Traveling wave electrodes for 50 GHz operation of opto-electronic devices based on InP

We report on the design, fabrication and performance electro-optic switches based on a Mach-Zehnder interferometer with traveling wave electrodes. Our work aimed at increasing the bandwidth of such devices by reducing the loss parameter a of the electrodes. We realized an electrode configuration using electro-plated metallization layers and achieved a bandwidth of 50 GHz (6.4 dB electrical corresponding to 3 dB optical) suitable for the operation of optoelectronic devices up to 100 Gb/s.