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Transmission of Four Channels SCM Over Fiber and Nonlinear Compensation for RSOA External Modulators

Liu, Z. ; Violas, M. ; Carvalho, N.B.C.

Transmission of Four Channels SCM Over Fiber and Nonlinear Compensation for RSOA External Modulators, Proc IEEE GLOBECOM Workshops: Distributed Antenna Systems for Broadband Mobile Communication, Houston, United States, Vol. -, pp. 1 - 5, December, 2011.

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Abstract
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.