| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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The Gordon–Mollenauer Effect in 112 Gbit/s DP-QPSK Systems |
| QIAO Yao-Jun**, ZHOU Ji, QIAN Wen-Hui, JI Yue-Feng |
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876
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| Cite this article: |
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QIAO Yao-Jun, ZHOU Ji, QIAN Wen-Hui et al 2013 Chin. Phys. Lett. 30 084203 |
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Abstract Gordon and Mollenauer (G-M) proposed in 1990 that the interplay between the nonlinear Kerr effect and amplified spontaneous emission noise can generate an enhanced level of noise and degrade the performance of optical phase-modulated systems. We systematically investigate the G-M effect in 112 Gbit/s coherent dual polarization quaternary phase shift keying (DP-QPSK) systems through comprehensive simulation. The results show that in the presence or absence of inline dispersion compensation, the G-M effect will seriously damage the system performance. Some of our important conclusions are listed as follows: with the increase in the input power into each span, the G-M effect is enhanced simultaneously; the smaller the span length, the stronger the G-M effect caused by more inter-span interaction; for non-zero dispersion-shifted fibers, different coefficient values will cause a similar amount of G-M effect penalty; by comparing the system performance with different dispersion compensation ratios, one can conclude that different residual dispersions of the same magnitude, no matter whether they are under-compensated or over-compensated, can derogate the overall system performance to a similar degree. In brief, the G-M effect cannot be ignored. We also have a short discussion on how to reduce and compensate for the G-M effect in DP-QPSK systems.
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Received: 02 May 2013
Published: 21 November 2013
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| PACS: |
42.65.Hw
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(Phase conjugation; photorefractive and Kerr effects)
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42.79.Sz
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(Optical communication systems, multiplexers, and demultiplexers?)
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