<p> Formal Refereed Journal Publications</p><p>1. G. C. Herring, W. M. Fairbank, Jr., and C. Y. She, "Observation and Measurement of Molecular Flow Using Stimulated Raman Gain Spectroscopy," IEEE J. Quant. Electron. 17, 1975-1977 (1981). 2. G. C. Herring, S. A. Lee, and C. Y. She, "Measurements of a Supersonic Velocity in a Nitrogen Flow Using Inverse Raman Spectroscopy," Opt. Lett. 8, 214-217 (1983). 3. C. Y. She, G. C. Herring, H. Moosmüller, and S. A. Lee, "Stimulated Rayleigh- Brillouin Gain Spectroscopy in Pure Gases," Phys. Rev. Lett. 51, 1648-1651 (1983). 4. G. C. Herring, H. Moosmüller, S. A. Lee, and C. Y. She, "Flow Velocity Measurements with Stimulated Rayleigh-Brillouin Gain Spectroscopy," Opt. Lett. 8, 602-605 (1983). 5. H. Moosmüller, G. C. Herring, and C. Y. She, "Two-Component Velocity Measurement in a Supersonic Jet with Spatially Resolved Inverse Raman Spectroscopy," Opt. Lett. 9, 536-538 (1984). 6. C. Y. She, G. C. Herring, H. Moosmüller, and S. A. Lee, "Stimulated Rayleigh- Brillouin Spectroscopy," Phys. Rev. A 31, 3733-3740 (1985). 7. G. C. Herring, M. J. Dyer, and W. K. Bischel, "Temperature and Density Dependence of the Linewidths and Line Shifts of the Rotational Raman Lines in N2 and H2," Phys. Rev. A 34, 1944-1951 (1986). 8. G. C. Herring, M. J. Dyer, and W. K. Bischel, "Temperature and Wavelength Dependence of the Rotational Raman Gain Coefficient in N2," Opt. Lett. 11, 348- 350 (1986). 9. G. C. Herring and W. K. Bischel, "Model of the Rotational Raman Gain Coefficients for N2 in the Atmosphere," Appl. Opt. 26, 2988-2994 (1987). 10. C. Y. She, H. Moosmüller, and G. C. Herring, "Coherent Light Scattering for Supersonic Flow Measurements," Appl. Phys. B 46, 283-297 (1988). 11. G. C. Herring, M. J. Dyer, L. E. Jusinski, and W. K. Bischel, "Two-Photon Excited Fluorescence Spectroscopy of Atomic Fluorine at 170 nm," Opt. Lett. 13, 360-36 (1988). 12. G. C. Herring and M. E. Hillard, Jr., "Noise Amplitude Measurements of Single- Mode Lasers at Radio Frequencies," IEEE J. Quant. Electron. 28, 570-572 (1992). 13. G. C. Herring and B. W. South, "Pressure Broadening of Vibrational Raman Lines in N2 at Temperatures Below 300 K," J. Quant. Spectrosc. Radiat. Transfer 52, 835-840 (1994). 14. G. C. Herring and M. E. Hillard, Jr., "Effect of Crossed Beams on Stokes Gain and Interaction Length in Stimulated Raman Gain Spectroscopy," Appl. Opt. 34, 6837-6841 (1995). 15. G. C. Herring, W. L. Roberts, M. S. Brown, and P. A. DeBarber, "Temperature Measurement by Degenerate Four-Wave Mixing with Strong Absorption of the Excitation Beams," Appl. Opt. 35, 6544-6547 (1996). 16. G. C. Herring and M. E. Hillard, Jr., "Stark Broadening Using Crossed Gaussian Beams in Stimulated Raman Spectroscopy," J. Quant. Spectrosc. Radiat. Transfer 57, 739-744 (1997). 17. R. C. Hart, R. J. Balla, and G. C. Herring, "Observation of H2O in a Flame by the Two-Color Laser-Induced Grating Spectroscopy," Meas. Sci. Technol., 8, 917- 920 (1997). 18. R. C. Hart, R. J. Balla, and G. C. Herring, "Nonresonant Referenced Laser- Induced Thermal Acoustics Thermometry in Air," Appl. Opt. 38, 577-584 (1999). 19. R. J. Balla and G. C. Herring, "Raman Shifting a Tunable ArF Laser to Wavelengths of 190-240 nm," Rev. Sci. Instru. 71, 2246 (2000). 20. R. C. Hart, R. J. Balla, and G. C. Herring, "Optical Measurement of the Speed of Sound in Air Over the Temperature Range 300-650 K," J. Acoust. Soc. Am. 108, 1946-1948 (2000). 21. R. C. Hart, R. J. Balla, and G. C. Herring, "Simultaneous Velocimetry and Thermometry of Air Using Nonresonant Heterodyned Laser-Induced Thermal Acoustics," Appl. Opt. 40, 965-968 (2000). 22. B. Shirinzadeh, G. C. Herring, and R. J. Exton, "Examination of "Anomalous" Shock Velocities in Weakly Ionized Gases," AIAA Journal 39, 1210-1212 (2001). 