochemical Biophysical Acta 592, 461-477 (1980). 38. "Application of Subpicosecond Optical Techniques to Molecular Dynamics", C. V. Shank, E. P. Ippen, R. L. Fork, A. Migus, and T. Kobayashi, Philosophical Transactions of the Royal Society, London (GB) 298, 303-308 (1980). 39. "Picosecond Nonequilibrium Carrier Transport in GaAs", C. V. Shank, R. L. Fork, B. I. Greene, F. K. Reinhart, and R. A. Logan, Applied Physics Letters 38, 104-105 (1981). 40. "Generation of Optical Pulses Shorter Than 0. 1 Picoseconds by Colliding Pulse Modelocking", R. L. Fork, B. I. Greene, and C. V. Shank, Applied Physics Letters 38, 671-672 (1981). 41. "Picosecond Dynamics of Highly Excited Multiquantum Well Structures", C. V. Shank, R. L. Fork, B. I. Greene, C. Weisbuch, and A. C. Gossard, Surface Science (Netherlands) 113, 108-111 (1982).

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42. "Amplification of Subpicosecond Optical Pulses: Theory and Experiment", A. Migus, C. V. Shank, E. P. Ippen, and R. L. Fork, Journal of Quantum Electronics QE-18, 101-109 (1982). 43. "Compression of Femtosecond Optical Pulses", C. V. Shank, R. L. Fork, and R. T. Yen, Applied Physics Letters 40, 761-763 (1982). 44. "Amplification of 70 Femtosecond Optical Pulses to Gigawatt Powers", R.L. Fork, C. V. Shank, and R. T. Yen, Applied Physics Letters 41, 761-763 (1982). 45. "Picosecond Dynamics of Photoexcited Gap States in Polyacetylene", C. V. Shank, R. Yen, R. L. Fork, J. Orenstein, and G. Baker, Physical Review Letters 49, 1660-1663 (1982). 46. "Physics of Optical Switching" R. L. Fork, Physical Review A-General Physics 26, 2049-2064 (1982). 47. "Femtosecond White Light Continuum Pulses", R. L. Fork, C. V. Shank, C. Hirlimann, and R. T. Yen, Optics Letters 8, 1-3 (1983). 48. "Femtosecond Optical Pulses", R. L. Fork, C. V. Shank, R. Yen, and C. Hirlimann, IEEE Journal of Quantum Electronics 19, 500-506 (1983). 49. "Picosecond Dynamics of Hot Carrier Relaxation in Highly Excited MultiQuantum Well Structures", C. V. Shank, R. L. Fork, R. T. Yen, and J. Shah, Solid State Communications 47, 981-983 (1983). 50. "Femtosecond Optical Pulses and Technology", R. Yen, C. V. Shank, and R.L. Fork, Proceedings of the Society of Photo-Optical Instrumentation Engineers 439, 2-5 (1983). 51. "An Optical Resonator With Negative Dispersion" J. P. Gordon and R. L. Fork, Optics Letters 9, 153-155 (1984). 52. "Negative Dispersion Using Pairs of Prisms", R. L. Fork, O. E. Martinez, and J. P. Gordon, Optics Letters 9, 150-152 (1984). 53. "Negative Group Velocity Dispersion Using Refraction", O.E. Martinez, J.P. Gordon, and R.L. Fork, Journal of the Optical Society of America 1A, 1003-1006 (1984). 54. "Theory of Passively Modelocked Lasers Including Self Phase Modulation and Group Velocity Dispersion", O. E. Martinez, R. L. Fork, and J. P. Gordon, Optics Letters 9, 156-158 (1984).

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55. "Amplified Femtosecond Optical Pulses and Continuum Generation at 5-KHz Repetition Rate", W. H. Knox, M. C. Downer, R. L. Fork, and C. V. Shank, Optics Letters 9, 552-554 (1984). 56. "Femtosecond Dynamics of Resonantly Excited Excitons in Room Temperature GaAs Quantum Wells", W. H. Knox, R. L. Fork, M. C. Downer, D. A. B. Miller, D. S. Chemla, C. V. Shank, A. C. Gossard, and W. Wiegman, Physical Review Letters 54, 1306-1309 (1985). 57. "Generation of Optical Pulses as Short as 27 Femtoseconds Directly From a Laser Balancing Self Phase Modulation, Group Velocity Dispersion, Saturable Absorption, and Saturable Gain", J. A. Valdmanis, R. L. Fork, and J. P. Gordon, Optics Letters 10, 131-133 (1985). 58. "Femtosecond Spectroscopy of Nonequilibrium Carrier Distributions", R. L. Fork, Physica B&C 134, 381-388 (1985). 59. "Optical Pulse Compression to 8 Femtoseconds at a 5-KHz Repetition Rate", W. H. Knox, R. L. Fork, R. H. Stolen, M. C. Downer, C. V. Shank, and J. A. Valdmanis, Applied Physics Letters 46, 1120-1121 (1985). 60. "Theory of Passively Mode-locked Dye Lasers for the Case of a Nonlinear Complex Propagation Coefficient", O. E. Martinez, R. L. Fork, and J. P. Gordon, Journal of Optical Society of America B2, 752-760 (1985). 61. "Femtosecond Imaging of Melting and Evaporation at a Photoexcited Silicon Surface", M. C. Downer, R. L. Fork, and C. V. Shank, Journal of the Optical Society of America B2, 595-599 (1985). 62. "Optical Frequency Filter for Ultrashort Optical Pulses", R. L. Fork, Optics Letters 11, 629-631 (1986). 63. "Spectral Hole Burning in Large Molecules Probed with 10 Femtosecond Optical Pulses", C. H. B. Cruz, R. L. Fork, W. H. Knox, and C. V. Shank, Chemical Physics Letters 132, 341-344 (1986). 64. "Design Considerations for a Femtosecond Pulse Laser Balancing Self Phase Modulation, Group Velocity Dispersion, Saturable Absorption, and Saturable Gain", J. A. Valdmanis and R. L. Fork, IEEE Journal of Quantum Electronics 22, 112-118 (1986). 65. "Multipass Optical Amplifier Using a Double Confocal Resonator Geometry", R. L. Fork, F. A. Beisser, and D. K. Fork, Revue de Physique Appliquee 22, 16651671 (1987).

