在高功率激光二极管阵列(LDA)侧面抽运模块研究中,高效率高质量的抽运耦合结构设计非常重要。为了对抽运耦合结构进行优化设计,需要对棒状增益介质内的抽运储能分布实现量化评价。由于用于激光谐振腔和放大光路的激光二极管抽运模块的抽运储能分布要求不同,因此对激光振荡模块和放大模块中的抽运储能分布分别建立了一套评价方法。分别对激光振荡模块和放大模块中的抽运储能分布进行实例评价分析,结果表明,所提出的评价指标和计算方法既能充分反映出放大模块中抽运储能分布的储能沉积效率和抽运均匀性变化情况,也能反映出激光振荡模块中抽运储能分布与谐振腔模分布的匹配程度。

In laser diode array (LDA) side-pumped module,coupling system with high efficiency and optimized pump distribution is very important. To evaluate different coupling systems,evaluating specifications are put forward. Because different requirements are put on LDA side-pumped modules used in laser oscillator and as amplifiers,different specifications are set up for laser modules and amplifier modules. Calculating results of different pumping intensity distributions of laser modules and amplifier modules show that these specifications can not only show pump depositing efficiency and uniformity of the intensity distribution in the gain modules,but also the matching degree between pump intensity distribution in the laser module and laser oscillating modes.