Improved phase noise tolerance using phase-conjugated OFDM subcarriers

Author

Xingwen Yi ; Dengke Zeng ; Xuemei Chen ; Jing Zhang ; Kun Qiu

Author_Institution

Key Lab. of Opt. FiberSensing & Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2014

fDate

9-10 Nov. 2014

Firstpage

1

Lastpage

4

Abstract

We have recently demonstrated the improved phase noise tolerance in coherent optical OFDM by digital coherent superposition of optical OFDM subcarriers, which are phase-conjugated pairs with Hermitan symmetry. In this approach, we realized DCS of OFDM subcarriers in single polarization (or channel), denoted as SP-DCS-OFDM. In this paper, we show that another approach is in dual polarizations, or DP-DCS-OFDM. We prove that both approaches can reduce the ICI due to phase noise, including laser phase noise and nonlinear phase noise. We discuss their improved phase noise tolerance in simulation. We also discuss their difference in terms of complexity and performance.

Keywords

OFDM modulation; optical fibre communication; optical fibre polarisation; optical modulation; optical phase conjugation; phase noise; Hermitan symmetry; ICI reduction; SP-DCS-OFDM; coherent optical OFDM; dual polarizations; inter-carrier interference; laser phase noise; nonlinear phase noise; phase noise tolerance improvement; phase-conjugated OFDM subcarriers; single polarization; Fiber nonlinear optics; Laser noise; OFDM; Optical fibers; Optical noise; Phase noise; Q-factor;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical Communications and Networks (ICOCN), 2014 13th International Conference on

Conference_Location

Suzhou

Type

conf

DOI

10.1109/ICOCN.2014.6987101

Filename

6987101