16 February 1984 Optical Gain Results Of The Los Alamos Free-Electron Laser Amplifier Experiment
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Proceedings Volume 0453, Free-Electron Generators of Coherent Radiation; (1984) https://doi.org/10.1117/12.947086
Event: Free-Electron Generators of Coherent Radiation, 1983, Orcas Island, United States
Abstract
Optical gain has been detected at 10.6 μm during the recent tapered-wiggler free-electron laser amplifier experiment at Los Alamos. In addition, it was possible to measure separately the coherent spontaneous emission at the fundamental and at the second-hand third-harmonic wavelengths. Separation of the stimulated gain and coherent spontaneous emission from each other and from the high-power (gigawatt) CO2 laser radiation was possible by use of polarization analysis and passive frequency filtering in hot CO2 gas. The magnitude of the optical gain signals near resonance was consistent with the theoretically predicted gain of about 1%. Optical measurements as a function of several parameters of the electron beam (energy and current) and the CO2 laser (power) provided further supporting evidence for our identifications.
© (1984) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Brian E. Newnam, Brian E. Newnam, Roger W. Warren, Roger W. Warren, Keith Boyer, Keith Boyer, John C. Goldstein, John C. Goldstein, Michael C. Whitehead, Michael C. Whitehead, Charles A. Brau, Charles A. Brau, } "Optical Gain Results Of The Los Alamos Free-Electron Laser Amplifier Experiment", Proc. SPIE 0453, Free-Electron Generators of Coherent Radiation, (16 February 1984); doi: 10.1117/12.947086; https://doi.org/10.1117/12.947086
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