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The temperature profile within Er3+: Yb3+: LuAl3(BO3)4 crystal: Insights uncovered by a combined theoretical and experimental study.

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Title: The temperature profile within Er3+: Yb3+: LuAl3(BO3)4 crystal: Insights uncovered by a combined theoretical and experimental study.
Authors: Fu, Weiling1,2,3 (AUTHOR), Qi, Dawei1,3,4 (AUTHOR), Zhong, Tingting1 (AUTHOR), Chen, Yujin5 (AUTHOR), Huang, Yidong5 (AUTHOR), Deng, Shuiquan1,6 (AUTHOR) sdeng@fjirsm.ac.cn
Source: Optics & Laser Technology. Sep2024, Vol. 176, pN.PAG-N.PAG. 1p.
Subjects: Energy dissipation, Crystals, Heat transfer, Temperature, Temperature distribution
Abstract: • A three-beam of lights model is proposed, which provides a rather good explanation of the measured temperature profiles. • A new formula for analyzing the fractional thermal load is derived, with which more reasonable thermal load parameters are obtained. • A heat deposition mechanism elucidating the steady state of local heat generations and heat transfers is proposed. This work reports a measured temperature profile along the pump light beam inside the Er3+:Yb3+: LuAl 3 (BO 3) 4 crystal and the simulated ones. The temperature profile featured by a high and asymmetrical peak structure shows rather localized nature with respect to its transversal distribution. By scrutinous examination of the discrepancies between the experimental and simulated ones, a) a heat deposition mechanism elucidating the steady state of local heat generations and various heat transfers was suggested; b) a three-beam of lights model together with a formula for analyzing the fractional thermal load was developed, which leads to a good agreement between the simulated and experimental temperature profiles. The new formula provides a more transparent tool in physics to evaluate the various energy losses; The model can easily be adapted to solve the thermal problem in a laser medium, in particular when a medium show unignorable absorption effect for the laser signal. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:• A three-beam of lights model is proposed, which provides a rather good explanation of the measured temperature profiles. • A new formula for analyzing the fractional thermal load is derived, with which more reasonable thermal load parameters are obtained. • A heat deposition mechanism elucidating the steady state of local heat generations and heat transfers is proposed. This work reports a measured temperature profile along the pump light beam inside the Er3+:Yb3+: LuAl 3 (BO 3) 4 crystal and the simulated ones. The temperature profile featured by a high and asymmetrical peak structure shows rather localized nature with respect to its transversal distribution. By scrutinous examination of the discrepancies between the experimental and simulated ones, a) a heat deposition mechanism elucidating the steady state of local heat generations and various heat transfers was suggested; b) a three-beam of lights model together with a formula for analyzing the fractional thermal load was developed, which leads to a good agreement between the simulated and experimental temperature profiles. The new formula provides a more transparent tool in physics to evaluate the various energy losses; The model can easily be adapted to solve the thermal problem in a laser medium, in particular when a medium show unignorable absorption effect for the laser signal. [ABSTRACT FROM AUTHOR]
ISSN:00303992
DOI:10.1016/j.optlastec.2024.110896