波长可调谐的瓦级连续橙红光激光器  

Watt-level continuous wave orange-red laser with wavelength tunable

作　　者：白冰[1,2] 王建洲 孙延笑 陈玉华[1,2] 白杨[1,2] 白晋涛[1,2] Bai Bing Wang Jianzhou Sun Yanxiao Chen Yuhua Bai Yang Bai Jintao(Institute of Photonics and Photo-Technology, Northwest University, Xi＇an 710069, China Weinan Optoelectrionics Technology Co. , Ltd, Xi＇an Heavy Equipment Manufacturing Group, Weinan 714000, China Shaanxi Engineering Technology Research Center for All Solid State Laser and Application, Northwest University, Xi＇an 710069, China)

机构地区：[1]西北大学光子学与光子技术研究所,陕西西安710069 [2]陕西省全固态激光及应用工程技术研究中心,陕西西安710069 [3]西安重装渭南光电科技有限公司,陕西渭南714000

出　　处：《应用光学》2017年第2期309-315,共7页Journal of Applied Optics

基　　金：国家自然科学基金青年项目(61205114);陕西省科技统筹计划项目(2011KTCL01-06)

摘　　要：介绍了基于复合腔结构的全固态波长可调谐的连续橙红色激光的输出特性。该复合腔由一个使用周期极化晶体MgO∶PPLN的信号光单谐振光参量振荡器和一个LD侧面泵浦Nd∶GdVO_4晶体的1 062.9nm基频光谐振腔构成。s-偏振1 062.9nm泵浦光抽运单谐振光参量振荡器产生s-偏振信号光腔内独立振荡。通过复合腔结构的优化设计,使独立振荡的p-偏振1 062.9nm基频光与s-偏振信号光在2个子腔的重叠区内通过II类角度匹配KTP晶体的腔内和频过程获得橙红色激光。当MgO∶PPLN晶体的调谐温度从30℃上升至200℃时,s-偏振信号光的中心波长产生红移,导致其与p-偏振1 062.9nm基频光和频产生的橙红色激光的中心波长从620.2nm红移至628.9nm。同时测得中红外波段闲频光的中心波长从3 714.2nm蓝移至3 438.3nm。在30℃最低设定温度时,中心波长620.2nm的橙红色激光和中心波长3 714.2nm的闲频光最大连续输出功率分别达到2.0 W和2.9 W。Output characteristics of continuous wave（CW）orange-red laser with all-solid wavelength tunable based on composite cavity structure are introduced. Composite cavity is composed of an s-polarized signal singly resonant optical parametric oscillator （SRO） using an MgO-doped periodically-poled LiNbO3 （MgO： PPLN） crystal and a p-polarized 1 062.9 nm fundamental frequency light cavity. Independent oscillations of signal light pumped by an s-polarized 1 062.9 nm laser and p-polarized 1062.9 nm fundamental frequency are generated in respective cavity, which produces orange-red laser using a type-II critical phase-matched KTP crystal in intracavity sum-frequency generation process. When tuning temperature of MgO∶PPLN crystal rises from 30℃ to 200℃, CW orange-red laser beams are obtained with tunable wavelengths from 620.2 nm to 628.9 nm based on wavelength red-shift of s-polarized signal light, corresponding to a measured waveband of mid-infrared idler light from 3 714.2 nm to 3 438.3 nm. At minimum temperature of 30℃, maximum CW output power of orange-red laser is obtained to be 2.0 W at 620.2 nm, corresponding to CW output power of idler light is 2.9 W at 3 714.2 nm.

关 键 词：橙红色激光 波长可调谐 温度调谐 复合谐振腔 和频 

分 类 号：TN248[电子电信—物理电子学] O437.4[机械工程—光学工程]