Digital Back Propagation With Optimal Step Size for Polarization Multiplexed Transmission

A digital back propagation (DBP) scheme with optimal step size for polarization division multiplexed transmission system is proposed. For a fixed number of steps in DBP, the optimum step size is calculated by minimizing the mismatch between the area under the exponentially increasing nonlinearity pr...

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Bibliographic Details
Published in:IEEE photonics technology letters 2013-12, Vol.25 (23), p.2327-2330
Main Authors: Jing Shao, Kumar, Shiva, Xiaojun Liang
Format: Article
Language:English
Subjects:
chromatic dispersion (CD)
Digital backward propagation
Equations
Least squares approximations
Manakov equations
Mathematical model
nonlinear effect
Optical fiber amplifiers
Optical fiber dispersion
Optical fiber polarization
vector NLSE
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Summary:A digital back propagation (DBP) scheme with optimal step size for polarization division multiplexed transmission system is proposed. For a fixed number of steps in DBP, the optimum step size is calculated by minimizing the mismatch between the area under the exponentially increasing nonlinearity profile and its stepwise approximation. In simulations, the vector nonlinear Schòˆdinger equation or Manakov equations are used for forward propagation and Manakov equations are used for backward propagation. The simulation results show that the proposed scheme using the optimum step size outperforms that using the uniform step size at the same computational cost.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2013.2286151