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

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

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

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.

Citation Download Citation

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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