高稳定大功率半导体激光器驱动电源的研究

Research of High Stability and High-Power Semiconductor Laser Driving Power Supply

大功率半导体激光器具有体积小、质量轻、效率高等特性,广泛应用于光通信、激光加工、激光显示等领域。大功率半导体激光器输出功率稳定性依赖于驱动电源的电流稳定性。基于电流负反馈电路原理,实现对大功率半导体激光器驱动电源的恒流控制,理论分析了影响驱动电源输出电流长期稳定性的主要因素,实验采用高精度电压基准源、低温漂采样电阻、水冷散热器等稳定措施,设计了输出电流在0~12 A之间连续可调的驱动电源,当输出电流为12 A时,10 h内电流稳定度达到66.7×10-6。同时,该驱动电源还具有延时启动、限流保护、短路保护等功能,完全能够满足大功率半导体激光器长时间稳定运行的要求。

High-power semiconductor lasers are widely used in optical communication,laser processing,laser display,and other fields because of their small size,light weight,and high efficiency.The output power stability of high-power semiconductor laser depends on the current stability of the driving power supply.Based on the current negative feedback circuit principle,this paper realizes the constant current control of the high-power semiconductor laser drive power supply,theoretically analyzes the main factors affecting the long-term stability of the output current of the drive power supply,and experimentally adopts highprecision voltage reference source,low-temperature drift sampling resistance,water cooling sink and so on.A driving power supply with continuously adjustable output current between O and 12 A is designed.When the output current is 12 A,the current stability reaches 66.7X10-6 within 10 h.At the same time,the drive power supply with delayed start,current limiting protection,short circuit protection,and other functions,can fully meet the requirement of the stable operation during a long time for the high-power semiconductor laser.