高功率金刚石拉曼激光器热效应数值模拟

张飞; 郑浩; 李鹏飞; 陈晖; 丁洁; 齐瑶瑶; 颜秉政; 王雨雷; 吕志伟; 白振旭

doi:10.5768/JAO202344.0610006

高功率金刚石拉曼激光器热效应数值模拟

doi: 10.5768/JAO202344.0610006

张飞^{1, 2,},
郑浩^{1, 2},
李鹏飞^{1, 2},
陈晖^{1, 2},
丁洁^{1, 2},
齐瑶瑶^{1, 2},
颜秉政^{1, 2},
王雨雷^{1, 2},
吕志伟^{1, 2},
白振旭^{1, 2, ,}

1.
河北工业大学先进激光技术研究中心，天津 300401
2.
河北省先进激光技术与装备重点实验室，天津 300401

基金项目: 国家自然科学基金（61927815）；天津市自然科学基金（22JCYBJC01100）；河北省自然科学基金（F2023202063）；量子光学与光量子器件国家重点实验室开放课题（KF202201）；河北工业大学基本科研业务费（JBKYTD2201）

详细信息

作者简介:
张飞（1994—），男，博士研究生，主要从事高功率金刚石拉曼激光器研究。E-mail：1607794625@qq.com

通讯作者:
白振旭（1987—），男，博士，教授，主要从事高功率激光技术与新型激光器研究。E-mail：baizhenxu@hotmail.com

中图分类号: TN248
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- 文章访问数: 62
- HTML全文浏览量: 26
- PDF下载量: 14
- 被引次数: 0
出版历程
- 收稿日期: 2023-07-14
- 修回日期: 2023-10-12
- 网络出版日期: 2023-10-21
- 刊出日期: 2023-11-22

Numerical simulation of thermal effects in high-power diamond Raman lasers

ZHANG Fei^{1, 2
,},
ZHENG Hao^{1, 2},
LI Pengfei^{1, 2},
CHEN Hui^{1, 2},
DING Jie^{1, 2},
QI Yaoyao^{1, 2},
YAN Bingzheng^{1, 2},
WANG Yulei^{1, 2},
LYU Zhiwei^{1, 2},
BAI Zhenxu^{1, 2
, ,}

1.
Center for Advanced Laser Technology, Hebei University of Technology, Tianjin 300401, China
2.
Hebei Key Laboratory of Advanced Laser Technology and Equipment, Tianjin 300401, China

摘要

摘要: 金刚石晶体不仅具有极佳的光学性质，同时也拥有极高的热导率和低的热膨胀系数，这使得金刚石激光器成为实现不受热影响高功率激光输出的重要路径。但随着激光功率的进一步提升，金刚石拉曼激光器中仍然存在不可忽视的热效应等问题，这对金刚石激光器性能提升提出了挑战。针对高功率运转情况下金刚石拉曼激光器的热效应进行了理论研究，根据热传导方程并采用有限元分析方法，模拟了金刚石温度、热应力以及热形变分布，分析了泵浦参数、晶体参数对金刚石温度、热应力、热形变的影响。此外，基于石墨片横向导热特性，设计了一种新型的用于金刚石晶体的热沉结构。与传统单一铜片散热方式相比，在泵浦功率800 W、束腰半径40 μm条件下，金刚石中心温度下降了10.16 K，下表面平均应力降低了19.857 MPa，端面平均形变量减小了0.055 μm。数值模拟结果表明，该方法对缓解金刚石激光的热效应，实现金刚石拉曼激光器输出功率的进一步提升和高光束质量激光输出具有重要指导意义。
- 金刚石 /
- 拉曼激光器 /
- 高功率 /
- 热效应 /
- 数值仿真 /
- 热沉
Abstract: Diamond crystals not only have excellent optical properties, but also have extremely high thermal conductivity and low thermal expansion coefficient, which makes diamond laser an important path to achieve high-power laser output without heat. However, with the further increase of laser power, thermal effects that cannot be ignored in diamond Raman lasers (DRLs), which poses a challenge to the performance improvement of diamond lasers. The thermal effect of the DRLs under high power operation was studied theoretically. Based on the thermal conduction equation and finite element analysis method, the temperature, thermal stress and thermal deformation distribution of diamond were simulated, and the effects of pump and crystal parameters on the above factors were analyzed. Moreover, a novel heat sink structure for diamond was designed based on the transverse thermal conductivity characteristics of graphite sheets. Compared with traditional heat dissipation methods of single copper-sheet, under the pump power of 800 W and waist radius of 40 μm, the center temperature of the diamond was reduced by 10.16 K, the average stress on the lower surface was reduced by 19.857 MPa, and the average deformation of the end face was reduced by 0.055 μm. The numerical simulation results show that this method has important guiding significance for mitigating the thermal effect of diamond laser, further enhancing the output power of DRLs and achieving high beam quality laser output.
- diamond /
- Raman laser /
- high power /
- thermal effect /
- numerical simulation /
- heat sink

HTML全文

图 1 金刚石拉曼激光器模型

Fig. 1 Diamond Raman laser model

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图 2 金刚石温度分布

Fig. 2 Diamond temperature distribution

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图 3 泵浦参数对温度的影响

Fig. 3 Effect of pump parameters on temperature

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图 4 金刚石尺寸对温度的影响

Fig. 4 Effect of diamond size on temperature

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图 5 金刚石应力分布

Fig. 5 Diamond stress distribution

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图 6 泵浦参数对应力的影响

Fig. 6 Effect of pump parameters on stress

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图 7 金刚石尺寸对应力的影响

Fig. 7 Effect of diamond size on stress

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图 8 金刚石形变分布

Fig. 8 Deformation distribution of diamond

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图 9 泵浦参数对形变的影响

Fig. 9 Effect of pump parameters on deformation

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图 10 金刚石尺寸对形变的影响

Fig. 10 Effect of diamond size on deformation

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图 11 热沉结构对金刚石温度、应力以及形变的影响

Fig. 11 Effect of heat sink structure on temperature, stress and deformation of diamond

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表 1 金刚石热模拟中的相关参数^[40]

Table 1 Parameters used in diamond thermal simulation^[40]

	参数	值
金刚石	热导率/(W·m⁻¹·K⁻¹)	2200
	热膨胀系数/K	1.1×10⁻⁶
	密度/(g·cm⁻³)	3.515
	比热容/(J·g⁻¹·K⁻¹)	520
	杨氏模量/GPa	1050
	泊松比	0.069
	尺寸/mm	7×1×1
	折射率	2.38
铜	热导率/(W·m⁻¹·K⁻¹)	385
铜	尺寸/mm	9×4×1
石墨片	热导率/(W·m⁻¹·K⁻¹)	2 000、35
石墨片	尺寸/mm	7×1×0.5
金刚石拉曼激光器	泵浦功率/W	800
	输出功率/W	320
	剩余泵浦功率/W	80
	光束质量因子	1.3
	泵浦波长/nm	1064
	泵浦束腰半径/µm	40
	温度/K	295.15
环境	空气对流换热系数/(W·m⁻²·K⁻¹)	10

下载: 导出CSV

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