Optical switch for use with optical fibers

Details Optical switch for use with optical fibers Optical switch for use with optical fibers

1990-12-18

1992-02-25

Ullah, Akm

Optical waveguides

With optical coupler

Switch

G02B 602

Patent

active

050919849

ABSTRACT:
An optical switch for switching an optical path by changing the refractive index of the circumference of a light coupling region of a directional coupler is disclosed. Such a change is accomplished by a photochromic compound in the circumferential medium of the light coupling region. Such a photochromic compound when beamed with light of a specific wavelength undergoes a photochromic reaction which changes the refractive index of the circumferential medium of the light coupling region. Such a reaction is reversible when beamed with light of another specific wavelength.

REFERENCES:
patent: 3668663 (1972-06-01), Chandross et al.
patent: 4786130 (1988-11-01), Georgiou et al.
patent: 4796968 (1989-01-01), Coccoli et al.
patent: 4989946 (1991-02-01), Williams et al.

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