中国激光, 2015, 42 (6): 0602002, 网络出版: 2022-09-23
大口径轴向非均匀Nd∶YAG晶体抽运设计
Pump Design of Large-Diameter Axial Non-Uniform Nd:YAG Crystal
摘要
通过抽运结构的优化设计,对YAG 晶体的轴向吸收系数非均匀特性进行了补偿,实现了直径15 mm Nd∶YAG晶体的轴向高均匀抽运。分析了轴向非均匀晶体吸收系数的影响,提出在控制抽运光中心波长的基础上,通过改变结构参数来补偿轴向吸收系数不均匀导致的抽运不均匀的方法。实验验证了轴向吸收系数为2.343~2.882 cm-1的Nd∶YAG 棒的均匀抽运优化方案。
Abstract
By optimizing the pump structure, the axially non-uniform absorption coefficient of YAG crystal is compensated. A 15 mm diameter Nd∶YAG crystal is uniformly pumped. The effect of axially non-uniform absorption coefficient of Nd∶YAG on the uniform pumping is analyzed. Then a new method that can optimize the gain distribution through the modulation of the distance and the central pump wavelength is given. A side-pumped amplifier structure is designed to verify the simulation results by experiment. The scheme used for obtaining uniform gain distribution for Nd∶YAG rod with axially absorption coefficient with range of 2.343~2.882 cm-1 has been proved experimentally.
肖红, 赵天卓, 樊仲维, 黄科, 余锦. 大口径轴向非均匀Nd∶YAG晶体抽运设计[J]. 中国激光, 2015, 42(6): 0602002. Xiao Hong, Zhao Tianzhuo, Fan Zhongwei, Huang Ke, Yu Jin. Pump Design of Large-Diameter Axial Non-Uniform Nd:YAG Crystal[J]. Chinese Journal of Lasers, 2015, 42(6): 0602002.