Patent ID: 9250455
Filing Date: 2016-02-02
CPC Classification: G02F,H04B

Claim Text:
1. An optical modulator comprising: an optical modulation unit having a Mach-Zehnder type optical waveguide and a modulation electrode for modulating light waves propagating through the Mach-Zehnder type optical waveguide, wherein the entire optical waveguide is formed such that a plurality of the optical modulation units are disposed in parallel on the same substrate, one input waveguide branches off to be connected to the Mach-Zehnder type optical waveguide of each optical modulation unit, and outputs from the Mach-Zehnder type optical waveguides are combined and are output through one output waveguide, a modulation signal with a same intensity is applied to a modulation electrode of each optical modulation unit, and in at least some of the optical modulation units, a length ratio of the modulation electrode is {cos