Optical decoding and coherent detection of a four-level FSK signal

Vincent A. O'Byrne; Timothy Tatlock; Samuel M. Stone

doi:10.1117/12.24912

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1 January 1991 Optical decoding and coherent detection of a four-level FSK signal

Vincent A. O'Byrne, Timothy Tatlock, Samuel M. Stone

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Proceedings Volume 1372, Coherent Lightwave Communications: Fifth in a Series; (1991) https://doi.org/10.1117/12.24912
Event: SPIE Microelectronic Interconnect and Integrated Processing Symposium, 1990, San Jose, United States

Abstract

A novel 4 level FSK technique for halving the number of transmitter lasers in a multichannel FSK system is described. This is accomplished by appropriately coding two independent binary signals into a 4 level FSK signal pnor to transmission. At the receiver the local oscillator optically decodes the signal prior to envelope detection. This scheme maintains the simplicity of a binary envelope detector and results in no system performance degradation over binary FSK.

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Vincent A. O'Byrne, Timothy Tatlock, and Samuel M. Stone "Optical decoding and coherent detection of a four-level FSK signal", Proc. SPIE 1372, Coherent Lightwave Communications: Fifth in a Series, (1 January 1991); https://doi.org/10.1117/12.24912

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