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对光学互连网络中微弱光信号进行准确检测,可以提高光学互连网络性能。微弱光信号检测方法在检测微弱光信号时受小频率参数和弱信号幅度的约束,存在检测误差大的问题。针对这一情况,提出一种基于随机共振的光学互连网络中微弱光信号检测方法。首先将采集的光学互连网络中的光信号通过锁定放大器的调制,得到与噪声信号分离的待检测微弱光信号,选取调制后的信号与其信号频率相同的信号进行积处理操作,将积处理后的信号送到输入非线性双稳系统进行随机共振处理,利用FFT频谱分析法对随机共振输出信号进行频谱分析,实现对单频信号的恢复,最后依据之前AD转换后的处理系数,对光学互连网络中微弱光信号检测模块恢复的信号进行尺度变换,得到整个系统输入信号的恢复信号。实验仿真证明,本文方法对实际微弱光信号频率的追踪性能良好,提高了微弱光信号的检测精度。
Accurate detection of weak optical signals in the optical interconnection network can improve optical interconnection network performance. Weak optical signal detection method in the detection of weak optical signal by the small frequency parameters and the weak signal amplitude constraints, there is the problem of large detection error. In response to this situation, a stray optical signal detection method based on stochastic resonance in optical interconnection network is proposed. Firstly, the collected optical signal in the optical interconnection network is modulated by a lock-in amplifier to obtain a weak light signal to be detected which is separated from the noise signal, and the signal after the modulation is selected and processed with the signal of the same frequency. After the product is processed Of the signal to the input nonlinear bistable system for stochastic resonance processing, the use of FFT spectral analysis of the stochastic resonance output signal spectrum analysis, to achieve single-frequency signal recovery, and finally based on the previous AD conversion coefficient, the optical interaction Even the weak signal detection module in the network to restore the signal scale conversion to obtain the entire system input signal recovery signal. Experimental simulation results show that the proposed method can track the actual weak optical signals better and improve the detection accuracy of weak optical signals.