Electro-optic light modulator with branched ridge waveguide

A light modulator based on an electro-optic phase modulation and an optical interference of Mach-Zehnder type has been demonstrated. The modulator is constructed monolithically with a branching ridged optical waveguide on TiO2-diffused LiNbO3. The half-wave voltage is 19 V and the extinction ratio is 34%.