Balanced bridge modulator switch using Ti-diffused LiNbO3 strip waveguides
- 15 May 1978
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 32 (10) , 644-646
- https://doi.org/10.1063/1.89880
Abstract
An experimental integrated optical version of the Mach‐Zehnder interferometer switch, analogous to the microwave balanced bridge, is reported. The bridge is formed by 3‐μm‐wide Ti‐diffused strip waveguides in LiNbO3 and the switch utilizes electro‐optical tuning to achieve 3‐dB operation of the directional couplers. The switching voltage required to switch between the states, corresponding to a π phase shift in one arm, equals 14.8 V. The cross talk between channels that corresponds to the extinction ratio when operated as an on‐off modulator is −21.6 dB.Keywords
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