Textured surface, graded gap switch for transmission line optica

Details Textured surface, graded gap switch for transmission line optica Textured surface, graded gap switch for transmission line optica

1986-12-08

1988-07-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

H01J 4014

Patent

active

047556633

ABSTRACT:
An optical switch is formed by a microstrip transmission line on the surface of a photoconductive semiconductor medium. The transmission line has a small gap which produces an open circuit between a microwave (or other electrical signal) source and a detector connected at opposite ends of the line. This gap is filled (and the microwave circuit thereby completed) by copious electrical charges which are generated in a semiconductor surface region across the gap in response to optical radiation. The gap is composed of a textured surface graded composition photosensitive semiconductor material to provide high speed and reduced noise.

REFERENCES:
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patent: 4383269 (1983-05-01), Capasso
patent: 4494132 (1985-01-01), Kohn
patent: 4514582 (1985-04-01), Tiedje et al.
patent: 4555622 (1985-11-01), Glass et al.
patent: 4558336 (1985-12-01), Chang et al.
patent: 4626613 (1986-12-01), Wenham et al.
"Optical Switch", IBM Technical Disclosure Bulletin, vol. 29, No. 6, 11/86, pp. 2708-2709.

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