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8 December 2005 Nonlinear phase shift scanning method for the optimal design of Raman transmission systems
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Proceedings Volume 6021, Optical Transmission, Switching, and Subsystems III; 60211C (2005)
Event: Asia-Pacific Optical Communications, 2005, Shanghai, China
We present an efficient algorithm for the search of optimum design parameters and transmission quality factor (Q) for a Raman amplified transmission system. By treating the nonlinear phase shift (NPS) as the key parameter for the determination of secondary system parameters, and then scanning the nonlinear Schrödinger equation (NLSE) to get the optimum Q factor as a function of NPS only, we show that the multi-dimensional, multi-parameter, time-consuming design process can be reduced to a highly efficient semi-analytic, 1 dimensional numerical optimization problem. As an application example for the suggested algorithm, we determine the optimum system design parameters (input powers to SMF, DCF, distributed Raman gain, and forward Raman pumping ratio) and Q factor for a single channel 10 G bit/s 2000 km transmission link (SMF-DCF), and then study the effect of pump-relative-intensity-noise (RIN) and span length change to the optimum Q values and changes in the optimum design point. Results show a Q factor improvement for the system more than 1.16dB / 4.89dB at 100km / 200km span length with our design method, when compared to previous optimization method.
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Jonghan Park, Jaehyoung Park, and Namkyoo Park "Nonlinear phase shift scanning method for the optimal design of Raman transmission systems", Proc. SPIE 6021, Optical Transmission, Switching, and Subsystems III, 60211C (8 December 2005);

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