Semiconductor laser device having little astigmatism

Details Semiconductor laser device having little astigmatism Semiconductor laser device having little astigmatism

1987-02-19

1988-10-25

Davie, James W.

Coherent light generators

Particular active media

Semiconductor

372 29, 372 92, 372108, H01S 319

Patent

active

047808799

ABSTRACT:
A semiconductor laser device having a stripe-shaped active region defined between a pair of end surfaces, at least one of the end surfaces having a curved cross-section in a plane parallel to the active region with a radius of curvature from 10 to 300 .mu.m, the stripe of the active region having such a width that a single transverse mode and a multi-longitudinal mode are allowed. The laser beam emitted from this laser can have little astigmatism and small spot size.

REFERENCES:
T. Mamine et al, "Analysis of Astigmatism of Gain Guided Laser with a Tapered Stripe Geometry", J. Appl. Phys. 56(11) 1 Dec. 1984, pp. 3116-3120.
J. Salzman et al, "Unstable Resonator Cavity Semiconductor Lasers", Appl. Phys. Lett. 46(3), 1 Feb. 1985, pp. 218-220.

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