High-Speed Ti:LiNbO3 and Semiconductor Optical Modulators

Kenji KAWANO  

IEICE TRANSACTIONS on Electronics   Vol.E76-C   No.2   pp.183-190
Publication Date: 1993/02/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Special Issue on Optical/Microwave Interaction Devices, Circuits and Systems)
Ti:LiNbO3,  optical waveguide,  optical modulator,  

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This paper reviews Ti:LiNbO3 and semiconductor optical waveguide modulators. The operating principle of the Ti:LiNbO3 optical waveguide modulator is based on the Pockels effect. On the other hand, semiconductor optical modulators can be operated based on the Pockels effect, the Franz-Keldysh effect, or the quantum confined stark effect (QCSE) by employing multiple quantum wells (MQWs). Ti:LiNbO3 optical waveguide modulators are discussed with emphasis on the velocity-matching and optical waveguides. MQW optical waveguide modulators are discussed in view-point of design of a MQW structure, waveguide and modulation bandwidth.