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Wide-band integrated-optics electrooptic intensity modulator for (λ = 3.39)-μm operation

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Abstract

Waveguides that are single mode at λ = 3.39 μm have been fabricated in LiNbO3 by indiffusion of Ti. Mach-Zehnder interferometers using these waveguides have been used to modulate electrooptically the intensity of the radiation at this wavelength. One modulator design has achieved a linear small-signal 3-dB bandwidth of 1.8 GHz. An extinction ratio of 18.9 dB was obtained for a TE-polarized guided mode with an applied voltage, Vπ = 31 V.

© 1985 Optical Society of America

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