Theoretical and experimental investigation of thermal effect in end-pumped Tm,Ho:YLF lasers

Xinlu Zhang; Li Li; Jinhui Cui

doi:10.1117/12.753394

6 February 2008 Theoretical and experimental investigation of thermal effect in end-pumped Tm,Ho:YLF lasers

Xinlu Zhang, Li Li, Jinhui Cui

Proceedings Volume 6823, High-Power Lasers and Applications IV; 682305 (2008) https://doi.org/10.1117/12.753394
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

Thermal lensing in an end-pumped Tm,Ho:YLF laser crystal has been investigated with a theoretical model of continuous-wave (CW) quasi-three-level laser. Under considering energy transfer up-conversion (ETU) and ground state re-absorption (GSA), the rate equations are given. The influence of ETU on fractional thermal loading is calculated, and the results show that fractional thermal loading critically depends on the pump-to-mode size ratio. The temperature distributions of a Tm,Ho:YLF crystal under different pump powers have been analyzed. The output power and the focal length of the thermal lens as a function of pump power are obtained in experiment. The experimental results are compared with theoretical results, and the experimental results show that the theoretical results are reasonable.

Citation Download Citation

Xinlu Zhang, Li Li, and Jinhui Cui "Theoretical and experimental investigation of thermal effect in end-pumped Tm,Ho:YLF lasers", Proc. SPIE 6823, High-Power Lasers and Applications IV, 682305 (6 February 2008); https://doi.org/10.1117/12.753394

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