Heterostructure lasers with combination active strip and passive

Details Heterostructure lasers with combination active strip and passive Heterostructure lasers with combination active strip and passive

1980-11-06

1983-02-01

Davie, James W.

Coherent light generators

Particular active media

Semiconductor

357 17, 372 46, H01S 319

Patent

active

043719660

ABSTRACT:
Heterostructure injection lasers include a combination optically coupled active and passive waveguide means forming an optically confining channel or strip between end facets. A passive or transparent waveguide means in the vicinity of the laser facets optically confines the radiation thereto in both dimensions transverse to the direction of propagation. The passive means is coupled to an active region of the laser which also optically confines the propagating radiation to the active region in both dimensions transverse to the direction of propagation. The active strip does not extend to the end facets of the laser. The combination active and passive means provides for high power, low divergence output beam, fundamental transverse mode control, lower operational current thresholds and the substantial elimination of laser astigmatism found in strip buried heterostructure lasers.

REFERENCES:
patent: 4270096 (1981-05-01), Hayashi et al.
patent: 4282494 (1981-08-01), Yonezu et al.
patent: 4297652 (1981-10-01), Hayashi et al.
patent: 4321556 (1982-03-01), Sakuma

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