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为了实现对半导体激光器的注入电流和工作温度的高稳定控制,本文研究和设计了一种高稳定的半导体激光器驱动电源系统。整个系统包括恒流源驱动电路、温度控制电路、保护电路和单片机四大部分,采用了电流串联的负反馈技术和数字PID控制算法来控制半导体激光器的电流和温度,并且对系统进行了性能测试。实验结果表明,电流在1小时之内的稳定度达到了0.0123%,温度偏差低于0.0046℃,能够满足预期指标,具有较好的应用价值。
In order to realize high stability control of the injection current and operating temperature of the semiconductor laser, a high stability semiconductor laser driving power system is researched and designed. The whole system includes the constant current source driver circuit, the temperature control circuit, the protection circuit and the SCM four parts, using the current series negative feedback technology and digital PID control algorithm to control the semiconductor laser current and temperature, and the system performance testing . The experimental results show that the stability of the current in 1 hour reaches 0.0123% and the temperature deviation is less than 0.0046 ℃, which can meet the expected index and has good application value.