Design of quasi-velocity-matched LiTaO3 phase modulator

Yue Wang; Jianhong Shi; Jialing Yang; Xianfeng Chen; YuXing Xia

doi:10.1117/12.401694

3 October 2000 Design of quasi-velocity-matched LiTaO₃ phase modulator

Yue Wang, Jianhong Shi, Jialing Yang, Xianfeng Chen, YuXing Xia

Proceedings Volume 4220, Advanced Photonic Sensors: Technology and Applications; (2000) https://doi.org/10.1117/12.401694
Event: Optics and Optoelectronic Inspection and Control: Techniques, Applications, and Instruments, 2000, Beijing, China

Abstract

In common electro-optic modulators (EO), the inherent velocity mismatching between the optical wave and microwave is the major factor hampering efficient modulation. In this paper, we briefly compare periodically reversed electrode and domain reversal scheme (two ways of achieving quasi-velocity- matching), then we give the design principle of the EO modulator using domain reversal scheme. At last, we conclude that the bulk LiTaO₃ EO modulator can obtain quasi- velocity-matching at special frequency and make the modulation index increase proportionally to the interaction length. As an experiment, we use a 1.06 micrometer laser as a light source and a modulating microwave source at 6 GHz (16 W). We can expect that we will get at least 3.0 rads of modulation index.

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Yue Wang, Jianhong Shi, Jialing Yang, Xianfeng Chen, and YuXing Xia "Design of quasi-velocity-matched LiTaO₃ phase modulator", Proc. SPIE 4220, Advanced Photonic Sensors: Technology and Applications, (3 October 2000); https://doi.org/10.1117/12.401694

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