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为了改善基于半导体光放大器(SOA)中交叉偏振调制效应(CPM)的波长转换器的转换信号码型效应,对交叉偏振调制半导体光放大器波长转换器的工作原理进行了分析;通过讨论交叉偏振调制半导体光放大器波长转换脉冲的上升沿和下降沿的频率啁啾,结合滤波器的透过谱特性,提出了一种利用滤波器的波长正斜率边和波长负斜率边分别对正相转换信号和反相转换信号进行码型优化的方案,并进行了实验验证。在信号码率为10Gb/s的交叉偏振调制半导体光放大器波长转换实验中,采用光带宽为0.3nm的JDS滤波器优化转换信号的波形,基本消除了转换信号中长“1”码和长“0”码的码型效应,并将正相转换信号和反相转换信号的功率代价分别改善了3dB以上。
In order to improve the conversion signal pattern effect of a wavelength converter based on cross-polarization modulation effect (CPM) in a semiconductor optical amplifier (SOA), the working principle of the cross-polarization-modulated semiconductor optical amplifier wavelength converter is analyzed. By discussing the cross-polarization modulation Based on the characteristics of the transmission spectrum of the wavelength conversion pulse of the semiconductor optical amplifier, a new method is proposed which uses the positive slope of the wavelength and the negative slope of the wavelength respectively for the positive phase conversion signal Reverse conversion signal pattern optimization program, and experimental verification. In the experiment of wavelength conversion of a cross-polarization modulated semiconductor optical amplifier with a signal bit rate of 10Gb / s, a JDS filter with an optical bandwidth of 0.3nm is used to optimize the waveform of the converted signal, which basically eliminates the problem that the long “1” code and the long “ 0 ”code pattern, and improve the power cost of the positive phase inversion signal and the inverted phase conversion signal by more than 3dB respectively.