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66. "Compression of Optical Pulses to 6 Femtoseconds by Using Cubic Phase Compensation", R. L. Fork, C. H. B. Cruz, P. C. Becker, and C. V. Shank, Optics Letters 12, 483-485 (1987). 67. "Femtosecond Intervalley Scattering in GaAs", P. C. Becker, H. L. Fragnito, C. H. B. Cruz, J. Shah, R. L. Fork, J. E. Cunningham, J. E. Henry, and C. V. Shank, Applied Physics Letters 53, 2089-2090 (1988). 68. "Femtosecond Photon-Echoes From Band-to-Band Transitions in GaAs", P. C. Becker, H. L. Fragnito, C. H. B. Cruz, R. L. Fork, J. E. Cunningham, J. E. Henry, and C. V. Shank, Physical Review Letters 61, 1647-1649 (1988). 69. "Effect of Laser Pulse Duration on Short Wavelength Emission from Femtosecond and Picosecond Laser-Produced Plasmas", O. R. Wood, W. T. Silfvast, H. W. K. Tom, W. H. Knox, R. L. Fork, C. H. B. Cruz, M. C. Downer, and P. J. Maloney, Applied Physics Letters 53, 654-656 (1988). 70. "Optical Stark Effect in Organic Dyes Probed with Optical Pulses of 6-fs Duration", P. C. Becker, R. L. Fork, C. H. B. Cruz, J. P. Gordon, and C. V. Shank, Physical Review Letters 60, 2462-2464 (1988). 71. "Dynamics of Spectral Hole Burning", C. H. B. Cruz, J.P. Gordon, P. C. Becker, R. L. Fork, and C. V. Shank, IEEE Journal of Quantum Electronics 24, 261-266 (1988). 72. "Phase Correction of Femtosecond Optical Pulses Using a Combination of Prisms and Gratings", C. H. B. Cruz, P. C. Becker, R. L. Fork, and C. V. Shank, Optics Letters 13, 123-125 (1988). 73. "Femtosecond Photon-Echoes from Molecules in Solution", P. C. Becker, H. L. Fragnito, J. Y. Bigot, C. H. B. Cruz, R. L. Fork, and C. V. Shank, Physical Review Letters 63, 505-507 (1989). 74. "Generation of Tunable 9-Femtosecond Optical Pulses in the Near Infrared" P. C. Becker, H. L. Fragnito, R. L. Fork, F. A. Beisser, and C. V. Shank, Applied Physics Letters 54, 411-412 (1989). 75. "Amplification of Femtosecond Optical Pulses Using a Double Confocal Resonator", R. L. Fork, H. Avramopoulos, H. L. Fragnito, P. C. Becker, K. L. Schehrer, and C. Hirlimann, Optics Letters 14, 1068-1070 (1989). 76. "Derivation and Measurement of Temporal Lengthening of Femtosecond Optical Pulses Using a Four Prism Sequence", K. L. Schehrer, R. L. Fork, H. Avramopoulos, and E. S. Fry, Optics Letters 15, 550-552, (1990)

