High speed low loss optical switch for optical communication sys

Details High speed low loss optical switch for optical communication sys High speed low loss optical switch for optical communication sys

1990-02-20

1991-08-06

Lee, John D.

Optical waveguides

With optical coupler

Switch

359320, G02F 129

Patent

active

050371690

ABSTRACT:
A Fabry-Perot etalon is utilized as an optical switch for controllably switching an input optical signal on an input optical conduit between first and second output optical conduits. The etalon is comprised of a cavity formed by plane parallel periodic multilayer reflective surfaces with a variable index of refraction semiconductor medium sandwiched therebetween. The medium and periodic multilayer structures comprise, for example, Aluminum Gallium Arsenide. An optical pump injects an optical control beam into the medium to vary the index of refraction of the medium so as to cause the input optical signal to either be reflected from the cavity into the first output conduit or transmitted through the cavity to the second output conduit. Alternatively, electric fields, thermal fields, or injected carriers can be applied to the medium to vary the index of refraction thereof, thereby effecting the optical switching action.

REFERENCES:
patent: 4525687 (1985-06-01), Chemla et al.
patent: 4573767 (1986-03-01), Jewell
patent: 4585301 (1986-04-01), Bialkowski
patent: 4947223 (1990-08-01), Biefeld et al.

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