分布式光纤温度传感器APD最佳倍增因子的分析

Analysis of the optimum gain of APD in distributed fiber temperature sensors

本文分析了分布式光纤温度传感器中光电接收用雪崩光电二极管倍增因子对接收信号的信噪比的影响，给出依据使传感系统光电接收电路输出信号信噪比最大这一最佳意义下ＡＰＤ雪崩因子的表达式，并对此结果进行了分析。

We present an analysis of the anti-Stokes in Raman backscatter for fiber temperature sensors to quantify the effect of varying the gain of the avalanche photodiode. An optimal gain was found based on maximising the SNR of the received circuit output.