Patent ID: 6449404
Filing Date: 2002-09-10
Classification: G02B,G02F

Abstract:
An optical switch comprising a first waveguide having a first core of a first material having a first input end and a first output end;and a second waveguide having a second core of the first material having second input end and a second output end, the first input end being spaced from the second input end by a distance d2, and a coupling region between the first input end and the first output end, wherein the first and second waveguide cores are very closely spaced by a distance d1, wherein d1<2; and a second material contacting the first and second waveguide cores in the coupling region, the second material being different than the first material; and, means for providing a refractive index difference between the first and second materials to providing switching of light launched into one of the input ports.