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

Oleg A. Louchev; Yoshiharu Urata; Norihito Saito; Satoshi Wada

doi:10.1117/12.751893

9 August 2007 Coupled thermo-optical modeling of high power operation of Tm, Ho:YLF solid-state lasers

Oleg A. Louchev, Yoshiharu Urata, Norihito Saito, Satoshi Wada

Proceedings Volume 6731, International Conference on Lasers, Applications, and Technologies 2007: Advanced Lasers and Systems; 67310D (2007) https://doi.org/10.1117/12.751893
Event: International Conference on Lasers, Applications, and Technologies '07, 2007, Minsk, Belarus

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.

Citation Download Citation

Oleg A. Louchev, Yoshiharu Urata, Norihito Saito, and Satoshi Wada "Coupled thermo-optical modeling of high power operation of Tm, Ho:YLF solid-state lasers", Proc. SPIE 6731, International Conference on Lasers, Applications, and Technologies 2007: Advanced Lasers and Systems, 67310D (9 August 2007); https://doi.org/10.1117/12.751893

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