Design Criteria for Concentration Optimization in Scaling Diode End-Pumped Lasers to High Powers: Influence of Thermal Fracture

Yung-Fu Chen

doi:10.1109/3.740746

Design Criteria for Concentration Optimization in Scaling Diode End-Pumped Lasers to High Powers: Influence of Thermal Fracture

Yung-Fu Chen^*

^*Corresponding author for this work

Department of Electrophysics

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

183 Scopus citations

Abstract

A systematic investigation of a series of Nd:YVO₄ crystals with different dopant concentrations is conducted to scale the performance of diode-end-pumped lasers to higher powers. From the theoretical analysis, the fracture-limited pump power is expressed as a function of the thermal shock parameter, fractional thermal loading, and the absorption coefficient. The thermal shock parameter of Nd:YVO₄ crystals is determined from the laser experiments. Using the thermal shock parameter and the space-rate-equation model, we calculate the maximum output power in Nd:YVO₄ crystals at the optimum pump condition as a function of the dopant concentration. The theoretical calculations are in good agreement with the experimental results. The influence of lowering the absorption coefficient on the TEM₀₀ output efficiency is also studied through the overlapping integral.

Original language	English
Pages (from-to)	234-239
Number of pages	6
Journal	IEEE Journal of Quantum Electronics
Volume	35
Issue number	2
DOIs	https://doi.org/10.1109/3.740746
State	Published - 1 Feb 1999

Keywords

Absorption coefficient
Diode-end-pumped lasers
Dopant concentration
Thermal fracture

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AB - A systematic investigation of a series of Nd:YVO4 crystals with different dopant concentrations is conducted to scale the performance of diode-end-pumped lasers to higher powers. From the theoretical analysis, the fracture-limited pump power is expressed as a function of the thermal shock parameter, fractional thermal loading, and the absorption coefficient. The thermal shock parameter of Nd:YVO4 crystals is determined from the laser experiments. Using the thermal shock parameter and the space-rate-equation model, we calculate the maximum output power in Nd:YVO4 crystals at the optimum pump condition as a function of the dopant concentration. The theoretical calculations are in good agreement with the experimental results. The influence of lowering the absorption coefficient on the TEM00 output efficiency is also studied through the overlapping integral.

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Design Criteria for Concentration Optimization in Scaling Diode End-Pumped Lasers to High Powers: Influence of Thermal Fracture

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Keywords

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