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28 October 2009 The integrated impact of the combination of PMD and several nonlinear effects on 160G bit/s DWDM systems
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Abstract
With the help of modern 40Gb/s technology and the AON technology,160Gb/s DWDM optics communication system will be realized in the next few years. However, With broader spectrum, the signal suffers more from chromatic dispersion, optical fiber nonlinear effects ,such as FWM and XPM, as well as PMD.The combination of PMD and nonlinear effects results in more complexity. In this paper, based on nonlinear Schrödinger r equations, from where GVD, TOD, SPM, XPM, FWM and PMD synthetically derived, we investigate the system degradation induced by PMD and nonlinear effects via numerical simulation. The results show that when the signal power is low, PMD has more affection on system comparing with nonlinear effects, when signal power gets larger, nonlinear effects become dominating, but PMD may mitigate their impact to some degree. PMD is becoming major system impairment in high speed and long distance optical fiber transmission systems, we can use PMD compensation module such as a compact variable differential group delay (DGD) element base on concatenation via six magneto-optic polarization rotators (Faraday rotators) .We also study the impact of PMD to high speed optical fiber communication system with different modulation formats ,we get the conclusion that in the high speed and capacity optics system, RZ and SINE PULSE is often used in high transmitting power and low transmitting power, respectively.
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Wang Yu and Ouyang Zibo "The integrated impact of the combination of PMD and several nonlinear effects on 160G bit/s DWDM systems", Proc. SPIE 7514, Photonics and Optoelectronics Meetings (POEM) 2009: Fiber Optic Communication and Sensors, 75141A (28 October 2009); https://doi.org/10.1117/12.845076
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