Patent ID: 7627213
Filing Date: 2009-12-01
Classification: G02F

Abstract:
1. A Mach-Zehnder type optical modulator comprising: an incident waveguide that branches input light into branched lights; a pair of optical waveguides including a first optical waveguide and a second optical waveguide that respectively transmit the branched lights and exhibit an electro-optic effect; a pair of signal electrodes including a first signal electrode and a second signal electrode respectively arranged along the pair of optical waveguides; and an exit waveguide that outputs an interfered light of the branched lights transmitted respectively through the pair of optical waveguides, wherein polarizations of the pair of optical waveguides are reversed respectively at a boundary, and any one of a crossing of the first optical waveguide and the second optical waveguide or a crossing of the first signal electrode and the second electrode occurs near the boundary.