Coherent light generators – Particular beam control device – Nonlinear device
Patent
1981-06-12
1984-01-31
Sikes, William L.
Coherent light generators
Particular beam control device
Nonlinear device
372 94, 372 20, 356350, 350393, H01S 310
Patent
active
044293933
ABSTRACT:
Apparatus for providing an amplified, phase-conjugated output beam. A nonlinear medium, gain medium, and output device are disposed along an optical path to form a ring resonator. An external laser source provides laser light to one end of the nonlinear medium which induces stimulated Brillouin scattering in the medium. Light provided by the gain medium at a first predetermined frequency is reflected from the acoustic waves traversing the nonlinear medium at a second predetermined frequency. The reflected light traverses the optical path through the gain medium and impinges upon the other end of the nonlinear medium, where it is further reflected from the acoustic waves. This reflected light is frequency shifted to the original predetermined frequency. A portion of the light at the predetermined frequency is coupled out of the resonator as an amplified phase-conjugated output beam by means of the output device. Alternatively, output beams at both the first and second predetermined frequencies may be provided.
REFERENCES:
patent: 3393955 (1968-07-01), Sterzer
patent: 3528029 (1970-09-01), Holmboe et al.
patent: 4040718 (1977-08-01), Bjorklund et al.
patent: 4321550 (1982-03-01), Evtohov
patent: 4344042 (1982-08-01), Hon
"Servo Tuning and Stabilization of Nonlinear Optical Crystals" by Bjorklund et al; IEEE Jour. Quant. Elect. vol. QE-15, No. 4, Apr. 1979.
Collins D. W.
Hughes Aircraft Company
Jr. Leon Scott
Karambelas A. W.
Moore J. Dennis
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