III-V Direct-bandgap semiconductor optical filter

Details III-V Direct-bandgap semiconductor optical filter III-V Direct-bandgap semiconductor optical filter

1978-08-28

1980-10-14

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

370 3, 455612, G01J 334

Patent

active

042283493

ABSTRACT:
A thin plate of III-V direct-bandgap semiconductor, preferably with anti-reflective coatings, operates as superior optical filter for light having a wavelength which exceeds a given wavelength in the visible or infra-red spectrum. Such a filter is particularly suitable for use in a duplex optical communication system employing a fiber-optic transmission line.

REFERENCES:
patent: 3571597 (1971-03-01), Wood et al.
patent: 3953727 (1976-04-01), D'Auria et al.

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