Tunable optical filter based on a physically-deformable...

Optical waveguides – With optical coupler – Input/output coupler

Reexamination Certificate

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Reexamination Certificate

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07027688

ABSTRACT:
The tunable optical filter includes an elastic substrate, a diffractive element in the elastic substrate, an actuator for stretching the elastic substrate to control the pitch of the diffractive element, a first optical path and a second optical path. The diffractive element optically couples the second optical path to the first optical path at an optical frequency determined by the pitch of the diffractive element.

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