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多功能微分器可以满足光计算和光信号处理中的多种需求,增强灵活性.本文从理论上推导了一种基于相位调制和线性滤波的多功能光学微分器.并在实验中,将传输谱线近似为线性的光纤延时干涉仪(DI)和相位调制器级联,得到了输入信号的两种微分结果.通过调节DI的驱动电压调节其传输谱的漂移,当光载波位于DI的传输谱线的谷值,则获得信号的光场微分,当光载波位于DI传输谱的线性斜率处,则得到输入信号的光强微分.通过分析各种微分的平均误差,发现DI的线性度越高,平均误差越小.同时基于DI传输谱线的梳状特性,证实了多信道信号的同时微分.
The multi-function differentiator can meet various needs in light calculation and optical signal processing, and enhances the flexibility.In this paper, a multifunctional optical differentiator based on phase modulation and linear filtering is theoretically derived.In the experiment, the transmission spectrum Line approximation to a linear fiber delay interferometer (DI) and the phase modulator cascade, obtained two differential results of the input signal by adjusting the drive voltage of the DI to adjust its transmission spectrum drift, when the optical carrier is located in the DI transmission When the light carrier is located at the linear slope of the transmission spectrum of DI, the light intensity differential of the input signal is obtained. By analyzing the average error of various differentials, it is found that the linearity of DI High and the average error is smaller.At the same time, based on the comb characteristic of the transmission line of DI, simultaneous differential of multi-channel signals is confirmed.