Optimized digital backward propagation for phase modulated signals in mixed-optical fiber transmission link

被引：33
作者：
Asif, Rameez [1 ,2 ]
Lin, Chien-Yu [1 ,2 ]
Holtmannspoetter, M. [1 ,2 ]
Schmauss, Bernhard [1 ,2 ]
机构：
[1] Univ Erlangen Nurnberg, Chair Microwave Engn & High Frequency Technol LHF, D-91058 Erlangen, Germany
[2] Erlangen Grad Sch Adv Opt Technol SAOT, D-91052 Erlangen, Germany
来源：
OPTICS EXPRESS | 2010年 / 18卷 / 22期
基金：
美国国家科学基金会;
关键词：
RESPONSE FILTERING METHOD; IMPAIRMENT COMPENSATION; COHERENT DETECTION; DISPERSION; PREDISTORTION;
D O I：
10.1364/OE.18.022796
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The parametric optimization of Digital Backward Propagation (DBP) algorithm for mitigating fiber transmission impairments is proposed and numerically demonstrated for phase modulated signals in mixed-optical fiber transmission link. The optimization of parameters i.e. dispersion (D) and non-linear coefficient (gamma) offer improved eye-opening (EO). We investigate the optimization of iterative and non-iterative symmetric split-step Fourier method (S-SSFM) for solving the inverse non-linear Schrodinger equation (NLSE). Optimized DBP algorithm, with step-size equal to fiber module length i.e. one calculation step per fiber span for obtaining higher computational efficiency, is implemented at the receiver as a digital signal processing (DSP) module. The system performance is evaluated by EO-improvement for diverse in-line compensation schemes. Using computationally efficient non-iterative symmetric split-step Fourier method (NIS-SSFM) upto 3.6dB referenced EO-improvement can be obtained at 6dBm signal launch power by optimizing and modifying DBP algorithm parameters, based on the characterization of the individual fiber types, in mixed-optical fiber transmission link. (C) 2010 Optical Society of America
引用
收藏
页码：22796 / 22807
页数：12
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