Thermal effect of high power Yb：YAG microchip solid-state laser

LI Long; DONG Wu-wei; SHI Peng; GAN An-sheng; XU Qi-ming

doi:10.3969/j.issn.1001-3806.2010.01.003

LASER TECHNOLOGY > 2010 > 34(1): 8-12. > DOI: 10.3969/j.issn.1001-3806.2010.01.003

LI Long, DONG Wu-wei, SHI Peng, GAN An-sheng, XU Qi-ming. Thermal effect of high power Yb：YAG microchip solid-state laser[J]. LASER TECHNOLOGY, 2010, 34(1): 8-12. DOI: 10.3969/j.issn.1001-3806.2010.01.003

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Thermal effect of high power Yb：YAG microchip solid-state laser

1.
Faculty of Science, Xi'an University of Architecture & Technology, Xi'an 710055, China;
2.
School of Materials Science and Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China

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Received Date: January 05, 2009
Revised Date: March 02, 2009
Published Date: January 24, 2010

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Abstract

Abstract

In order to study the nonuniform temperature rise and thermal effect in the Yb:YAG crystal, based on the theory of semi-analytical thermal analysis and working characteristic analysis of Yb:YAG microchip with super-Gaussian beam end-pumping and back-face cooling, a new solution of heat conduction equation was introduced and the general expressions of temperature field, thermal distortion field and additional optical path differences (OPD) of Yb:YAG microchip were obtained respectively. Some factors affecting the temperature distribution and thermal distortion of Yb:YAG microchip, such as the super-Gaussian beam with different orders,different spot radius, were quantitatively analyzed. If a Yb:YAG microchip with 0.08 atom fraction of ytterbium is end-pumped by the fifth order super-Gaussian beam with power of 50W in 300μm radius, its maximal temperature raise was up to 52.18℃ and its maximum thermal distortion was 0.1195μm and maximum additional OPD was 0.2152μm. The results can provide theoretical instruction for the heat insensitivity cavity design of microchip laser.
- lasers,
- microchip laser,
- Yb：YAG crystal,
- thermal effect,
- super-Gaussian beam,
- semi-analytical thermal analysis

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References

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