实验验证了在半导体光放大器(SOA)中基于四波混频(FWM)效应的单抽运、垂直双抽运和平行双抽运对光正交频分复用(OFDM)信号波长变换特性。信号光源经2.5 Gb/s OFDM电信号直接调制后和抽运光耦合,经光放大器后在SOA中实现波长变换。实验结果显示,经SOA的FWM效应后,产生新波长的信号光将携带OFDM信号。实验测量了转换的OFDM信号的误码特性曲线图和星座图,结果表明,平行双抽运模型的系统功率代价最小。实验结果与理论分析是一致的。

We experimentally demonstrate three schemes of pumping including single pump,orthogonal-dual-pump and copolarized-dual-pump based on four-wave mixing (FWM) in semiconductor optical amplifier (SOA) for the wavelength conversion of optical amplifier (OFDM) signals. In experiment,the signal continuous-wave (CW) lightwave is modulated directly by 2.5 Gb/s OFDM. The modulated signal lightwave and pump light are coupled and then amplified before they are injected into the SOA for wavelength conversion. Experimental results show that the newly converted wavelength signals carry the original OFDM signals. The bit error rate (BER) curves and received constellations are also measured by experiment,the experimental results show that the copolarized-dual-pump configuration has the smallest system power penalty,which agree well with the theoretical analyses.