Transmission of four channels SCM over fiber and nonlinear compensation for RSOA external modulators

• Published in: 2011 IEEE GLOBECOM Workshops (GC Wkshps) pp. 147 - 151
• Main Authors: Zhansheng Liu, Violas, M. A., Carvalho, N. B.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-12-2011
• Subjects: Digital predistortion (DPD); distributed antenna systems (DAS); Modulation; Nonlinear distortion; Optical fiber amplifiers; Optical fiber communication; Optical fiber devices; Radio frequency; radio over fiber (RoF); reflective semiconductor optical amplifier (RSOA); subcarrier multiplexing (SCM)
• ISBN: 9781467300391; 146730039X
• ISSN: 2166-0077; 2166-0077
• DOI: 10.1109/GLOCOMW.2011.6162425

We experimentally demonstrate the transmission performance of subcarrier multiplexing (SCM) over fiber, where a bulk reflective semiconductor optical amplifier (RSOA) is used as an external modulator. Each subcarrier has the bandwidth around 80 MHz, carrying data rate with 480 Mbps using 64 QAM and 2048 IFFT OFDM. The nonlinear distortion of RSOA external modulator significantly limits the transmission of large signals. A digital predistortion based compensation strategy is also presented for a single carrier case.