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Time-domain measurement of chirp suppression for a multisection distributed-feedback laser

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Abstract

Optical communications systems employing intensity modulation and direct detection have economic advantages over coherent angle-modulated systems because of the simplicity of the receiver design. However, the measurement of frequency chirping for signals containing strong intensity modulation is complicated by the intensity-dependent transfer characteristic of optical discriminators, thus limiting their usefulness for analysis of typical amplitude-shift keying waveforms.1 Time-domain measurement of frequency chirp is useful in determining the chirp at a particular location in the pulse and its associated power.2

© 1991 Optical Society of America

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