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77. "Ultrashort Light Pulses", R. L. Fork, H. Avramopoulos, and J. A. Valdmanis, American Scientist 78, 216-223 (1990). 78. "Femtosecond Technology in the '80's," R.L. Fork, Optics & Photonics News 12, 14-17 (1990). 79. "Bandwidth Limitation and Distinct Operating Regimes of Passively Modelocked Dye Lasers Using Strong Phase Shaping", H. Avramopoulos and R. L. Fork, JOSA B8, 117-122 (1991). 80. "Kerr Lens Mediated Dynamics of Two Nonlinearly Coupled Mode-locked Laser Oscillators," S. Wu. S. L. Smith, and R.L. Fork, Optics Letters 17, 276-278 (1992). 81. "Direct experimental observation of interactive third and fifth order nonlinearities in a time and space resolved four wave mixing experiment," S. Wu, X.C. Zhang, and R.L. Fork, App. Phys. Lett. 61, 919 (1992). 82. "High-power passively mode-locked Er-doped fiber laser with a nonlinear optical loop mirror," S. Wu, J. Strait and R.L. Fork, Optics Letters 18, 1444-1446 (1993). 83. “Harmonically mode-locked laser and applications,” R.L. Fork, K. Singh, J. Haus, R.K. Erdmann and S.T. Johns, SPIE Proceedings, Photonics at the Air Force Photonics Center, 2216 148-159 (1994). 84. "Robust Operation of a Dual-Core Fiber Ring Laser,'' Y. J. Oh, S. L. Doty, J. W. Haus and R. L. Fork J. Opt. Soc. Am. B12, 2502-2507 (1995). 85. "Polarization Distortion in Birefringent Optical Fibers,” J. W. Haus, J. Theimer and R. L. Fork Photonics Technology Letters 296 (1995). 86. "Soliton Interactions on Dual Core Fibers," S. L. Doty, Y. J. Oh, J. W. Haus and R. L. Fork, Phys. Rev. E 51, 709 (1995). 87. "Soliton Repulsion Logic Gate," Y. J. Oh, J. W. Haus and R. L. Fork, Opt. Letters 21, 315-317 (1996). 88. “Propagation at the Photonic Band Edge: Large Tunable Group Delay with Minimal Distortion and Loss”, M. Scalora, R. J. Flynn, S. B. Reinhardt, R. L. Fork, M. J. Bloemer, M. D. Tocci, C. M. Bowden, H. S. Ledbetter, J. M. Bendickson, J. P. Dowling, and R. P. Leavitt, Phys. Rev. E54, R1078-81 (1996). 89. “Physics of excitations of a small number of quanta in microresonators,” R.L. Fork, V.R. Riasati, D.K. Jones, M.W. Jones and D. O. Dimmock, SPIE Proceedings 2994 287-299 (1997).

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90. “Electrically Tunable Group Delays Using Quantum Wells in a Distributed Bragg Reflector,” Thomas R. Nelson, Jr., John P. Loehr, Qianghua Xie, James E. Ehret, Joseph E. Van Nostrand, Lisa Gamble, Darryl K. Jones, Spencer T. Cole, Rebecca A. Trimm, William M. Diffey, Richard L. Fork, and Andrew S. Keys, SPIE Proceedings 3714, (1999). 91. “Resonant Transmissive Modulator Construction for use in Beam Steering Array,” Andrew Keys, Richard L. Fork, Thomas R. Nelson, Jr., and John P. Loehr, SPIE Proceedings 3787, (1999). 92. Simultaneous measurement of group delay and transmission of a one-dimensional photonic crystal”, Lisa J. Gamble, William M. Diffey, Spencer T. Cole, Richard L. Fork, Thomas R. Nelson, Jr., John P. Loehr, and James E. Ehret, Optics Express 5, 267-272 (1999). 93. “Optical Amplifier for Space Applications”, Richard L. Fork, Spencer T. Cole, William M. Diffey, Lisa J. Gamble, and Andrew S. Keys. Optics Express 5, 292301 (1999). 94. A. Keyes, R.L. Fork, “Full cycle, low loss, low distortion phase modulation from multilayered dielectric stacks with terahertz optical bandwidth,” Optics Express 7, 311 – 322 (2000). 95. S. T. Cole, R.L. Fork, D. Lamb, P. Reardon, “Multi-turn all reflective optical gyroscope” Optics Express 7, 285-291 (2000). 96. M.H. Smith, R.L. Fork, S.T. Cole, “Safe Delivery of optical power from space”, Optics Express 8, 537-546 (2001). 97. Richard L. Fork, “High-energy lasers may put power in space”, Laser Focus World, 37, 113-117 (2001). 98. Richard L. Fork, Wesley W. Walker, Rustin L. Laycock, Jason J. A. Green, and Spencer T. Cole, “Integrated diamond sapphire laser”, Optics Express 11, 25322548 (2003). 99. R.L. Fork, R.L. Laycock, W.W. Walker, S.T. Cole, S.D. Moultrie, D.J. Phillips, and J.C. Reinhardt, “Surface High Energy Laser” (Invited Paper) Proc. IEEE. 93, 1864-1873 (2005).

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Recent Talks 1. “Deflection of Asteroids Using Optical Pulses Generated from Sunlight”, (Invited Paper), NASA Near-Earth Object Detection and Threat Mitigation Study, Vail, Colorado, June 26-29, 2006. 2. Richard L. Fork, Spencer T. Cole, Blake Anderton and Stephen G. Aiken “Ultrafast phenomena and technology in relation to detecting, characterizing and mitigating potentially hazardous asteroids”, Postdeadline poster paper, Ultrafast Phenomena XV Conference, Asilomar, CA, July 31-Aug 4 (2006).

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