根据高稳定性、低噪声半导体泵浦激光器(DPL激光器)对于激光电源的要求，研制了一台工作电流可达7A、集电流慢启动和过流保护等多重保护于一体的高稳定性LD驱动源，分析了其高稳定性电源的工作原理和影响电流稳定度的主要因素，得到了电流稳定度为2．0×10^－4的高稳定性电流输出。以此激光电源作为高稳定性DPL激光器的LD驱动源，获得了3．5h内功率稳定性小于4‰的激光输出。

Based on the requirement of the DPL laser with high stability and low-noise to laser diode(LD) driver,a high stable LD driver was developed. The LD driver had a maximal current of 7A and slow turn-on protection circuit and current overload protection circuit. The mechanism of highly stable driver and the main factors which may influence the current stability were analyzed. The current stability obtained in the LD driver is 2.0×10^－4. This LD driver was used in a high stable DPL laser. The power stability of the laser is within 4‰ in 3.5 hours.