A highly efficient resonantly pumped Ho:YAG laser

Jacek Kwiatkowski; Jan K. Jabczynski; Waldemar Zendzian; Jacek Swiderski; Mateusz Kaskow; Lukasz Gorajek

doi:10.1117/12.921757

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15 May 2012 A highly efficient resonantly pumped Ho:YAG laser

Jacek Kwiatkowski; Jan K. Jabczynski; Waldemar Zendzian; Jacek Swiderski; Mateusz Kaskow; Lukasz Gorajek

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Proceedings Volume 8433, Laser Sources and Applications; 84331J (2012) https://doi.org/10.1117/12.921757
Event: SPIE Photonics Europe, 2012, Brussels, Belgium

Abstract

An efficient high-peak-power Ho:YAG hybrid laser resonantly pumped by a 20 W linearly polarized Tm:fiber laser at the wavelength of 1908 nm was developed. At room temperature a maximum continuous output power of 10.7 W with a slope efficiency of over 55% with respect to the incident pump power was achieved. In Q-switching regime an acousto-optic modulators were applied. The research was conducted for normal and Brewster's angle Q-switches respectively. In CW pumping regime the repetition rate was changed from 500 Hz to 5000 Hz. For the best case, for 5 kHz repetition rate, pulses of 1.6 mJ energy and 123 kW peak-power were achieved at the wavelength of 2090.2 nm with an M² ≈ 1.6.

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Jacek Kwiatkowski, Jan K. Jabczynski, Waldemar Zendzian, Jacek Swiderski, Mateusz Kaskow, and Lukasz Gorajek "A highly efficient resonantly pumped Ho:YAG laser", Proc. SPIE 8433, Laser Sources and Applications, 84331J (15 May 2012); https://doi.org/10.1117/12.921757

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