半导体光放大器参数对高速全光波长变换系统的影响

Influence of Semiconductor Optical Amplifier Parameters on High Speed All-Optical Wavelength Conversion System

理论分析并模拟仿真了半导体光放大器(SOA)参数对高速偏振复用-正交频分复用(PM-OFDM)全光波长变换系统的影响。SOA参数(包括增益饱和、光场限制因子、有源区内载流子浓度)均与系统波长转换效率有关。在达到SOA的增益饱和之前或在SOA的增益饱和附近,通过改变注入电流、载流子浓度、光场限制因子均可引起SOA增益系数的改变,从而影响系统的波长转换效率。通过改善SOA参数,实现了速率为40 Gbit/s的PMOFDM信号在全光波长变换后的无串扰直接接收。

The influences of semiconductor optical amplifier parameters on all-optical wavelength conversion system with high speed polarization multiplexing-orthogonal frequency division multiplexing （PM-OFDM） are analyzed and simulated. The SOA parameters, such as gain saturation, optical confinement factor and carrier concentration in active region, are related to the wavelength conversion efficiency. Before achieving SOA gain saturation or nearby SOA gain saturation, the injection current, the carrier concentration, and the optical confinement factor effect on the SOA gain coefficient changing, and ultimately effect the wavelength conversion efficiency. The PM-OFDM signal with the rate of 40 Gbit/s is achieved directly without crosstalk after all-optical wavelength conversion when we improve the SOA parameters.