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Proceedings Paper

The investigations of tunable, high peak power, diode pumped Tm:YLF laser
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Paper Abstract

The numerical model of Q-switching regime for quasi-III-level laser including thermal effects was developed and verified with experiment. The room-temperature, high repetition rate, actively Q-switched Tm:YLF oscillator operating near 2-μm wavelength was constructed and examined. The 25-W fiber coupled laser diode with emission spectrum centered at 792-nm wavelength was deployed as a pump source. We have demonstrated in a short linear cavity above 5 W of output power for CW pumping and above 7 W for quasi-CW pumping regime (10 Hz repetition rate, 10 ms pump duration). The divergence angle was about 2.6 mrad, beam quality parameter M2 < 1.1 for higher pump level. Applying 2-plates Lyot's filter, the continuous tuning in the range of 1845-1935 nm was achieved. The linewidth of tunable spectrum was less than 0.7 nm for all pump power range. The acousto-optic modulator made of fused silica was deployed for Q-switching. For the quasi-CW regime of pumping, the maximum Q-switched energy was 10.5 mJ with pulse duration of 22 ns corresponding to near 450 kW of peak power. For CW pumping regime we also demonstrated above 10 mJ for the repetition rate of 133 Hz, however with longer, 46-ns pulse duration as a result of significant increase in temperature of crystal. The output energy and peak power were limited in Q-switching regime by damages of applied laser elements.

Paper Details

Date Published: 20 November 2008
PDF: 6 pages
Proc. SPIE 7141, 16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 71410A (20 November 2008); doi: 10.1117/12.822355
Show Author Affiliations
Jan K. Jabczyński, Military Univ. of Technology (Poland)
Lukasz Gorajek, Military Univ. of Technology (Poland)
Waldemar Zendzian, Military Univ. of Technology (Poland)
Jacek Kwiatkowski, Military Univ. of Technology (Poland)
Helena Jelinkova, Czech Technical Univ. (Czech Republic)
Jan Sulc, Czech Technical Univ. (Czech Republic)
Michal Nemec, Czech Technical Univ. (Czech Republic)

Published in SPIE Proceedings Vol. 7141:
16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics
Agnieszka Popiolek-Masajada; Elzbieta Jankowska; Waclaw Urbanczyk, Editor(s)

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