Mitigation of nonlinearity based on optimized percentage of dispersion pre-compensation in coherent optical PDM-OFDM systems

Author

Shengjiao Cao ; Changyuan Yu ; Pooi-Yuen Kam

Author_Institution

Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore

fYear

2012

fDate

13-16 Dec. 2012

Firstpage

1

Lastpage

5

Abstract

The one-step nonlinearity compensation method, i.e., nonlinear phase rotation (NPR), is shown to be affected by the amount of pre-compensated dispersion for coherent optical OFDM system with a dispersion unmanaged link. It is observed that NPR plus optimal percentage, around 50%, of dispersion pre-compensation is performing better than 1-step digital back-propagation (BP), with the same computational complexity. The optimized scheme results in a 2-dBm improvement in optimal launch power as well as 1.75-dB improvement in optimal signal quality compared to 1-step BP after 800-km transmission at the bit rate of 20 Gb/s.

Keywords

OFDM modulation; optical communication; optical modulation; NPR; back-propagation; bit rate 20 Gbit/s; dispersion precompensation; dispersion unmanaged link; nonlinear phase rotation; nonlinearity compensation method; nonlinearity mitigation; optical PDM-OFDM system; signal quality; Nonlinear optics; OFDM; Optical fiber dispersion; Optical fiber polarization; Optical transmitters; coherent optical OFDM; dispersion pre-compensation; nonlinear phase rotation;

fLanguage

English

Publisher

ieee

Conference_Titel

Photonics Global Conference (PGC), 2012

Conference_Location

Singapore

Print_ISBN

978-1-4673-2513-4

Type

conf

DOI

10.1109/PGC.2012.6457974

Filename

6457974