中文摘要：

为了扩大应变测量的范围,提出了使用两个分布反馈式（DFB）激光器作为光时域反射-光纤光栅（OTDR-FBG）传感系统的光源的方法,并设计了相应的纳秒脉冲驱动电路和温控电路,得到两个激光器的驱动脉冲宽度分别为3.10ns和3.18ns,脉冲幅值分别为4.40V和4.08V,温度控制电路精度达到±0.04℃。经测试得到的纳秒脉冲和温控精度满足OTDR-FBG传感系统的要求。

英文摘要：

To expand the range of strain measurement,a new method is proposed by using two distributed feedback（DFB） lasers as light source of optical time domain reflectometry-fiber Bragg grating（OTDR-FBG） sensing system.The corresponding nanosecond pulse driving circuits and the temperature control circuits are also designed.The driving pulse widths of two lasers are 3.10 ns and 3.18 ns,and the pulse amplitudes are 4.40 V and 4.08 V,respectively.The temperature control circuits have the accuracy of ±0.04 ℃.According to the measurement,the nanosecond pulses and temperature control accuracy can meet the requirements of OTDR-FBG sensor system.