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Comparison of different composite Nd:YAG rods thermal properties under diode pumping
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Paper Abstract

Thinking about the pumping and generated power of the longitudinally diode-pumped solid-state laser enhancement, the question of an active material cooling should be solved. One of the possible solutions is the active material cooling surface enlargement. Besides the cylindrical surface of the crystal, the laser rod front surfaces could be cooled through undoped ends. The temperature gradient effect in three various samples was investigated in a computer experiment, and the differences in generated output power were measured experimentally. The samples were three Nd:YAG rods - one conventional, one with one undoped end, and one with two undoped ends. The crystal samples were placed in sequence into a resonator 6 cm long and longitudinally diode-pumped. The dependencies of the generated power on the absorbed pump power have shown that with the two undoped ends the output power is more than twice as high as against the conventional Nd:YAG sample. The results were explained by a computer experiment based on the heat transfer equation solution where the changes of the temperature gradient were least for the Nd:YAG rod with two undoped ends.

Paper Details

Date Published: 13 March 2002
PDF: 7 pages
Proc. SPIE 4630, Solid State Lasers XI, (13 March 2002); doi: 10.1117/12.459000
Show Author Affiliations
Jan Sulc, Czech Technical Univ. (Czech Republic)
Helena Jelinkova, Czech Technical Univ. (Czech Republic)
Vaclav Kubecek, Czech Technical Univ. (Czech Republic)
Karel Nejezchleb, Crytur Ltd. (Czech Republic)
Karel Blazek, Crytur Ltd. (Czech Republic)

Published in SPIE Proceedings Vol. 4630:
Solid State Lasers XI
Richard Scheps, Editor(s)

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