Analytical Evaluation of Practical DBP-Based Intra-Channel Nonlinearity Compensators

Author

Gao, G. ; Zhang, Juyong ; Gu, Wanyi

Author_Institution

State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, China

Volume

25

Issue

8

fYear

2013

fDate

15-Apr-13

Firstpage

717

Lastpage

720

Abstract

We derive an analytical expression for the transmission performance of intra-channel nonlinearity compensated and dispersion unmanaged orthogonal frequency-divison multiplexing (OFDM) systems using practical digital back propagation (DBP) with span-length step size. The analytical expression is verified by numerical simulations with evaluation inaccuracy less than 0.4 dB for 1000-km 16-QAM modulated polarization division multiplexed-OFDM transmissions. Using the derived theory, the dependence of performance and optimum nonlinear compensation coefficient on system parameters is identified. The limitation of processing bandwidth on the performance improvement using practical intra-channel DBP is also investigated. Analytical results show that for achieving 1-dB improvement on maximum $Q^{2}$ factor, the processing signal bandwidth of span-length step size DBP should be within 55 GHz for 2000-km SSMF transmissions over 62.5-km spans.

Keywords

Bandwidth; Optical fiber amplifiers; Optical fiber communication; Optical fiber dispersion; Optical fiber polarization; Coherent; digital back propagation; fiber nonlinearity compensation; optical fiber communication;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2013.2247753

Filename

6470642