论文部分内容阅读
分析了高速OCDM系统中基于非线性光学环境(NOLM)和非线性放大(NALM)环境的全光阈值技术。考虑了NOLM环境输入脉冲峰值功率对其阈值判决功能的影响,数值模拟了由高非线性光纤构成的NOLM和NALM环境的脉冲整形和旁瓣抑制功能,并和实验结果进行了比较。结果表明基于NOLM和NALM环境的全光阈值技术都能有效地抑制40 Gbit/s的OCDM系统中的干扰噪声,最优的NOLM环境的脉冲峰值输入功率为2 W,而NALM环境只需要mW量级的脉冲峰值输入功率即能够更好地抑制干扰噪声。
The all-optical threshold technique based on nonlinear optical environment (NOLM) and non-linear amplification (NALM) is analyzed in high speed OCDM system. Considering the impact of the input pulse peak power on the threshold decision function in the NOLM environment, the pulse shaping and sidelobe suppression of the NOLM and NALM environments are numerically simulated and compared with the experimental results. The results show that the all-optical threshold technique based on NOLM and NALM environments can effectively suppress the interference noise in the 40 Gbit / s OCDM system. The optimal NOLM environment has a peak input power of 2 W, whereas the NALM environment only requires an amount of mW Pulsed peak input power level is better to suppress interference noise.