Coherent light generators – Particular pumping means – Pumping with optical or radiant energy
Patent
1987-06-15
1989-07-11
Sikes, William L.
Coherent light generators
Particular pumping means
Pumping with optical or radiant energy
372 3, 372 6, 372 10, 372 13, 372 69, 372 72, H01S 3091, H01S 309
Patent
active
048478504
ABSTRACT:
A miniaturized Q-switch is added to the resonant cavity of a compact laser diode pumped solid state laser to produce short high peak power pulses which are input into a single mode optical fiber to form a compact continuum generator. Q-switching the compact laser diode pumped solid state lasers takes advantage of the relatively high gain and short cavity length to provide a desirable combination of pulsewidth and pulse energy. Nd:YAG or Nd:YLF are useful solid state laser materials for Q-switching, or other longer lifetime rare earth ions such as erbium or holmium for greater energy storage. The Q-switch is formed of a material such as TeO.sub.2, SF.sub.10, or LiNbO.sub.3 with an acoustooptic figure of merit substantially greater tha fused silica. The high peak powers of the lasers are sufficient to exceed the threshold for Raman conversion in the fiber which produces a series of red shifted bands ending in a continuum by stimulated Raman scattering.
REFERENCES:
patent: 3949319 (1976-04-01), Tufield et al.
patent: 4308506 (1981-12-01), Ellis
patent: 4486884 (1984-12-01), White
patent: 4653056 (1987-03-01), Baer et al.
Cohen et al. "A Universal Fiber-Optic (UFO) Measurement System Based on a Near-IR Fiber Raman Laser", IEEE Journal of Quantum Electronics, vol. QE-14, No. 11, Nov. 1978, pp. 855-859.
Baer Thomas M.
Kafka James D.
Linne Mark
Davis Paul
Epps Georgia Y.
Sikes William L.
Spectra-Physics Inc.
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