Open AccessPower-efficient method for IM-DD optical transmission of multiple OFDM signals
Author(s) -
Frank Effenberger,
Xiang Liu
Publication year - 2015
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.23.013571
Subject(s) - orthogonal frequency division multiplexing , intensity modulation , frequency division multiplexing , modulation (music) , clipping (morphology) , transmission (telecommunications) , multiplexing , electronic engineering , computer science , optics , optical wireless , optical power , optical carrier transmission rates , optical fiber , channel (broadcasting) , wireless , physics , telecommunications , phase modulation , radio over fiber , engineering , phase noise , acoustics , laser , linguistics , philosophy
We propose a power-efficient method for transmitting multiple frequency-division multiplexed (FDM) orthogonal frequency-division multiplexing (OFDM) signals in intensity-modulation direct-detection (IM-DD) optical systems. This method is based on quadratic soft clipping in combination with odd-only channel mapping. We show, both analytically and experimentally, that the proposed approach is capable of improving the power efficiency by about 3 dB as compared to conventional FDM OFDM signals under practical bias conditions, making it a viable solution in applications such as optical fiber-wireless integrated systems where both IM-DD optical transmission and OFDM signaling are important.