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Updated: Jun 8, 2026
Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
Published on: March 20, 2017
Real-time experimental demonstration of optical OFDM symbol synchronization in directly modulated DFB laser-based
X Q Jin1, R P Giddings, E Hugues-Salas
1School of Electronic Engineering, Bangor University, Dean Street, Bangor, LL57 1UT, UK. x.jin@bangor.ac.uk
Abstract:
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.
