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Proceedings Paper

Optical Gain Results Of The Los Alamos Free-Electron Laser Amplifier Experiment
Author(s): Brian E. Newnam; Roger W. Warren; Keith Boyer; John C. Goldstein; Michael C. Whitehead; Charles A. Brau
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Paper 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.

Paper Details

Date Published: 16 February 1984
PDF: 12 pages
Proc. SPIE 0453, Free-Electron Generators of Coherent Radiation, (16 February 1984); doi: 10.1117/12.947086
Show Author Affiliations
Brian E. Newnam, University of California (United States)
Roger W. Warren, University of California (United States)
Keith Boyer, University of California (United States)
John C. Goldstein, University of California (United States)
Michael C. Whitehead, University of California (United States)
Charles A. Brau, University of California (United States)


Published in SPIE Proceedings Vol. 0453:
Free-Electron Generators of Coherent Radiation
Charles A. Brau; Stephen F. Jacobs; Marlan O. Scully, Editor(s)

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