23. R. J. Exton, R. J. Balla, B. Shirinzadeh, G. J. Brauckmann, G. C. Herring, W. C. Kelliher, J. Fugitt, C. J. Lazard, and K. V. Khodataev, “On-Board Projection of a Microwave Plasma Upstream of a Mach 6 Bow Shock,” Phys. of Plasmas 8, 5013-5017 (2001). 24. R. C. Hart, G. C. Herring, and R. J. Balla, “Common-Path Heterodyne Laser- Induced Thermal Acoustics for Seedless Laser Velocimetry,” Opt. Lett. 27, 710- 712 (2002). 25. Y. Li, W. L. Roberts, M. S. Brown, and G. C Herring, “Transient Grating Spectroscopy with Delayed Thermalization,” Opt. Commun. 226, 255-258 (2003). 26. D. W. Alderfer, G. C. Herring, P. M.Danehy, T. Mizukaki, and K. Takayama, “Sub-Microsecond Temperature Measurement in Liquid Water Using Laser- Induced Thermal Acoustics,” Appl. Opt. 44, 2818-2826 (2005). 27. R. J. Exton, S. Popovic, G. C. Herring, and M. Cooper, "Levitation Using Microwave-Induced Plasmas," Appl. Phys. Lett. 86, 124103-1-124103-2 (2005). 28. S. Popovic, R. J. Exton, and G. C. Herring, "Transition from Diffuse to Filamentary Regime in a Microwave-Sustained Surface Discharge," Appl. Phys. Lett. 87, 061502-1-061502-3 (2005). 29. A. J. Zuckerwar and G. C. Herrring, “Calibration of the Pressure Sensitivity of Microphones by a Free-Field Method at Frequencies Up to 80 kHz,” J. Acoust. Soc. Am. 119, 320-329 (2006). 30. D. Bivolaru and G. C. Herring, “Focal Plane Imaging of Crossed Beams in Nonlinear Experiments,” Rev. Sci. Instru. 78, 056102 (2007). 31. R. C. Hart, G. C. Herring, & R. J. Balla, “Pressure Measurement in Supersonic Air Flow by Differential Absorptive Laser-Induced Thermal Acoustics,” Opt. Lett. 32, 1689-1691 (2007). 32. G. C. Herring, “Mach-Number Measurement with Laser and Pressure Probes in Humid Supersonic Flow” final draft completed 33. G. C. Herring, “Optical Measurement of Velocity, Pressure, and Temperature in an Unseeded Supersonic Vortex,” final draft completed. Referenceable Oral Presentations (Includes AIAA papers and published Proceedings) 1. S. A. Lee, G. C. Herring, and C. Y. She, “High-Resolution Coherent Raman Spectroscopy for Supersonic Flow Measurements,” Proceedings of Sixth International Conference on Laser Spectroscopy, Interlaken, Switzerland, (June 27 – July 1, 1983). 2. G. C. Herring, M. J. Dyer, and W. K. Bischel, "Crossing Angle Dependence of the Vibrational Linewidths for Stimulated Raman Scattering in H2," Advances in Laser Science II No. 160, Proceedings of the 2nd ILS Conference, Seattle, WA (Oct 1986). 3. W. M. Huo, G. C. Herring, and W. K. Bischel, "Vibrational Raman Cross th Sections of the Overtone Transitions in H2 and N2," Proceedings of the 10 ICORS Eugene, OR (31 Aug 1986). 4. G. C. Herring, M. J. Dyer, and W. K. Bischel, "CW Stimulated Rayleigh- Brillouin Spectroscopy of Gases," 3rd ILS Conference, paper WF6, Atlantic City, NJ (19 Nov 1987). 5. M. W. Millard, M. S. Brown, P. A. DeBarber, W. L. Roberts, and G. C. Herring, "Simultaneous Degenerate Four-Wave Mixing and Imaging and Laser Induced Fluorescence of A2+ - X2 in a Methane-Air Flame," 25th International Symposium on Combustion, Irvine, CA (31 July 1994). 6. P. A. DeBarber, M. S. Brown, M. W. Millard, W. L. Roberts, G. C. Herring, and D. Eklund, "Degenerate Four-Wave Mixing Imaging of A2+ - X2 OH in a Methane-Air Flame," AIAA paper 95-0171, 33rd Aerospace Sciences Meeting, Reno, NV (Jan 9-12, 1995). 7. R. C. Hart, R. J. Balla, G. C. Herring, and L. N. Jenkins, “Seedless Laser Velocimetry Using Heterodyne Laser Induced Thermal Acoustics,” 19th International Congress on Instrumentation in Aerospace Simulation Facilities, Cleveland OH (27-30 Aug 2001). 8. K. D. Wright, et al., “Measurement Technology for Use in Active Flow Control,” AIAA paper 2002-2705, 22nd Aerodynamic Measurement Technology and Ground Testing Conference, St. Louis, MO, (24-26 June 2002). 