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Proceedings Paper

Coupled thermo-optical modeling of high-power operation of Tm, Ho:YLF solid-state lasers
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Paper Abstract

Integrated computational model for operation of co-doped Tm,Ho solid-state lasers is developed coupling (i) 8-level rate equations with (ii) TEM00 laser beam distribution, and (iii) complex heat dissipation model. Simulations done for Q-switched ≈0.1 J giant pulse generation by Tm,Ho:YLF laser show that ≈43 % of the 780 nm light diode side-pumped energy is directly transformed into the heat inside the crystal, whereas ≈45 % is the spontaneously emitted radiation from 3F4, 5I7 , 3H4 and 3H5 levels. In water-cooled operation this radiation is absorbed inside the thermal boundary layer where the heat transfer is dominated by heat conduction. In high-power operation the resulting temperature increase is shown to lead to (i) significant decrease in giant pulse energy and (ii) thermal lensing.

Paper Details

Date Published: 9 August 2007
PDF: 10 pages
Proc. SPIE 6731, International Conference on Lasers, Applications, and Technologies 2007: Advanced Lasers and Systems, 67310D (9 August 2007); doi: 10.1117/12.751893
Show Author Affiliations
Oleg A. Louchev, Megaopto Co. Ltd. (Japan)
Yoshiharu Urata, Megaopto Co. Ltd. (Japan)
Norihito Saito, RIKEN (Japan)
Satoshi Wada, RIKEN (Japan)


Published in SPIE Proceedings Vol. 6731:
International Conference on Lasers, Applications, and Technologies 2007: Advanced Lasers and Systems

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