Thermodynamic damage behavior of single-crystal MgF2 irradiated by high-power fiber laser

doi:10.1117/1.OE.62.9.096102

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	Thermodynamic damage behavior of single-crystal MgF2 irradiated by high-power fiber laser
	J. Wang, K. Zhang, J. Yu, Y. Chen, C. Zheng, P. Yang, G. Bao and F. Chen
	2023
发表期刊	Optical Engineering
ISSN	00913286
卷号	62 期号:9
摘要	Magnesium fluoride (MgF2) is a widely used optical window material in lasers. Laser-induced damage in MgF2 materials involves complex thermal-mechanical coupling issues. With the rapid development of high-power fiber laser technologies and application of optoelectronic countermeasures, it is necessary to investigate the damage mechanism of 1.06 μm high-power continuous-wave laser on MgF2 optical windows to clarify the laser damage threshold and factors influencing laser-irradiated MgF2 window mirrors. Therefore, based on the theory of heat conduction and elastic mechanics, a simulation study was conducted using the finite element method. First, based on the thermo-mechanical theory, established a thermo-mechanical damage model for a laser-irradiated MgF2 crystal. Second, we calculated the temperature, stress, and strain fields of single-crystal MgF2 material under the action of a 100 W / cm2 laser. When the laser was irradiated for 4.921 s, thermal stress-induced burst damage was observed, but no melting damage occurred. Finally, the impact of parameters such as the laser power density, spot size, and laser action time on the damage effect was discussed using the parametric scanning method. The calculation results showed that the aforementioned factors significantly impact the damaging effect. Moreover, under the same laser parameters, material burst due to thermal stress is expected to precede the melt damage. © 2023 Society of Photo-Optical Instrumentation Engineers (SPIE).
DOI	10.1117/1.OE.62.9.096102
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收录类别	ei
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/67943
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	J. Wang, K. Zhang, J. Yu, Y. Chen, C. Zheng, P. Yang, G. Bao and F. Chen. Thermodynamic damage behavior of single-crystal MgF2 irradiated by high-power fiber laser[J]. Optical Engineering,2023,62(9).
APA	J. Wang, K. Zhang, J. Yu, Y. Chen, C. Zheng, P. Yang, G. Bao and F. Chen.(2023).Thermodynamic damage behavior of single-crystal MgF2 irradiated by high-power fiber laser.Optical Engineering,62(9).
MLA	J. Wang, K. Zhang, J. Yu, Y. Chen, C. Zheng, P. Yang, G. Bao and F. Chen."Thermodynamic damage behavior of single-crystal MgF2 irradiated by high-power fiber laser".Optical Engineering 62.9(2023).

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