激光与光电子学进展, 2017, 54 (10): 101403, 网络出版: 2017-10-09  

用于Nd∶YAG板条增益介质的非稳腔技术

Unstable Resonator Technique for Nd∶YAG Slab Gain Medium
作者单位
中国电子科技集团公司第十一研究所激光技术研究部固体激光技术重点实验室, 北京 100015
摘要
非稳腔在大菲涅耳数条件下可实现光的高效提取效率, 也可保持高光束质量。设计了一款用于Nd∶YAG板条增益介质的传导冷却端面抽运结构的望远镜型离轴介稳-非稳混合谐振腔, 输出耦合镜为变反镜。该混合腔的宽度方向(板条增益介质的x方向)为非稳腔, 厚度方向(板条增益介质的y方向)为介稳腔。通过理论分析得出, 当抽运功率为10 kW时, 该介稳-非稳混合腔结构的输出功率为4428.7 W, 光-光转换效率为0.4429。
Abstract
An unstable resonator can obtain high extraction efficiency of light as well as high beam quality under the condition of the large Fresnel number. We design a telescopic off-axis metastable-unstable hybrid resonator with conduction-cooled end-pumped structure which can be used as the Nd∶YAG slab gain medium, and its output coupling mirror is a variable reflectivity mirror. The resonator in the width direction of the hybrid resonator (the x direction of the slab gain medium) is an unstable resonator, and the resonator in the thickness direction (the y direction of the slab gain medium) is a metastable resonator. Through the theoretical analysis, an output power of 4428.7 W of this metastable-unstable hybrid resonator structure and an optical-optical efficiency of 0.4429 can be obtained when the pump power is 10 kW.

雷健, 刘洋, 李天琦, 李宝, 王喆, 唐晓军. 用于Nd∶YAG板条增益介质的非稳腔技术[J]. 激光与光电子学进展, 2017, 54(10): 101403. Lei Jian, Liu Yang, Li Tianqi, Li Bao, Wang Zhe, Tang Xiaojun. Unstable Resonator Technique for Nd∶YAG Slab Gain Medium[J]. Laser & Optoelectronics Progress, 2017, 54(10): 101403.

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