All-Optical Sampling Orthogonal Frequency-Division Multiplexing Scheme for High-Speed Transmission System

Author

Chen, Hongwei ; Chen, Minghua ; Xie, Shizhong

Author_Institution

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

Volume

27

Issue

21

fYear

2009

Firstpage

4848

Lastpage

4854

Abstract

A novel high spectral efficiency all-optical sampling orthogonal frequency-division multiplexing (AOS-OFDM) scheme with optical cyclic postfixes (OCPs) inserted is proposed. Ultrashort pulses are used as optical samples and processed by all optical discrete Fourier transformers based on fiber Bragg gratings (FBGs) technique. This scheme includes five subcarrier channels with 20 Gb/s differential quadrature phase-shift keying (DQPSK) modulation of each channel. So, the total bit rate is 100 Gb/s. The spectral efficiency is higher than 1.4. Furthermore, with the help of OCPs, the dispersion tolerance of this 100 Gb/s AOS-OFDM system increases to more than 300 ps/nm, which is much higher than a traditional 100 Gb/s DQPSK system.

Keywords

Bragg gratings; Fourier transform optics; OFDM modulation; discrete Fourier transforms; high-speed optical techniques; optical fibre communication; optical fibre dispersion; optical modulation; quadrature phase shift keying; sampling methods; telecommunication channels; FBG technique; all optical discrete Fourier transformer; all-optical sampling OFDM scheme; bit rate 100 Gbit/s; bit rate 20 Gbit/s; differential quadrature phase-shift keying; dispersion tolerance; fiber Bragg grating; high-spectral efficiency AOS-OFDM; high-speed transmission system; optical cyclic postfixes; orthogonal frequency-division multiplexing; subcarrier channel; ultrashort pulse; Cyclic postfix (CP); optical sampling; orthogonal frequency multiplexing;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2009.2029063

Filename

5191092