Real-time experimental demonstration of optical OFDM symbol synchronization in directly modulated DFB laser-based 25km SMF IMDD systems | Zendy

Xianqing Jin | Zendy; R. P. Giddings | Zendy; E. Hugues-Salas | Zendy; Jianming Tang | Zendy

Open Access

Real-time experimental demonstration of optical OFDM symbol synchronization in directly modulated DFB laser-based 25km SMF IMDD systems

Author(s) -

Xianqing Jin,

R. P. Giddings,

E. Hugues-Salas,

Jianming Tang

Publication year - 2010

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.18.021100

Subject(s) - optics , computer science , orthogonal frequency division multiplexing , synchronization (alternating current) , modulation (music) , intensity modulation , symbol rate , quadrature amplitude modulation , transmission (telecommunications) , electronic engineering , phase modulation , bit error rate , phase noise , physics , algorithm , telecommunications , decoding methods , channel (broadcasting) , acoustics , engineering

A simple optical OFDM (OOFDM) synchronization technique utilizing subtraction and Gaussian windowing at the symbol rate is proposed and implemented in FPGA-based OOFDM receivers. End-to-end real-time symbol synchronization of 128-QAM-encoded OOFDM signals at raw bit rates of 6.56Gb/s is experimentally demonstrated, for the first time, over directly modulated DFB laser-based 25km SMF intensity modulation and direct detection (IMDD) systems. Experimental investigations show that the proposed synchronisation technique offers a number of salient advantages including low complexity, fast tracking speed, high accuracy and suitability for high-capacity optical transmission systems.

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