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Conferences > OFC > 1985 > MH > MH4

Simple theory of optical dual-filter heterodyne FSK receivers with non-negligible (semiconductor) laser linewidths

G. Jacobsen and I. Garrett

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Abstract

Ideally, optical receivers for FSK systems using narrow linewidth lasers are expected to be 3 dB more sensitive (in peak power) than heterodyne ASK receivers. Since semiconductor lasers can be directly frequency-modulated with suitable equalization, FSK looks like an attractive option for coherent wideband networks, with a very large multiplexing potential. Here we model the effects of non-negligible laser linewidth on dual-filter heterodyne FSK receivers and compare FSK with heterodyne ASK systems discussed in a companion paper.1

© 1985 Optical Society of America

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