Proceedings Article | 29 October 2009
KEYWORDS: Nonlinear optics, Telecommunications, Dense wavelength division multiplexing, Complex systems, Eye, Dispersion, Polarization, Optical fibers, Optoelectronics, Scanning probe microscopy
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.
