Patent ID: 6337931
Filing Date: 2002-01-08
Classification: G02B

Abstract:
An effective optical path length compensable optical device for receiving an optical signal having two polarization components as an input and outputting the optical signal to an external path, comprising:a substrate; and a plurality of optical waveguides, at least one of said plurality of optical waveguides having a double refraction, each of said plurality of optical waveguides for propagating two polarization components of the optical signal, and at least one of said plurality of optical waveguides being disposed on said substrate; said plurality of optical waveguides being designed such that when the optical signal propagates through said plurality of optical waveguides, two inter-polarization effective optical path lengths for the optical signal are equal to each other, each of the effective optical path lengths being defined as a product of a refraction index and length of said optical waveguide.