Patent ID: 7697801

Claim:
A spectrally selective optical switch, comprising a first and a second optical waveguide each having a light guiding structure arranged to guide light along a predetermined path, the optical waveguides being arranged adjacent and parallel to each other; an external resonator defined by a first and a second mirror, said first and said second mirror being provided on opposite sides and outside of said first and second light guiding structures, and said external resonator being resonant to a specific wavelength; and a deflector provided in each of said first and second optical waveguide, the deflectors being arranged to deflect light propagating in one of the light guiding structures to the other light guiding structure by operation of said external resonator, wherein the deflector in at least one of said first and second optical waveguides comprises: a first blazed Bragg grating arranged in said at least one of said first and second optical waveguides, and a second blazed Bragg grating arranged in said at least one of said first and second optical waveguides, wherein said first blazed Bragg grating and said second blazed Bragg grating are superimposed upon each other, and oriented at different angels to deflect light out from said at least one of said first and second optical waveguides into two anti-parallel beams.