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Conferences > CLEO > 1986 > WL > WL4

Reduced frequency chirp and suppressed harmonic distortion of a DFB-GRECC 1.5 µm laser under 3-GHz large-signal modulation

Michael M. Choy, S. G. Menocal, and I. P. Lee

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Abstract

For digital PCM modulation, especially at high frequencies, it is important to suppress frequency chirp. For analog applications, tight control of harmonic distortion is required. With a distributed feedback GRIN-rod external coupled-cavity DFB-GRECC1 InGaAsP laser modulated at 3 GHz and 50% modulation depth, we achieved a threefold reduction of frequency chirp and a suppression of 10 dB of harmonic distortion. Compared with other chirp-reduction schemes,2 this configuration is relatively simple, compact in design, and compatible with present laser packaging.

© 1986 Optical Society of America

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