侧面抽运Nd…YAG锁模径向偏振光  

Side-Pumped Nd…YAG Mode-Locked Radially Polarized Laser

作　　者：李政委 陈檬[1] 李港[1] 

机构地区：[1]北京工业大学激光工程研究院,北京100124

出　　处：《中国激光》2014年第1期26-29,共4页Chinese Journal of Lasers

摘　　要：根据Nd…YAG晶体侧面抽运下径向和切向热焦距的不同,以及半导体可饱和吸收镜(SESAM)被动锁模条件,利用激光二极管(LD)侧面抽运Nd…YAG四镜折叠SESAM被动锁模腔,在腔内无偏振选择器件条件下,实现锁模径向偏振光输出。模拟计算了径向偏振态和角向偏振态光斑大小与抽运电流之间的关系,分析给出了实现SESAM稳定锁模的条件,通过放置适当孔径的光阑,获得了最大输出功率为13 W、偏振态纯度大于92%、重复频率为59MHz的1064nm锁模径向偏振光。A mode-locked radially polarized laser is generated based on the difference of thermal focal length in side- pumped Nd： YAG and the condition of mode-locking by the semiconductor saturable absorption mirror （SESAM）. The spot size of radial polarization and azimuthal polarization with different pumping currents, and the parameters of the LD side-pumped Nd, YAG four-mirror-folded passively mode-locked cavity are analyzed. The maximum output power of 13 W with the frequency of 59 MHz and the wavelength of 1064 nm is acquired. We demonstrate that the purity of the radially polarized beam is more than 92 %.

关 键 词：激光器 全固态激光 径向偏振 YAG锁模 热焦距 

分 类 号：TN[电子电信]