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
激光器 半导体激光器 激光谐振腔 传导冷却端面抽运结构 变反镜 lasers semiconductor lasers laser resonator conduction-cooled end-pumped structure variable reflectivity mirror
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.