Coherent light generators – Particular active media – Amorphous
Patent
1980-12-02
1983-09-06
Sikes, William L.
Coherent light generators
Particular active media
Amorphous
372 69, 372 68, H01S 317
Patent
active
044033230
ABSTRACT:
A device which uses a light signal to control the amplification of light is disclosed. Optically active ions in a laser material are pumped to an intermediate energy state by light of a first frequency, and thereafter pumped from the intermediate energy state to an upper energy state by light of a second frequency. Lasing occurs when the optically active ions fall back to the intermediate energy state. When the intensity of the light of the first frequency is below the threshold pumping level, no laser action can occur even though the intensity of the light of the second frequency is above its threshold pumping level. Thus a large output power can be controlled by a small input power.
REFERENCES:
patent: 4038610 (1977-07-01), Nishizawa et al.
patent: 4132962 (1979-01-01), Yang et al.
patent: 4321559 (1982-03-01), Esterowitz
Chivian et al., "The Photon Avalanche: A New Phenomenon in Pr.sup.3 + -Based Infrared Quantum Counters," Appl. Phys. Lett. 35(2) 15 Jul. 1979, pp. 124-125.
Esterowitz et al., Appl. Phys. Lett., vol. 35, No. 3 (Aug. 1, 1979) pp. 236-239, Long-Wavelength Stimulated Emission via Cascade Laser Action in HO:YLF.
1979 IEEE/OSA Conference on Laser Engineering and Applications, May 30-Jun. 1, 1979 by Erlich et al.
Beers R. F.
Jr. Leon Scott
Sheinbein Sol
Sikes William L.
Wynn J. G.
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