无热退偏损耗Nd∶YAG环形腔单纵模激光器  

Nd∶YAG single-frequency ring laser without thermal-depolarization loss

作　　者：杨晓冬 朱伟玲 侯新华 YANG Xiao-dong;ZHU Wei-ling;HOU Xin-hua(School of Science,Guangdong University of Petrochemical Technology,Maoming 525000,China)

机构地区：[1]广东石油化工学院理学院,广东茂名525000

出　　处：《激光与红外》2020年第10期1196-1199,共4页Laser & Infrared

摘　　要：在Nd∶YAG侧面泵浦四镜环形腔单纵模激光器内,采用薄膜偏振片反射光束作为输出光束,以消除环形腔内热退偏损耗,提高输出功率及效率。实验表明,该Nd∶YAG环形腔可单向运转并输出单纵模激光,环形腔激光器内无热退偏损耗。在驱动电流为21 A时,环形腔激光器输出5.1 W 1064 nm单纵模激光,输出激光线宽为200 MHz,输出光束为线偏振光。通过采用端面泵浦结构,以及采用对p偏振光反射率与泵浦功率相匹配的薄膜偏振片,激光器单纵模输出功率及效率可望进一步提高。To eliminate depolarization loss in the side-pumped Nd∶YAG ring resonator single-longitudinal-mode laser,the laser beam reflected by the thin-film-polarizer was used as output of the ring resonator.The experiments show that the ring resonator unidirectional operate and deliver single longitudinal-mode laser beam.There is not depolarization loss in this ring resonator.Under a drive currents of 21A,5.1W 1064 nm single-longitudinal-mode laser beam with a line-width of about 200 MHz was obtained from this ring resonator.The polarization state from the ring resonator is line-polarized light.The output power and the efficiency of the ring resonator can be further increased by use of the end-pumped geometry and the thin-film polarizer with optimum-reflectivity for p-polarized light in the ring resonator.

关 键 词：退偏损耗 Nd∶YAG 环形腔 单纵模 

分 类 号：O436[机械工程—光学工程] TN248[理学—光学]