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7 May 2004 Spectrum pruning of 42.7-Gb/s CS-RZ for spectrally efficient long-haul DWDM system
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Proceedings Volume 5281, Optical Transmission, Switching, and Subsystems; (2004)
Event: Asia-Pacific Optical and Wireless Communications, 2003, Wuhan, China
This paper focuses on the simulative optimization of modulation format, which is CS-RZ format with appropriate spectrum filtering, in a 42.7Gb/s spectrally efficient long-haul DWDM system. It is studied that the required bandwidth of the CS-RZ signal with spectrum pruning for channel spacing of 50GHz. The power loss and crosstalk are calculation under the Gaussian filter with various order and bandwidth. The influence on the CS-RZ waveform by the filter of various order and bandwidth was also investigated. Furthermore, the Q-value of the 42.7Gb/s CS-RZ signal was simulated before and after 640km fiber link transmission with 3 order Gaussian filter of various bandwidth, which simulative test system was designed as a 42.7Gb/s DWDM system with simultaneous C+L band discrete Raman amplifier by dispersion compensation fiber (DCF) as Raman medium. As a conclusion, the optimum filter bandwidth of 42GHz is obtained for the 42.7Gb/s 50GHz spaced DWDM system. Q-value of the signal is up to 8 and remains 6.7 after transmission of 640km fiber link, with the filter of the optimum bandwidth.
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Xiaohong Ma, Yanhe Li, Xin Chen, Shidai Liu, Hanyi Zhang, and Yili Guo "Spectrum pruning of 42.7-Gb/s CS-RZ for spectrally efficient long-haul DWDM system", Proc. SPIE 5281, Optical Transmission, Switching, and Subsystems, (7 May 2004);


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