Semiconductor laser that generates second harmonic light by mean

Details Semiconductor laser that generates second harmonic light by mean Semiconductor laser that generates second harmonic light by mean

1993-11-22

1994-11-08

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Nonlinear device

372 21, 372 99, 372 45, 372 92, H01S 310

Patent

active

053633903

ABSTRACT:
A surface-emitting laser with an integral nonlinear crystal. The laser generates light at a fundamental frequency. The nonlinear crystal converts the light into light at twice the fundamental frequency. The laser is configured in a vertical-cavity, surface-emitting structure. An adhesive layer containing indium such as indium gallium phosphide is disposed between a phosphide nonlinear crystal and an arsenide optical amplifier. The optical amplifier and the nonlinear crystal are fused together. The optical amplifier and the nonlinear crystal are located inside a laser cavity that is defined between a pair of reflectors. One of the reflectors is located adjacent the nonlinear crystal and is highly reflective of light at the fundamental frequency but transmissive of light at twice the fundamental frequency. Light is generated at the fundamental frequency, doubled in frequency as it passes back and forth through the nonlinear crystal, and emitted through the reflector adjacent the nonlinear crystal. An intracavity reflector may be included between the optical amplifier and the nonlinear crystal to prevent light at twice the fundamental frequency from propagating from the nonlinear crystal into the optical amplifier.

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M. J. Angell et al., "Orientation Patterning of II-VI Semiconductor Films for Quasi-phasematched Nonlinear Devices", Optical Society of America, 1992 Technical Digest Series, vol. 10, Mar. 22-24, 1993, Palm Springs, California.
R. J. Ram, et al., "analysis of Wafer Fusing of 1.3um Vertical Cavity Surface Emitting Lasers", Appl. Phys. Lett. 62(20), 17 May 1993, pp. 2474-2476.
D. Vakhshoori et al., "Blue-Green Surface-Emitting Second Harmonic Generators on (111)B GaAs", Appl. Phys. Lett. 59(8), 19 Aug. 1991, pp. 896-898.
M. A. Haase et al., "Blue-Green Laser Diodes", Appl. Phys. Lett. 59(11), 9 Sep. 1991, pp. 1272-1274.
J. J. Dudley et al., "Low Threshold, electrically Injected InGaAsP (1.3 um) Vertical Cavity Lasers on GaAs Substrates", 51st Annual Device Research Conference, June. 21-23, 1993, University of California, Santa Barbara, California, IEEE Electron Devices Society.
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