掺Nd^(3+)玻璃微球阵列激光器的热学性能研究  

Thermal analysis of the neodymium-doped microspheres array lasers

作　　者：丁建永 桂珞[2] 彭波[3] 韦玮[1] 

机构地区：[1]南京邮电大学光电工程学院,南京210046 [2]中国科学院上海光学精密机械研究所高功率激光和物理联合实验室,上海201800 [3]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,西安710119

出　　处：《激光技术》2014年第1期17-20,共4页Laser Technology

基　　金：国家自然科学基金资助项目(61077070;61177086)

摘　　要：为了研究二极管阵列抽运折射率匹配液冷却的掺Nd3+玻璃微球阵列增益区产生的热效应,采用FLUENT 6.3.26软件建立了激光器增益区流场的热-流-固耦合模型,利用有限元分析法,模拟分析了钕玻璃微球阵列的温度分布与自身尺寸、匹配液流速、微球层数和抽运频率的变化关系及其对热畸变的影响。由模拟结果可知,固体微球激光器的热恢复时间短,冷却效果与微球层数无关,流速增加对小尺寸微球的冷却效果无明显改善;当抽运频率为1Hz时,直径为2mm和4mm的微球增益区的单程最大光程差为3.1nm和51.9nm。结果表明,该构型激光器具有高效的冷却能力。这一结果对微球阵列激光器的热管理是有帮助的。In order to study the thermal effect of the neodymium-doped mierosphere array caused by the pumping laser diode array （LDA）, a thermal-flow-solid coupling model was established with FLUENT6. 3.26 software, and the dependence of the temperature of neodymium-doped microsphere array on its size, fluid velocity, pump frequency and the number of microsphere layers was analyzed by means of finite element analysis. Analysis resuhs show that the laser has short thermal recovery time and the cooling effect has nothing to do with the number of layers. The cooling effect of the microspheres in the small size isnI improved by increasing velocity. The maximum one-way optical path difference of Nd3 ＋ microsphere in 2mm and 4mm diameter was 3. lnm and 51.9nm respectively at a repetition rate of 1Hz. The results show that the neodymium-doped microsphere array laser has a highly efficient cooling capacity and is beneficial to the thermal management of a microsphere array laser.

关 键 词：激光器 热分析 流-热-固耦合模型 折射率匹配 二极管抽运 

分 类 号：TN248.1[电子电信—物理电子学]