Amplifiers – Parametric amplifiers – Semiconductor type
Patent
1981-10-09
1985-12-17
Moskowitz, Nelson
Amplifiers
Parametric amplifiers
Semiconductor type
372 20, 372 94, 372102, H01S 3086, H01S 310, G01B 902
Patent
active
045595003
ABSTRACT:
A tuning arrangement (10) for a tunable laser comprises a single holographic grating (12) and two flat surface reflective mirrors (13 and 14). The beam (15) from the laser cavity is incident on the grating at a grazing angle for optimum beam expansion. The diffracted beam propogates from the grating to the first mirror (13), therefrom to the second mirror (14) and is reflected at the Littrow angle to the grating, whereat it is diffracted a second time and returned to the second mirror (14) for reflection to the first mirror (13). Therefrom it is reflected back to the grating. After undergoing a third diffraction it is directed back into the cavity for further amplification.
REFERENCES:
patent: 3691477 (1972-09-01), Janney
patent: 3928817 (1975-12-01), Chodzko
patent: 4229710 (1980-10-01), Shoshan
patent: 4287486 (1981-09-01), Javan
patent: 4361889 (1982-11-01), Johnson
"Single-Mode Operation of Grazing-Incidence Pulsed Dye Laser" by Michael G. Littman, Optics Letters, vol. 3, pp. 138-140, Oct. 1978.
Saikan et al., "Modified Double-Grating . . . Dye Laser", 7/81, pp. 1339-1340, Jpn. J. Appl. Phys., vol. 20, No. 7.
Dinev et al., "A Novel Double Grazing-Incidence . . . Laser", 7/80, pp. 287-291, Appl. Phys. vol. 22, No. 3.
Shoshen et al., "Narrowband Operation . . . Expansion", 11/77, pp. 4495-4497, Jour. App. Phys., vol. 48, No. 11.
McDermid Iain S.
Pacala Thomas J.
California Institute of Technology
Moskowitz Nelson
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