Integrated Electro-optic Devices
Integrated electro-optic devices serve the functions of rapid light modulation, time-multiplexing, signal routing, tunable filtering, and polarization conversion. They are attractive devices due to their potential applications for wide-band optical communication, optical signal processing, and sensors. Today, most interest is given to electro-optic devices on LiNbO3 because of the known technology for fabricating optical strip waveguides, their large modulation bandwidth B beyond 10 GHz and their relatively low driving power of about 100 mW. The growing interest in semiconductor-based integrated optics resulted in various examples of electrooptic modulators on GaAs- and InP-substrates. We compare both technologies. However, emphasis is given here to the operational principles, the configurations, and properties of LiNbO3 modulators with titanium indiffused strip waveguides.
KeywordsTitanium Attenuation GaAs Coupler
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