Tunable optical directional couplers

Details Tunable optical directional couplers Tunable optical directional couplers

1987-09-02

1988-04-12

Lee, John

350 9614, 350 9615, G02B 626

Patent

active

047370025

ABSTRACT:
Optical couplers, whether in integrated or fibre optics, where there is at least one input lightpath coupled to two or more output lightpaths by depositing a film of resistive metal over the coupling region and passing current through the film. This heats up the coupler and thus increases the refractive index forming a preferential light path through the heat region. Thus by heating particular regions, and by varying current through the film, the coupler is tuned as desired.

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