Comprehensive thermal analysis of diamond in a high-power Raman cavity based on FVM-FEM coupled method

Zhenxu Bai, Zhanpeng Zhang, Kun Wang*, Jia Gao, Zhendong Zhang, Xuezong Yang, Yulei Wang, Zhiwei Lu, Richard P. Mildren

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number1572
Pages (from-to)1-12
Number of pages12
JournalNanomaterials
Volume11
Issue number6
DOIs
Publication statusPublished - Jun 2021

Bibliographical note

Copyright © 2021 by the authors. Licensee MDPI, Basel, Switzerland. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • Diamond
  • FVM-FEM
  • High-power
  • Raman laser
  • Thermal analysis

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