All optical sampling orthogonal frequency division multiplexing systems

Author

Hongwei Chen ; Xingyao Gu ; Minghua Chen ; Shizhong Xie

Author_Institution

Dept. of Electron. Eng., Tsinghua Univ., Beijing, China

fYear

2010

fDate

24-27 Oct. 2010

Firstpage

120

Lastpage

124

Abstract

A novel all-optical sampling orthogonal frequency division multiplexing (AOS-OFDM) scheme with optical cyclic postfixes (OCP) inserted is proposed and demonstrated. Ultra short pulses are used as optical samples and processed by forward and inverse discrete Fourier transform (DFT/IDFT) modules in optical domain. Optical CPs can be added in the proposed optical DFT modules, which can eliminate optical gates and simplify the receiver structure. In this scheme, high speed real-time OFDM system can be realized without limitation of electronic digital processing. AOS-OFDM system is suitable for different modulation formats, and it has better spectral efficiency and dispersion tolerance than traditional single-carrier optical systems. Compared to coherent OFDM system, it has better fiber nonlinearity tolerance for the low peak to average power ratio (PAPR) induced with fewer sub-carriers.

Keywords

OFDM modulation; discrete Fourier transforms; high-speed optical techniques; optical fibre dispersion; optical modulation; optical receivers; real-time systems; spectral analysis; AOS-OFDM scheme; AOS-OFDM system; DFT/IDFT modules; OCP; PAPR; all optical sampling orthogonal frequency division multiplexing systems; all-optical sampling orthogonal frequency division multiplexing; coherent OFDM system; dispersion tolerance; electronic digital processing; fiber nonlinearity tolerance; forward discrete Fourier transform; high speed real-time OFDM system; inverse discrete Fourier transform; optical DFT modules; optical cyclic postfixes; optical domain; optical gates; optical samples; peak to average power ratio; receiver structure; single-carrier optical systems; spectral efficiency; ultra short pulses; All optical sampling; orthogonal frequency division multiplexing; real-time system;

fLanguage

English

Publisher

iet

Conference_Titel

Optical Communications and Networks (ICOCN 2010), 9th International Conference on

Conference_Location

Nanjing

Type

conf

DOI

10.1049/cp.2010.1167

Filename

5778429