光电二极管在光栅解调电路中的应用

Application of Photodiode Used in Circuit of Fiber Grating Demodulation

在对光电二极管施加5 V偏置电压的情况下,对于其接收的不同强度的光信号,采用不同的负载电阻而输出的电信号进行了大量实验。实验表明:不同强度的光信号以及不同阻值的负载电阻对其输出信号均有影响,给出了确切的数据和形象的曲线。可以得出结论:在光栅解调电路中,对于确定的光路,可以通过实验找到最佳负载电阻,从而便于实现对外界物理量的测量。

A lot of experiments detecting the photodiode＇ s electrical output signal were completed, when the photodiode was given the reverse voltage of 5 V and received the optical signals of different intensity. The experiments indicate the output signals are affected by the intensity of the optical signal and the size of the load resistance. The exact data and visual curves were presented. The conclusion can be achieved that the best load resistance can be got in the circuit of the fiber grating demodtdation through the experiments for the determined optical path, it is easier to measure the outside physical parameters.