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由于半导体光放大器(SOA)的增益饱和效应,在波分复用系统中,每个信道的增益受到复用的其它信道的影响。SOA引起的各信道之间的串扰严重限制了其应用。理论研究了SOA增益饱和效应引起的信道间串扰,数值模拟了多路信道复用时系统的误码率随复用信道数和光功率的变化情况,发现随着复用信道数的增加SOA增益饱和引起的信道间串扰越来越严重。对SOA中串扰的抑制方法进行了理论和实验研究,数值模拟发现连续光注入可以抑制输出功率的波动,从而减小误码率,当复用10个信道时,连续光注入可以使功率代价减小2 dB;实验验证了两信道的40 Gb/s系统中,注入连续光可以减少SOA引起的信道间串扰。
Due to the gain saturation effect of semiconductor optical amplifiers (SOA), the gain of each channel in the wavelength division multiplexing system is affected by the other channels that are multiplexed. The crosstalk between channels caused by SOA severely limits its application. Theoretical study of the SOA gain saturation effect caused by inter-channel crosstalk, the numerical simulation of the multiplex channel multiplexing bit error rate with the multiplexing channel number and optical power changes and found that as the number of multiplexed channels increased SOA gain saturation The crosstalk caused by the channel is more and more serious. The theoretical and experimental studies on the suppression of crosstalk in SOA are carried out. Numerical simulation shows that continuous light injection can suppress the fluctuation of output power and reduce the bit error rate. When 10 channels are multiplexed, continuous light injection can reduce power cost Small 2 dB. Experiments demonstrate that in a two-channel 40 Gb / s system, the injection of continuous light can reduce the inter-channel crosstalk caused by SOA.