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Tm:YLF激光器温度场分布计算与实验

Temperature distribution calculation and experiments of Tm:YLF laser

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摘要

设计并研究了双晶四端泵浦的Tm:YLF激光器。利用Ansys 软件中的稳态热分析模块计算了散热底板水通道在热交换系数分别为1 000 W/(m2·℃)、4 000 W/(m2·℃)、8 000 W/(m2·℃) 和 15 000 W/(m2·℃)以及采用TEC制冷时对应的晶体夹具及散热底板的温度分布。根据计算结果, 在采用水温16℃中等强制对流及以上时与TEC制冷控温18~20℃时对Tm:YLF晶体冷却效果近似, 可近似等效于TEC制冷。根据模拟计算的结果, 设计了可用光纤耦合半导体激光器泵浦的U型腔结构Tm: YLF激光器。在采用16℃冷却水直接冷却晶体夹具时, 单晶双端泵浦和双晶四端泵浦的Tm: YLF输出功率分别达到了25.9 W和46 W的激光输出, 对应的斜效率分别为40.7%和37.1%。在实验过程中, 晶体夹具未出现温度过高。实验结果说明设计的直接传导冷却系统可有效地冷却泵浦功率在140 W时的双晶四端泵浦结构Tm:YLF晶体。

Abstract

The structure of double-crystal four-end pumped Tm:YLF laser was designed and studied. By using steady-state thermal analysis module in the Ansys software, the temperature distributions of the two crystal-clamps and cooling plate were calculated with the heat exchange coefficients of the cooling plate channels given as 1 000 W/(m2·℃), 4 000 W/(m2·℃), 8 000 W/(m2·℃) and 15 000 W/(m2·℃). Meanwhile, the temperature distributions when the cooling-plate was assumed as a TEC cooler with temperatures of 18℃ and 20℃ were calculated, respectively. According to the calculated results, the cooling effect when the cooling-plate was given as medium convection intensity or higher would be equal to the result when taking the cooling-plate as TEC with temperature of 18℃ and 20℃. According to the simulation results, a U-shape Tm:YLF laser was designed pumped by fiber coupled laser diode. The output lasers with powers of 25.9 W and 46 W were achieved from single crystal and double crystals when the Tm:YLF crystal clamps and cooling plate were directly cooled by 16℃ cold water, corresponding to slope efficiencies of 40.7% and 37.1%, respectively. No over high temperature was observed in the whole experiment. The experiment results indicate that the designed direct conduction cooling system can effectively remove the heat load in single-crystal dual-end and double-crystal four-end pumped Tm:YLF laser.

Newport宣传-MKS新实验室计划
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中图分类号:TN248.1

DOI:10.3788/irla201746.0506001

所属栏目:激光技术及应用

基金项目:国家自然科学基金(61378021)

收稿日期:2016-09-10

修改稿日期:2016-10-20

网络出版日期:--

作者单位    点击查看

李 岩:北京理工大学 光电学院, 北京 100081
张艺轩:北京理工大学 光电学院, 北京 100081
纳全鑫:北京理工大学 光电学院, 北京 100081
高明伟:北京理工大学 光电学院, 北京 100081
高春清:北京理工大学 光电学院, 北京 100081

联系人作者:李岩(19820801@bit.edu.cn)

备注:李岩(1982-), 男, 博士生, 主要从事2 μm波段固体激光器方面的研究。

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引用该论文

Li Yan,Zhang Yixuan,Na Quanxin,Gao Mingwei,Gao Chunqing. Temperature distribution calculation and experiments of Tm:YLF laser[J]. Infrared and Laser Engineering, 2017, 46(5): 0506001

李 岩,张艺轩,纳全鑫,高明伟,高春清. Tm:YLF激光器温度场分布计算与实验[J]. 红外与激光工程, 2017, 46(5): 0506001

被引情况

【1】陈琦鹤,范杰,马晓辉,王海珠,石琳琳. 用于半导体激光器的高效率复合波导结构. 红外与激光工程, 2017, 46(11): 1106006--1

【2】苑利钢,周寿桓,赵 鸿,陈 国,魏 磊,李 宝,王克强. 109.5 W输出1.94 μm波长Tm:YAP固体激光器. 红外与激光工程, 2019, 48(4): 405006--1

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