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PhaseModulated Optical Communication Systems,New
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Fiberoptic communication systems have revolutionized our telecommunication infrastructures currently, almost all telephone landline, cellular, and internet communications must travel via some form of optical fibers. In these transmission systems, neither the phase nor frequency of the optical signal carries information only the intensity of the signal is used. To transmit more information in a single optical carrier, the phase of the optical carrier must be explored.As a result, there is renewed interest in phasemodulated optical communications, mainly in directdetection DPSK signals for longhaul optical communication systems. When optical amplifiers are used to maintain certain signal level among the fiber link, the system is limited by amplifier noises and fiber nonlinearities. PhaseModulated Optical Communication Systems surveys this newly popular area, covering the following topics: The transmitter and receiver for phasemodulated coherent lightwave systems Method for performance analysis of phasemodulated optical signals Directdetection DPSK signal with fiber nonlinearities, degraded by nonlinear phase noise and intrachannel effects Wavelengthdivisionmultiplexed directdetection DPSK signals Multilevel phasemodulated optical signals, such as the fourphase DQPSK signal.Graduate students, professional engineers, and researchers will all benefit from this updated treatment of an important topic in the optical communications field.
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