Title :
40 Gb/s Single R-SOA Transmission by Optical Equalization and Adaptive OFDM
Author :
Cossu, G. ; Bottoni, F. ; Corsini, R. ; Presi, M. ; Ciaramella, E.
Author_Institution :
Inst. of Technol. for Commun. Inf. & Perception, Scuola Superiore Sant´Anna Univ., Pisa, Italy
Abstract :
We report the first demonstration of a 40 Gb/s orthogonal frequency division multiplexing (OFDM) optical system exploiting a common 1 GHz bandwidth R-SOA and direct detection. To this aim, we combined the use of two techniques, i.e., the adaptive OFDM signaling and the optical equalization. Adaptive OFDM (with optimized bit- and power-loading) allowed us to increase the spectral efficiency and the resilience to chromatic dispersion. Optical equalization was obtained by the interplay between the chirped signal produced by the reflective semiconductor optical amplifiers (R-SOA) and a detuned WDM demultiplexer. This allowed us to increase the useful channel bandwidth to > 10 GHz. By this combination and using state of the art A/D and D/A converters, a 40 Gb/s signal is successfully transmitted over a 26 km SMF optical ring.
Keywords :
OFDM modulation; equalisers; next generation networks; optical fibre subscriber loops; optical transmitters; semiconductor optical amplifiers; wavelength division multiplexing; A/D converters; D/A converters; SMF optical ring; adaptive OFDM; bit rate 40 Gbit/s; channel bandwidth; chirped signal; chromatic dispersion resilience; detuned WDM demultiplexer; next generation optical access networks; optical equalization; orthogonal frequency division multiplexing; reflective semiconductor optical amplifiers; single R-SOA transmission; spectral efficiency; Bandwidth; OFDM; Optical fibers; Optical receivers; Optical transmitters; Passive optical networks; Signal to noise ratio; OFDM; WDM passive optical networks; reflective semiconductor optical amplifiers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2013.2282001
