LD端面抽运Nd:YLF/KTA连续光参量振荡激光  

LD end-pumped Nd:YLF/KTA continuous-wave optical parameter oscillator

作　　者：凤正荣[1] 段延敏[1] 李志平[2] 王鸿雁 郑崇伟[1] 张耀举[1] 张戈[2] 朱海永[1] 

机构地区：[1]温州大学物理与电子信息工程学院,浙江温州325035 [2]中国科学院福建物质结构研究所,福州350002 [3]青岛海泰光电技术有限公司,山东青岛266100

出　　处：《强激光与粒子束》2013年第6期1341-1344,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(10904143);浙江省自然科学基金项目(LY12F05003;Y6090220);浙江省新苗人才计划项目(2012R424060);温州市科技计划项目(G20110002)

摘　　要：采用非临界相位匹配切割,尺寸5mm×5mm×20mm的KTA作为非线性光学晶体,进行了基于半导体激光端面抽运Nd:YLF/KTA的内腔式连续光学参量振荡激光研究,获得了中红外3.5μm波段的连续激光输出。为了提高连续光参量振荡腔内信号光的功率密度,降低激光输出阈值,采用对信号光高反射的单谐振腔结构进行激光实验。在8.35W的抽运功率下,分别获得了335mW和110mW的3440nm和1505nm的激光输出,对应的总转换效率达到了5.6%。该实验研究表明半导体激光端面抽运的内腔式KTA连续光学参量振荡也能获得高效的中红外激光输出。This paper reports a continuous-wave 3.5 μm mid-infrared laser based on LD end-pumped Nd：YLF/KTA intra-cavity optical parametric oscillator （OPO）. A non-critical phase matching cut KTA crystal with 5 mm×5 mm×20 mm in size was adopted as the nonlinear optics crystal. A singly resonant oscillator with high reflectivity at signal light was designed to improve the power intensity of the signal light in the OPO cavity and reduce the threshold. The maximum output powers of 335 mW at 3440 nm and 110 mW at 1505 nm were obtained at the pump power of 8.35 W. The total conversion efficiency of 5.6% was achieved with respect to the same incident diode pump power. The results show that continuous-wave KTA-OPO derived by LD pumped solid laser also can produce efficient mid-infrared light.

关 键 词：中红外激光 光参量振荡器 KTA晶体 连续激光输出 

分 类 号：O437.4[机械工程—光学工程]