APSK Modulated CO-OFDM System With Increased Tolerance Toward Fiber Nonlinearity

Author

Wang, Hui ; Li, Yan ; Yi, Xiaogang ; Kong, Deming ; Wu, Jian ; Lin, Jintong

Author_Institution

State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China

Volume

24

Issue

13

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

1085

Lastpage

1087

Abstract

An amplitude and phase-shift keying (APSK) modulated coherent optical orthogonal frequency-division-multiplexing (CO-OFDM) system is proposed, with increased tolerance toward fiber nonlinearity. Numerical simulation results, based on 30.2-Gb/s single-channel and 5×30.2-Gb/s wavelength-division-multiplexing (WDM) single-polarization CO-OFDM systems, show that compared with conventional 16 quadrature amplitude modulation (QAM) modulated optical OFDM signal, the 16 APSK modulated optical OFDM signal has a higher tolerance toward fiber nonlinearity, such as self-phase modulation and cross-phase modulation. The optimal launch power and the corresponding Q² factor are, respectively, 2 and 0.5 dB higher than 16 QAM modulated optical OFDM signal after 640-km transmission, both in single-channel and WDM CO-OFDM systems.

Keywords

OFDM modulation; amplitude shift keying; optical fibre communication; quadrature amplitude modulation; APSK modulated CO-OFDM system; amplitude phase-shift keying; coherent optical orthogonal frequency-division-multiplexing system; cross-phase modulation; fiber nonlinearity; optimal launch power; quadrature amplitude modulation; self-phase modulation; single-channel; Fiber nonlinear optics; Modulation; Optical fibers; Peak to average power ratio; Amplitude and phase-shift keying (APSK); fiber nonlinearity; orthogonal frequency-division-multiplexing (OFDM); quadrature amplitude modulation (QAM);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2012.2194733

Filename

6184286