9. W. M. Humphreys, Jr., C. H. Gerhold, A. J. Zuckerwar, G. C. Herring, and S. M. Bartram, “Performance Analysis of a Cost-Effective Electret Condensor Microphone Array,” AIAA paper 2003-3195, 9th AIAA/CEAS Aeroacoustics Conference, Hilton Head, SC (12-14 May 2003). 10. R. J. Exton, R. Jeffrey Balla, G. C. Herring, S. Popovic, and L. Vuskovic, “Volumetric Near-Field Microwave Plasma Generation,” AIAA paper 2003-4181, 34th AIAA Plasma Dynamics and Laser Conference, Orlando, FL (23-26 June 2003). 11. L. N. Jenkins, R. C. Hart, R. J. Balla, G. C. Herring, M. R. Khorrami, and M. M. Choudhari, “The Application of Laser-Induced Acoustics to a High-Lift Configuration,” SPIE paper # 5191-24, 48th International Symposium on Optical Science and Technology, San Diego, CA (August 3-8, 2003).</p><p>Others - NASA TM and CR Reports 1. B. Shirinzadeh and G. C. Herring, "Demonstration of Imaging Flow Diagnostics Using Rayleigh Scattering in Langley 0.3-Meter Transonic Cryogenic Tunnel," NASA Report TM-1999-208970 (Feb 1999). 2. R. J. Balla and G. C. Herring, "Raman Shifting a Tunable ArF Laser to Wavelengths of 190-240 nm with a Forced Convection Raman Cell," NASA Report TM-2000-209710 (April 2000). 3. R. C. Hart, R. J. Balla, and G. C. Herring, “Optical Measurement of the Speed of Sound in Air Over the Temperature Range 300-600 K,” NASA Report CR-2000- 210114 (April 2000). 4. R. C. Hart, R. J. Balla, and G. C. Herring, “Simultaneous Velocimetry and Thermometry of Air Using Nonresonant Heterodyned Laser-Induced Thermal Acoustics,” NASA Report CR-2000-210118 (May 2000). 5. G. C. Herring and M. E. Hillard, Jr., "Flow Visualization by Elastic Light Scattering in the Boundary Layer of a Supersonic Flow," NASA Report TM- 2000-210121 (Aug 2000). 6. R.C. Hart, R. J. Balla, G. C. Herring, and L. N. Jenkins, “Seedless Laser Velocimetry Using Heterodyne Laser-Induced Thermal Acoustics,” NASA Report CR-2001-211021 (Aug 2001). 7. R. C. Hart, G. C. Herring, and R. J. Balla, “Common-Path Heterodyne Laser- Induced Thermal Acoustics for Seedless Laser Velocimetry,” NASA Report CR- 2001-211252 (December 2001). 8. G. C. Herring and B. Shirinzadeh, “Flow Visualization of Density in a Cryogenic Wind Tunnel Using Planar Rayleigh and Raman Scattering,” NASA Report TM- 2002-211630 (June 2002). 9. G. C. Herring, R. C. Hart, M. T. Fletcher, R. J. Balla, and B. S. Henderson, “Prospects for Non-Linear Laser Diagnostics in the Jet Noise Laboratory,” NASA TM-2007-214893 (August 2007). 10. G. C. Herring, “Off-Body Measurement of Velocity, Pressure, and Temperature in an Unseeded Supersonic Air Vortex by Stimulated Raman Scattering,” draft completed</p><p>Others - NASA Tech Briefs 1. G. C. Herring, B. W. South, and R. J. Exton, "Apparatus for Translating the Sample Volume of a Coherent Raman Velocimeter Using Crossed and Counterpropagating Laser Beams," NASA Tech Briefs 18, 41-42 (1994). 2. Ken K. Tedjojuwono and G. C. Herring, “Nanoscale Hot-wire for Boundary- Layer Flows,” NASA Tech Briefs 45, 62-63 (Jan 2003) </p><p>Others - Unpublished 1. G. C. Herring, “Calculated Daily Solar Energy Collection for a Fixed Concentrating Collector,” MS Thesis, San Diego State University, 1978. 2. G. C. Herring, "Coherent Raman Spectroscopy for Supersonic Flow Measurement," PhD Dissertation, Colorado State University, 1987. 3. G. C. Herring, M. J. Dyer, and W. K. Bischel, “Stimulated Raman Spectroscopy of the Symmetric Stretch Vibration of CH3,” (1987). 4. G. M. Tennille, A. L. Overman, M. E. Hillard, Jr., and G. C. Herring, "An Evaluation of Parallel Computing on the Myrias SPS-2," (1991). 5. G. C. Herring, “Amplitude Noise Reduction of an Argon-Ion Laser with Optical Feedback,” (1998).</p>