Velocity matched electro-optic phase modulator for wide optical sideband generation

30 January 1992

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 28 (3) , 330-332
https://doi.org/10.1049/el:19920205

Abstract

A novel ultrafast and high effective electro-optic phase modulator is reported, in which the velocity matching between light group velocity and microwave phase velocity is achieved by using a higher-order mode of the microstrip line on an electro–optic crystal. This modulator can be used for long interaction length, hence an enormously wide optical sideband with low microwave power can be obtained. In an experiment using a modulator with a 20 mm long modulating electrode on the LiTaO₃ crystal, wide optical sideband spectra of 680GHz (FWHM) were generated at 16.2GHz modulation frequency.

Keywords

INTERACTION LENGTH
680 GHZ
OPTICAL SIDEBAND GENERATION
MICROSTRIP LINE
LIGHT GROUP VELOCITY
16.2 GHZ
FWHM
ELECTRO-OPTIC PHASE MODULATOR
MICROWAVE PHASE VELOCITY
LITAO3
VELOCITY MATCHING

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