为了使激光器能够稳定工作, 设计并实现了一个控制速度快、精度高, 并且可调谐的温度控制系统。该系统使用ATmega328P为处理器, 通过粒子群算法自整定比例-积分-微分(PID)系数, 采用闭环负反馈的PID结构实现对激光器的温度控制。结果表明, 在本系统控制下, 激光器能在15s左右达到目标温度, 且到达目标温度后温度误差约为±0.01℃, 并可保持较长时间, 激光器输出功率波动很小, 方差仅为568.49μW。该系统对蝶形封装激光器的温度可以实现有效的温度控制。

In order to make a laser work stably, a temperature control system with fast control speed, high precision and tunable performance was designed and implemented. ATmega328P was used as the processor in the system. Self-tuning proportional-integral-differential (PID) coefficients was determined by particle swarm optimization. A closed-loop negative feedback PID structure was used to control the temperature of the laser. The results show that, under the control of this system, the laser can reach the target temperature in about 15s. The temperature error after reaching the target temperature is about (±0.01℃). It can be maintained for a long time. The output power of the laser fluctuates very little. The variance is only 568.49μW. The system can effectively control the temperature of butterfly packaging laser.