Patent ID: 6574409
Filing Date: 2003-06-03
Classification: G02B

Abstract:
A temperature-compensated optical waveguide circuit device comprising:a substrate; and an optical phased-array having a plurality of curved waveguide cores of different lengths supported on said substrate, wherein pairs of adjacent ones of said plurality of curved waveguide cores have a geometrical path length difference that is selected to correspond to a channel wavelength, wherein each of said plurality of curved waveguide cores includes a first silica segment, a second silica segment, and a central polymer segment coupling said first silica segment with said second silica segment to form a continuous waveguide core, said polymer segment guiding light from the first silica segment to the second silica segment to eliminate free propagation of light and reduce loss of signal power when a light signal is propagated along the waveguide, a ratio of a geometrical path difference between each of said pairs of adjacent ones of said plurality of waveguide cores in said first silica segment and said second silica segment to a geometrical path difference between the adjacent waveguide cores in the polymer segments selected to minimize temperature-induced variations in an overall optical path difference of the waveguide cores.