Patent ID: 8299417
Filing Date: 2012-10-30
Classification: G02B,H04J

Abstract:
1. An optical device, comprising: an input waveguide configured to receive an optical signal; a first coupler receiving the optical signal from the input waveguide; a first branch waveguide configured to receive a first portion of the optical signal from the coupler; a second branch waveguide configured to receive a second portion of the optical signal from the coupler; a second coupler receiving the first and second portions of the optical signal from the first and second branch waveguides, respectively; a first output waveguide, the second coupler being configured to combine first parts of the first and second portions of the optical signal onto the first output waveguide, the first parts of the first and second portions of the optical signal constituting a first combined signal; a second output waveguide, the second coupler further being configured to combine second parts of the first and second portions of the optical signal onto the second waveguide, the second parts of the first and second portions of the optical signal constituting a second combined signal; and a photodiode configured to receive the second combined signal.