激光二极管抽运10.5Wc轴切割Tm,Ho:YAP连续激光器的研究  

A Continuous-Wave c-Cut Tm,Ho:YAP Laser with 10.5 W Output Pumped by a Laser Diode

作　　者：李林军[1,2] 杨曦凝[3] 白云峰[2] 张治国[1] 

机构地区：[1]哈尔滨工业大学理学院物理系,黑龙江哈尔滨150001 [2]黑龙江工程学院光电子技术研究所,黑龙江哈尔滨150050 [3]哈尔滨玻璃钢研究院,黑龙江哈尔滨150001

出　　处：《激光与光电子学进展》2014年第5期128-132,共5页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61378029);中国博士后基金(20100481005;201104422)

摘　　要：设计并研究了高功率和高效率2044nmc轴切割Tm，Ho：YAP连续激光器。利用中心波长为794．75nm激光二极管双端面抽运C轴切割Tm，Ho：YAP晶体，晶体尺寸为4mm×4mm×7mm，其中Tm^3＋和Ho^3＋掺杂原子数分数分别为5％和0．3％，晶体采用液氮制冷。激光晶体的两个端面均镀有792～796nm和1900～2100nm的高透膜。C轴切割Tm．Ho：YAP激光器的谐振腔由一个平凹镜和一个平镜构成平凹腔，谐振腔的物理腔长为150mm。通过改变激光二极管的温度变换抽运波长，实验获得了10．5w的连续输出功率和37．4％的光光转换效率。A high power and efficiency continuous-wave 2044 nm c-cut Tm,Ho：YAP laser is designed and fabricated. Based on a dual-end pumped scheme, a c-cut Tm,Ho：YAP crystal is pumped by a laser diode with centre wavelength of 794.75 nm, the dimensions of crystal is 4 minx4 mmx7 mm, its co-doped atomic fraction are 5% Tm and 0.3% Ho, and the laser crystal is cooled by liquid N2. The end faces of laser crystal polished plane are both coated by 790-800 nm and 1900-2100 nm with reflectivity less than 0.5%. The resonator cavity of c-cut Tm,Ho：YAP is a piano-concave cavity with a piano-concave mirror and a fiat mirror, and its physical cavity length is 150 mm. The different pumped wavelengths are changed by altering the temperature of laser diode in experiment, a measured maximum output power of 10.5 W is achieved with an optical-optical conversion efficiency of 37.4%.

关 键 词：激光器 连续波 输出功率 抽运波长 转换效率 晶体 

分 类 号：TN248.1[电子电信—物理电子学]