Optical switch utilizing two unidirectional waveguide couplers

Details Optical switch utilizing two unidirectional waveguide couplers Optical switch utilizing two unidirectional waveguide couplers

G - Physics

02

F

G02F 1/295 (2006.01) G02F 1/313 (2006.01) G02F 1/01 (2006.01) G02F 1/065 (2006.01)

Patent

CA 2308807

An optical waveguide switch using two unidirectional waveguide couplers with coupling gratings is provided. Each unidirectional waveguide coupler compromises two waveguide channels and a coupling grating along one waveguide channel. Two such waveguide couplers with coupling gratings are positioned on a substrate to form a symmetric couple-pair. An optical signal launched into the input port of the first coupler may exit from the output port of the second coupler. A modulating electrode is used to eliminate the coupling gratings on the two couplers, and the optical signal launched into the input port of the first coupler exits from its own output port. Similarily, this process can also be performed for an optical signal launched into the second coupler. Thus an effective 2x2 switching performance is implemented with this structure. MxN switching performance may also be implemented with several 2x2 waveguide switches.

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