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

Jan Sulc; Helena Jelinkova; Vaclav Kubecek; Karel Nejezchleb; Karel Blazek

doi:10.1117/12.459000

13 March 2002 Comparison of different composite Nd:YAG rods thermal properties under diode pumping

Jan Sulc, Helena Jelinkova, Vaclav Kubecek, Karel Nejezchleb, Karel Blazek

Proceedings Volume 4630, Solid State Lasers XI; (2002) https://doi.org/10.1117/12.459000
Event: High-Power Lasers and Applications, 2002, San Jose, California, United States

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.

Citation Download Citation

Jan Sulc, Helena Jelinkova, Vaclav Kubecek, Karel Nejezchleb, and Karel Blazek "Comparison of different composite Nd:YAG rods thermal properties under diode pumping", Proc. SPIE 4630, Solid State Lasers XI, (13 March 2002); https://doi.org/10.1117/12.459000

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