Modeling for Spatial Overlap Effect of End-Pumped Passively Q-Switched Nd:YVO4/Cr4+:YAG Laser and Its Experimental Verification

Yueh Chi Tu; Min Xiang Hsieh; Hsing Chih Liang; Yan Ting Yu

doi:10.3390/app12031338

Modeling for Spatial Overlap Effect of End-Pumped Passively Q-Switched Nd:YVO₄/Cr⁴⁺:YAG Laser and Its Experimental Verification

Yueh Chi Tu, Min Xiang Hsieh, Hsing Chih Liang, Yan Ting Yu^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

In this work, the spatial effects of the pumping and lasing were considered into the coupled rate equations of passively Q-switched lasers for the condition of no saturation in the gain medium. A transcendental equation of energy utilization was derived, and the solution to the equation was approximated by an analytic model developed in previous work. The reflection factor of output coupler with low reflectivity was modified for more accurate output energy evaluations. Experimentally, an end-pumped Nd:YVO₄/Cr⁴⁺:YAG laser in a concave-plano cavity with output coupling reflectivity ranging from 10% to 92% was demonstrated, and two different pumping spot sizes of laser diode were adopted for validating the developed spatial model. The experimental results showed good agreements with the theoretical calculations.

Original language	English
Article number	1338
Journal	Applied Sciences (Switzerland)
Volume	12
Issue number	3
DOIs	https://doi.org/10.3390/app12031338
State	Published - 1 Feb 2022

Keywords

Passively Q-switched
Solid-state lasers
Spatial overlap effect

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10.3390/app12031338

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title = "Modeling for Spatial Overlap Effect of End-Pumped Passively Q-Switched Nd:YVO4/Cr4+:YAG Laser and Its Experimental Verification",

abstract = "In this work, the spatial effects of the pumping and lasing were considered into the coupled rate equations of passively Q-switched lasers for the condition of no saturation in the gain medium. A transcendental equation of energy utilization was derived, and the solution to the equation was approximated by an analytic model developed in previous work. The reflection factor of output coupler with low reflectivity was modified for more accurate output energy evaluations. Experimentally, an end-pumped Nd:YVO4/Cr4+:YAG laser in a concave-plano cavity with output coupling reflectivity ranging from 10% to 92% was demonstrated, and two different pumping spot sizes of laser diode were adopted for validating the developed spatial model. The experimental results showed good agreements with the theoretical calculations.",

keywords = "Passively Q-switched, Solid-state lasers, Spatial overlap effect",

author = "Tu, {Yueh Chi} and Hsieh, {Min Xiang} and Liang, {Hsing Chih} and Yu, {Yan Ting}",

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T1 - Modeling for Spatial Overlap Effect of End-Pumped Passively Q-Switched Nd:YVO4/Cr4+:YAG Laser and Its Experimental Verification

AU - Tu, Yueh Chi

AU - Hsieh, Min Xiang

AU - Liang, Hsing Chih

AU - Yu, Yan Ting

PY - 2022/2/1

Y1 - 2022/2/1

N2 - In this work, the spatial effects of the pumping and lasing were considered into the coupled rate equations of passively Q-switched lasers for the condition of no saturation in the gain medium. A transcendental equation of energy utilization was derived, and the solution to the equation was approximated by an analytic model developed in previous work. The reflection factor of output coupler with low reflectivity was modified for more accurate output energy evaluations. Experimentally, an end-pumped Nd:YVO4/Cr4+:YAG laser in a concave-plano cavity with output coupling reflectivity ranging from 10% to 92% was demonstrated, and two different pumping spot sizes of laser diode were adopted for validating the developed spatial model. The experimental results showed good agreements with the theoretical calculations.

AB - In this work, the spatial effects of the pumping and lasing were considered into the coupled rate equations of passively Q-switched lasers for the condition of no saturation in the gain medium. A transcendental equation of energy utilization was derived, and the solution to the equation was approximated by an analytic model developed in previous work. The reflection factor of output coupler with low reflectivity was modified for more accurate output energy evaluations. Experimentally, an end-pumped Nd:YVO4/Cr4+:YAG laser in a concave-plano cavity with output coupling reflectivity ranging from 10% to 92% was demonstrated, and two different pumping spot sizes of laser diode were adopted for validating the developed spatial model. The experimental results showed good agreements with the theoretical calculations.

KW - Passively Q-switched

KW - Solid-state lasers

KW - Spatial overlap effect

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Modeling for Spatial Overlap Effect of End-Pumped Passively Q-Switched Nd:YVO₄/Cr⁴⁺:YAG Laser and Its Experimental Verification

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