Research on output characteristics of continuous-wave operation of Ho:YAG laser pumped by Tm:YLF laser

Xinyu Chen; Jiaqi Bie; Zhulong Huang; Xuedi Song; Guangyong Jin

doi:10.1117/12.2034596

17 September 2013 Research on output characteristics of continuous-wave operation of Ho:YAG laser pumped by Tm:YLF laser

Xinyu Chen, Jiaqi Bie, Zhulong Huang, Xuedi Song, Guangyong Jin

Author Affiliations +

Proceedings Volume 8904, International Symposium on Photoelectronic Detection and Imaging 2013: High Power Lasers and Applications; 890419 (2013) https://doi.org/10.1117/12.2034596
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

It report a continuous wave Ho:YAG laser pumped by1.91 μm Tm Laser. It important to thesis analyzed the output characteristics of Ho laser pumped by continuous Tm laser.The rate equation of Ho laser in continuous-wave operation was put forward. The rate equation was solved to analyze the influence of upconversion effect to the output power, slope efficiency and threshold power in CW operation .The transition branching ratio between the energy levels was taken into consideration while discussing the influence of up conversion.Through the simulation analysis on the output characteristics, consider the influence of upconversion effect than to ignore the influence of upconversion effect, The threshold power increased by 0.34W, the highest output power of the reduced 2.89W, the slope efficiency was decreased by 16.1%.Respectively，For all the experiments, the Tm:YLF laser crystal keeps 292K and the temperature control method is water cooling. When we applied L shape plano concave resonator, the length of the resonator is100mm, the radius of curvature output mirror is 150mm and the temperature of theHo:YAG laser crystal is 292K, we observed the central laser wavelength is 2.09μm. The highest output power reaches 8.23W when the totally input pump power is18W. And the slope efficiency is 45.7%, respectively. The experimental results are coincide with the theory.

Citation Download Citation

Xinyu Chen, Jiaqi Bie, Zhulong Huang, Xuedi Song, and Guangyong Jin "Research on output characteristics of continuous-wave operation of Ho:YAG laser pumped by Tm:YLF laser", Proc. SPIE 8904, International Symposium on Photoelectronic Detection and Imaging 2013: High Power Lasers and Applications, 890419 (17 September 2013); https://doi.org/10.1117/12.2034596

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KEYWORDS

Holmium

Upconversion

Laser damage threshold

Laser crystals

Crystals

Mirrors

Reflectivity

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