Cr:ZnMgSe laser pumped by 1.7 µm Er:YLF radiation

M. E. Doroshenko; H. Jelínková; M. Němec; J. Šulc; M. Jelínek; V. K. Komar; A. S. Gerasimenko; V. M. Puzikov; V. V. Badikov

doi:10.1117/12.2003848

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18 March 2013 Cr:ZnMgSe laser pumped by 1.7 μm Er:YLF radiation

M. E. Doroshenko, H. Jelínková, M. Němec, J. Šulc, M. Jelínek, V. K. Komar, A. S. Gerasimenko, V. M. Puzikov, V. V. Badikov

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Proceedings Volume 8599, Solid State Lasers XXII: Technology and Devices; 859921 (2013) https://doi.org/10.1117/12.2003848
Event: SPIE LASE, 2013, San Francisco, California, United States

Abstract

The aim of the presented work is to demonstrate operation of a Cr:ZnMgSe laser pumped by a Er:YLF laser. Laser output characteristics are compared with a Cr:ZnSe laser operated under similar conditions. Pumping 1.73 μm Er:YLF laser (Er:YLF rod 80 mm long, flashlamp-pumped) radiation was focused into the Cr:ZnMgSe or Cr:ZnSe active crystal (thickness 4.9 mm and 2.2 mm, respectively; absorption coeficient 4.5 and 10.9 cm^-1 @ 1.73 μm, respectively). The active crystal was inserted into the stable non-selective optical resonator or into the resonator with a wavelength-selective element. The 65 mm long non-selective resonator was formed by a flat dichroic pumping mirror (HT @ 1.74 μm, HR @ 2.4 μm), and a concave output coupler (R = 82 % @ 2.4 μm, r = 500 mm). The maximal output pulse energy and efficiency with respect to the absorbed pumping energy were measured 5.8 mJ and 36 % for the Cr:ZnMgSe laser, and 10.2 mJ and 76 % for the Cr:ZnSe laser. Central emission wavelength was 2.46 μm and 2.4 μm for the Cr:ZnMgSe and Cr:ZnSe laser, respectively. The spectral line-width was about 55 nm in both cases. In the case of 80 mm long output wavelength selective resonator the MgF₂ Lyot filter was inserted between the active crystal and the output coupler. Output wavelength tuning was obtained in the range 2.35 – 2.55 μm and 2.29 - 2.53 μm for the Cr:ZnMgSe and Cr:ZnSe laser, respectively. Maximum output energy was ~ 4 mJ in both cases.

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M. E. Doroshenko, H. Jelínková, M. Němec, J. Šulc, M. Jelínek, V. K. Komar, A. S. Gerasimenko, V. M. Puzikov, and V. V. Badikov "Cr:ZnMgSe laser pumped by 1.7 μm Er:YLF radiation", Proc. SPIE 8599, Solid State Lasers XXII: Technology and Devices, 859921 (18 March 2013); https://doi.org/10.1117/12.2003848

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