External optical resonator for a semiconductor laser

Details External optical resonator for a semiconductor laser External optical resonator for a semiconductor laser

1989-07-24

1991-06-11

Epps, Georgia

Coherent light generators

Particular resonant cavity

372 6, 372 97, 372 98, 372107, 372108, 372 99, 350 9612, 350 9615, H01S 308

Patent

active

050238850

ABSTRACT:
An external optical resonator for a semiconductor laser is composed of an optical directional coupler which can be formed as an integrated optical coupler with a short structural length that enables a free spectral range in the order of 100 GHz and enables the resonator and the system fiber to be coupled to the same end face of the laser. The resonator structure includes two optical waveguides with feedback means applied on the end faces of one of the waveguides and the other waveguide having one end face coupled to receive the output of the laser and the other end face of the other waveguide being coupled to the system fiber. The arrangement is particularly useful for tunable semiconductor lasers, particularly for heterodyne reception.

REFERENCES:
patent: 4690488 (1987-09-01), Gee et al.
patent: 4794617 (1988-12-01), Boeck
patent: 4799234 (1989-01-01), Haeussler et al.
patent: 4831631 (1989-05-01), Haeussler et al.
Wyatt et al., "Tunable Narrow Line External Cavity Lasers for Coherent Optical Systems", Br Telecom Technol. J., vol. 3, No. 4, Oct. 1985, pp. 5-12.

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