Coherent light generators – Particular beam control device – Q-switch
Patent
1986-12-23
1988-08-02
Davie, James W.
Coherent light generators
Particular beam control device
Q-switch
372 13, 372 71, 372 72, H01S 311, H01S 3117, H01S 3092
Patent
active
047617861
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. Q-switching the compact 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 than fused silica. Pulsewidths of 10-50 ns are achieved at pulse energies of 10-20 microjoules. TEMOO output is easily produced by the compact laser pumped solid state resonator. Applications include materials processing, link blowing in semiconductor memories, marking and scribing, and optical time domain reflectometry.
REFERENCES:
patent: 3949319 (1976-04-01), Tofield et al.
patent: 4308506 (1981-12-01), Ellis
patent: 4653056 (1987-03-01), Baer et al.
Egorov et al., "Single-Frequency Q-Switch Neodymium Laser", Sov. J. Quant. Electron, vol. 5, No. 3, 1975, pp. 291-293.
Davie James W.
Davis Paul
Epps Georgia Y.
Spectra-Physics Inc.
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