分布反馈激光器温度与电流控制研究

为了精密控制分布反馈激光器的温度与电流,采用数字信号处理芯片,设计了分布反馈激光器驱动装置.通过该装置设定激光器温度和电流的参考电压,经数模转换,再通过温度和电流驱动模块,馈入并驱动分布反馈激光器,进行了实验验证.结果表明,40min内温度变化极差与标准差分别不超过5mK和0.7mK,电流变化极差与标准差不超过40μA和6μA;驱动半导体光放大器,关断时间小于1μs,具有良好的瞬间响应特性;该装置具有较高的温度和电流稳定性,流控模块具有良好的瞬态特性,能够精密控制分布反馈激光器的温度和电流.该控制装置可用于光腔衰荡光谱研究,控制分布反馈激光器并驱动光放大器来关断激光.

Study on temperature and current control of distributed feedback laser diodes

In order to precisely control the temperature and current of distributed feedback lasers, the drive device of distributed feedback laser was designed by using digital signal processing chip.The device was used to set the reference voltage of the current and the temperature of the laser. After digital-to-analog conversion, through the temperature and current driving module, the reference voltage and the temperature were fed into the distributed feedback laser. And then, the device was used to drive distributed feedback lasers and experiments were carried out to verify the results. The results show that, within 40min, the temperature variation range and the standard difference are no more than 5mK and 0.7mK, respectively. The current variation range and the standard deviation are not more than 40μA and 6μA. When driving the semiconductor optical amplifier, the turn-off time is less than 1μs. The device has good instantaneous response characteristics and high temperature and current stability. The flow control module has good transient characteristics and can precisely control the temperature and current of distributed feedback lasers. The control device can be used to study optical cavity ring-down spectroscopy. It can controll distributed feedback lasers and drive the optical amplifiers to turn off the lasers.