Title :
1-Tb/s Single-Channel Coherent Optical OFDM Transmission With Orthogonal-Band Multiplexing and Subwavelength Bandwidth Access
Author :
Ma, Yiran ; Yang, Qi ; Tang, Yan ; Chen, Simin ; Shieh, William
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Melbourne, Parkville, VIC, Australia
Abstract :
A 1-Tb/s single-channel coherent optical OFDM (CO-OFDM) signal consisting of continuous 4104 spectrally-overlapped subcarriers is generated using a recirculating frequency shifter (RFS). Theoretical and experimental analysis of the RFS is performed to study its effectiveness in extending OFDM bandwidth. In particular, the RFS produces a 320.6-GHz wide frequency comb from a single laser with superior flatness and tone-to-noise ratio (TNR). The 1-Tb/s CO-OFDM signal is consisted of 36 uncorrelated orthogonal bands achieved by adjusting the delay of the RFS to an integer number of OFDM symbol periods. The 1-Tb/s CO-OFDM signal with a spectral efficiency of 3.3 bit/s/Hz is successfully received after transmission over 600-km SSMF fiber without either Raman amplification or dispersion compensation.
Keywords :
OFDM modulation; optical fibre networks; CO-OFDM signal; OFDM bandwidth; SSMF fiber; orthogonal-band multiplexing; recirculating frequency shifter; single-channel coherent optical OFDM transmission; spectral efficiency; subwavelength bandwidth access; tone-to-noise ratio; uncorrelated orthogonal bands; wide frequency comb; Coherent communications; orthogonal frequency-division multiplexing; polarization diversity; quadrature amplitude modulation; recirculating frequency shifter;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2009.2030517
