Accession Number : ADD014974

Title :   Narrow-Bandwidth Diffraction-Limited Coupled Stable-Unstable Resonator Laser Cavity.

Descriptive Note : Patent, Filed 27 Sep 90, patented 30 Apr 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Reintjes, John F ; Tankersley, Lawrence L ; Cooper, David G ; Dexter, James L

Report Date : 30 Apr 1991

Pagination or Media Count : 7

Abstract : A laser cavity providing high power laser radiation with diffraction-limited divergence and narrow-band-width comprises: a stable laser cavity including a gain medium, which generates and amplifies laser radiation, optically coupled to first and second reflectors and an optical coupler; and an unstable laser cavity including the gain medium, the first reflector, the optical coupler and a scraper mirror. The scraper mirror is located between the gain medium and the optical coupler for producing an output beam. The stable laser cavity is restricted to operate on a low order TEM mode by an aperture located between the optical coupler and the second reflector. A frequency narrowing element located between the optical coupler and the second reflector narrows the bandwidth of the laser radiation in the stable laser cavity. The optical coupler couples the narrow bandwidth laser radiation from the stable laser cavity to the unstable laser cavity, thereby producing narrow bandwidth laser radiation in the output beam. (Author)

Descriptors :   BANDWIDTH, COUPLERS, COUPLING(INTERACTION), GAIN, HIGH POWER, LASER BEAMS, LASER CAVITIES, LASERS, MIRRORS, NARROWBAND, OPTICAL EQUIPMENT, OUTPUT, REFLECTORS, SCRAPERS, STABILITY

Subject Categories : Lasers and Masers
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE