| 1. | In the design of optical system , to improve system precision , the fiber optic coupler is added to make a laser pulse circle ; in the unit of photo detection , we make a high - precision temperature compensation apd bias circuit , which allows system to abate the noise caused by temperature changer and dark current
应变测量系统主要由光源、传感光纤、光电探测器和信号处理电路组成。在光学系统设计中为提高系统的精度采用了光纤定向耦合器实现光脉冲的循环；在光电转换单元上采用高精度温度补偿的apd偏置电路，减小了温度和暗电流带来的噪声干扰。 |
