Comprehensive Thermal Analysis of Diamond in a High-Power Raman Cavity Based on FVM-FEM Coupled Method

Despite their extremely high thermal conductivity and low thermal expansion coefficients, thermal effects in diamond are still observed in high-power diamond Raman lasers, which proposes a challenge to their power scaling. Here, the dynamics of temperature gradient and stress distribution in the dia...

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Autores principales: Bai, Zhenxu, Zhang, Zhanpeng, Wang, Kun, Gao, Jia, Zhang, Zhendong, Yang, Xuezong, Wang, Yulei, Lu, Zhiwei, Mildren, Richard P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8232721/
https://www.ncbi.nlm.nih.gov/pubmed/34203840
http://dx.doi.org/10.3390/nano11061572
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author Bai, Zhenxu
Zhang, Zhanpeng
Wang, Kun
Gao, Jia
Zhang, Zhendong
Yang, Xuezong
Wang, Yulei
Lu, Zhiwei
Mildren, Richard P.
author_facet Bai, Zhenxu
Zhang, Zhanpeng
Wang, Kun
Gao, Jia
Zhang, Zhendong
Yang, Xuezong
Wang, Yulei
Lu, Zhiwei
Mildren, Richard P.
author_sort Bai, Zhenxu
collection PubMed
description Despite their extremely high thermal conductivity and low thermal expansion coefficients, thermal effects in diamond are still observed in high-power diamond Raman lasers, which proposes a challenge to their power scaling. Here, the dynamics of temperature gradient and stress distribution in the diamond are numerically simulated under different pump conditions. With a pump radius of 100 μm and an absorption power of up to 200 W (corresponding to the output power in kilowatt level), the establishment period of thermal steady-state in a millimeter diamond is only 50 μs, with the overall thermal-induced deformation of the diamond being less than 2.5 μm. The relationship between the deformation of diamond and the stability of the Raman cavity is also studied. These results provide a method to better optimize the diamond Raman laser performance at output powers up to kilowatt-level.
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spelling pubmed-82327212021-06-26 Comprehensive Thermal Analysis of Diamond in a High-Power Raman Cavity Based on FVM-FEM Coupled Method Bai, Zhenxu Zhang, Zhanpeng Wang, Kun Gao, Jia Zhang, Zhendong Yang, Xuezong Wang, Yulei Lu, Zhiwei Mildren, Richard P. Nanomaterials (Basel) Article Despite their extremely high thermal conductivity and low thermal expansion coefficients, thermal effects in diamond are still observed in high-power diamond Raman lasers, which proposes a challenge to their power scaling. Here, the dynamics of temperature gradient and stress distribution in the diamond are numerically simulated under different pump conditions. With a pump radius of 100 μm and an absorption power of up to 200 W (corresponding to the output power in kilowatt level), the establishment period of thermal steady-state in a millimeter diamond is only 50 μs, with the overall thermal-induced deformation of the diamond being less than 2.5 μm. The relationship between the deformation of diamond and the stability of the Raman cavity is also studied. These results provide a method to better optimize the diamond Raman laser performance at output powers up to kilowatt-level. MDPI 2021-06-15 /pmc/articles/PMC8232721/ /pubmed/34203840 http://dx.doi.org/10.3390/nano11061572 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Bai, Zhenxu
Zhang, Zhanpeng
Wang, Kun
Gao, Jia
Zhang, Zhendong
Yang, Xuezong
Wang, Yulei
Lu, Zhiwei
Mildren, Richard P.
Comprehensive Thermal Analysis of Diamond in a High-Power Raman Cavity Based on FVM-FEM Coupled Method
title Comprehensive Thermal Analysis of Diamond in a High-Power Raman Cavity Based on FVM-FEM Coupled Method
title_full Comprehensive Thermal Analysis of Diamond in a High-Power Raman Cavity Based on FVM-FEM Coupled Method
title_fullStr Comprehensive Thermal Analysis of Diamond in a High-Power Raman Cavity Based on FVM-FEM Coupled Method
title_full_unstemmed Comprehensive Thermal Analysis of Diamond in a High-Power Raman Cavity Based on FVM-FEM Coupled Method
title_short Comprehensive Thermal Analysis of Diamond in a High-Power Raman Cavity Based on FVM-FEM Coupled Method
title_sort comprehensive thermal analysis of diamond in a high-power raman cavity based on fvm-fem coupled method
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8232721/
https://www.ncbi.nlm.nih.gov/pubmed/34203840
http://dx.doi.org/10.3390/nano11061572
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