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Pump Light Power of Wideband Optical Phase Conjugator using HNL-DSF in WDM Systems with MSSI  

Lee Seong real (Div. of Marine Electro. and Comm. Eng., Mokpo National Maritime University)
Cho Sung eun (School of Inform. and Telecomm. Eng., Sunchon National University)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.3A, 2005 , pp. 168-177 More about this Journal
Abstract
In this paper, we numerically investigated the optimum pump light power resulting best compensation of pulse distortion due to both chromatic dispersion and self phase modulation (SPM) in long-haul 3×40 Gbps wavelength division multiplexing (WDM) systems. We used mid-span spectral inversion (MSSI) method with path-averaged intensity approximation (PAIA) as compensation approach, which have highly nonlinear dispersion shifted fiber (HNL-DSF) as nonlinear medium of optical phase conjugator (OPC) in the mid-way of total transmission line. We confirmed that HNL-DSF is an useful nonlinear medium in OPC for wideband WDM transmission, and in order to achieve the excellent compensation the pump light power is selected to equal the conjugated light power into the latter half fiber section with the input light power of WDM channel depending on total transmission length. Also we confirmed that compensation degree of WDM channel with small conversion efficiency is improved by using pump light power increasing power conversion ratio upper than 1.
Keywords
Optical Phase Conjugator (OPC); Highly Nonlinear Dispersion Shifted Fiber(HNL-DSF); Mid-Span Spectral Inversion (MSSI); Pump light power; WDM system;
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