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      Transmission of 8 x 20 Gb/s DQPSK signals over 310-km SMF with 0.8-b/s/Hz spectral efficiency

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          Phase noise in photonic communications systems using linear amplifiers

          Spontaneous emission noise limits the capacity and range of photonic communications systems that use linear optical amplifiers. We consider here the question of phase detection in such systems. Amplitude-to-phase-noise conversion occurs owing to the nonlinear Kerr effect in the transmission fiber, resulting in optimal phase noise performance when the nonlinear phase shift of the system is approximately 1 rad. Error-free state-of-the-art systems that use phase detection at multigigabit rates are thereby limited to a range of a few thousand kilometers.
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            Experimental investigation of the performance limitation of DPSK systems due to nonlinear phase noise

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              10 Gb/s optical differential quadrature phase shift key (DQPSK) transmission using GaAs/AlGaAs integration

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                Author and article information

                Journal
                IEEE Photonics Technology Letters
                IEEE Photon. Technol. Lett.
                Institute of Electrical and Electronics Engineers (IEEE)
                1041-1135
                1941-0174
                May 2003
                May 2003
                : 15
                : 5
                : 769-771
                Article
                10.1109/LPT.2003.809983
                5f6119ba-d6b3-4841-9285-7e4a9ce5b008
                © 2003
                History

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