Semiconductor laser device

Details Semiconductor laser device Semiconductor laser device

1990-01-08

1991-05-28

Epps, Georgia

Coherent light generators

Particular active media

Semiconductor

372 34, 357 72, 357 74, 350338, H01S 319

Patent

active

050200658

ABSTRACT:
A semiconductor laser device comprise a semiconductor laser light emitting element, and a cap that covers and hermetically seals the laser light emitting element in a package. Laser light emitted from the element goes out through a hole formed in the top wall of the cap. A reflected light blocking element is disposed in the hole in the top wall of the cap. The reflected light blocking element includes a twisted-nematic liquid crystal cell and a pair of polarizers between which the twisted-nematic liquid crystal cell is disposed.

REFERENCES:
patent: 3837729 (1974-09-01), Harsch
patent: 4422730 (1983-12-01), Kozaki et al.
patent: 4545648 (1985-10-01), Shulman et al.
patent: 4763993 (1988-08-01), Vogeley et al.
patent: 4799770 (1989-01-01), Kahn et al.
patent: 4861142 (1989-08-01), Tanaka et al.

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