为了提高传统线性半导体激光器电源的电能转换效率、输出电流的动态响应以及对负载电压的自适应能力,采用两相两重斩波变换技术,设计了一种半导体激光器用2kW直流驱动电源.测试并分析了该电源在激光系统中的静态特性、动态特性以及两相两重斩波变换电流源的效率.结果表明,电源对负载电压自适应能力强,具有较好的矩形输出特性;直接驱动激光二极管模块时,该电流源的电能转换效率高达93%,输出电流0A~100A的上升、下降时间仅为0.5ms,电流纹波系数小于0.03%.

In order to improve the power conversion efficiency,dynamic response of the output current and the load voltage adaptability of a traditional linear laser diode driver,a 2kW laser diode driver was designed based on double-phase dual chopping conversion.The static and dynamic characteristics of laser diode driver were tested and analyzed.The power efficiency of the double-phase dual chopping conversion current source was measured.The results show that the power system has good adaptability to the load and outputs rectangular waveforms.The power conversion efficiency of the current source is up to 93% when driving laser diode modules directly.Typical rise and fall time of output current in the range of 0A~100A is approximately 0.5ms.Current ripple factor is less than 0.03%.