Patent ID: 7783138
Filing Date: 2010-08-24
Classification: G02F

Abstract:
1. A phase tracking monitor integrated with a Mach-Zehnder interferometric modulator comprising: an optical waveguide element comprising: a substrate comprising an electro-optic dielectric material for supporting the optical waveguide material on an upper surface thereof; a set of electrodes for applying an electric field proximate to the two branched optical waveguides for modulating a phase of the portions of the input optical signal propagating therethrough to generate a modulated optical signal having an on-state and an off-state at the output Y-junction; a fiber block attached to an output edge of the substrate for stably supporting the output optical fiber to receive the guided mode from the output optical waveguide; a first photodetector for generating a first photocurrent in response to light transmitted from the output edge of the substrate; and light-blocking material disposed between the output edge of the substrate and the first photodetector for blocking a portion of the radiating mode and the guided mode that reach the first photodetector.