Optical switch for use with optical fibers

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

G - Physics

02

F

88/97.4

G02F 1/19 (2006.01) G02B 5/23 (2006.01) G02F 1/29 (2006.01) G02F 1/313 (2006.01)

Patent

CA 2031823

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.

ommutateur optique servant à commuter un chemin optique en changeant l'indice de réfraction du milieu périphérique d'une zone de couplage optique d'un coupleur directif. Ce changement est réalisé par la présence d'un composé photochrome dans le milieu périphérique de la zone de couplage optique. Lorsque le composé photochrome est frappé par une lumière d'une longueur d'onde particulière, il subit une réaction photochrome qui change l'indice de réfraction du milieu périphérique de la zone de couplage optique. Cette réaction est réversible par l'action d'une lumière d'une autre longueur d'onde particulière.

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