18 July 2012 Nonlinear phase noise in coherent polarization-multiplexed quadrature phase-shift keying systems over dispersion managed link
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Abstract
Nonlinear phase noise (NLPN) induced by the interaction between the amplified spontaneous emission noise (ASE) and the information signal in polarization-multiplexed quadrature phase-shift keying (PM-QPSK) systems at 42.8(112) Gbit/s over dispersion-managed (DM) link is investigated by numerical simulations. Both symbol-aligned non-return-to-zero (NRZ) PM-QPSK and symbol-interleaved return-to-zero (RZ) PM-QPSK formats are considered and compared. We find that for aligned NRZ-PM-QPSK systems, the impact of NLPN on system performance seems rather weak due to the strong interchannel cross-polarization modulation (XPolM). However, when the interleaved RZ-PM-QPSK format is used, in which the XPolM is suppressed significantly, the system performance is seriously degraded by NLPN, especially at low bit rates. Results of 1000-km transmission employing standard single-mode fiber (SSMF) over DM link show that for 42.8 Gbit/s coherent RZ-PM-QPSK systems, the nonlinear threshold (NLT) will decrease from 6 to 2 dBm due to nonlinear phase noise when symbol-interleaved format is used.
© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE)
Xiaogang Yi, Xiaogang Yi, Fangzheng Zhang, Fangzheng Zhang, Jian Wu, Jian Wu, Yan Li, Yan Li, Wei Li, Wei Li, Xiaobin Hong, Xiaobin Hong, Hongxiang Guo, Hongxiang Guo, Yong Zuo, Yong Zuo, Jintong Lin, Jintong Lin, } "Nonlinear phase noise in coherent polarization-multiplexed quadrature phase-shift keying systems over dispersion managed link," Optical Engineering 51(7), 075003 (18 July 2012). https://doi.org/10.1117/1.OE.51.7.075003 . Submission:
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