We demonstrate 256-ary frequency-shift keying modulation with digital coherent detection, aiming at applications to space communications. The receiver sensitivity as high as 3.5 photons per bit is obtained at the bit-error rate of 10-3.
© 2011 OSA
(060.1660) Fiber optics and optical communications : Coherent communications
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.2920) Fiber optics and optical communications : Homodyning
K. Kikuchi and M. Osaki, "Highly-Sensitive Coherent Optical Detection of M-ary Frequency-Shift Keying Signal," in 37th European Conference and Exposition on Optical Communications, OSA Technical Digest (CD) (Optical Society of America, 2011), paper Tu.5.A.1.
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