Polycrystaline Cr:ZnSe laser pumped by efficient Tm:YLF laser

Lukasz F. Gorajek; Jan K. Jabczynski

doi:10.1117/12.2036353

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28 February 2014 Polycrystaline Cr:ZnSe laser pumped by efficient Tm:YLF laser

Lukasz F. Gorajek, Jan K. Jabczynski

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Proceedings Volume 8959, Solid State Lasers XXIII: Technology and Devices; 89590D (2014) https://doi.org/10.1117/12.2036353
Event: SPIE LASE, 2014, San Francisco, California, United States

Abstract

Efficient generation of diode pumped Tm:YLF laser end-pumped by 25-W laser diode bar was demonstrated. Above 5 W of output power has been obtained. The output spectrum was centered at 1908-nm with <15 nm linewidth. In active Q-switching mode, for 20-Hz repetition rate, up to 5.5 mJ output energy with a pulse duration of 11 ns was achieved. Further pulse energy scaling up was limited by the damage of laser elements. The divergence angle was about 3.5 mrad and estimated parameter M² < 1.15. We also report mid-infrared laser generation at 2488 nm with a linewidth of ~60 nm in a polycrystalline Cr:ZnSe active medium. In a free-running regime, for 80 mJ incident pump energy, 3 mJ of output pulse energy was achieved.

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Lukasz F. Gorajek and Jan K. Jabczynski "Polycrystaline Cr:ZnSe laser pumped by efficient Tm:YLF laser", Proc. SPIE 8959, Solid State Lasers XXIII: Technology and Devices, 89590D (28 February 2014); https://doi.org/10.1117/12.2036353

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