Direct-detection sensitivity for M-DPSK/BPolSK with large M is improved generating self-coherent gain without an actual local oscillator light source by means of a novel Optical Decision-Feedback-Aided Tapped-Delay-Line-Interferometer, along with 90deg optical hybrid, and analog post-processing.
© 2007 Optical Society of America
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.1660) Fiber optics and optical communications : Coherent communications
(130.0130) Integrated optics : Integrated optics
(130.3120) Integrated optics : Integrated optics devices
M. Nazarathy, Y. Yadin, M. Orenstein, Y. Lize, L. Christen, and A. Willner, " Enhanced Self-Coherent Optical Decision-Feedback-Aided Detection of Multi-Symbol M-DPSK/PolSK in Particular 8-DPSK/BPolSK at 40 Gbps," in Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference, OSA Technical Digest Series (CD) (Optical Society of America, 2007), paper JWA43.