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Proceedings Paper

Four micron radiation generated by dysprosium doped lead thiogallate laser
Author(s): M. E. Doroshenko; T. T. Basiev; V. V. Osiko; H. Jelínková; J. Šulc; M. Jelinek; M. Fibrich; V. V. Badikov
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Paper Abstract

The lead thiogallate (Dy:PbGa2S4) crystal doped with trivalent dysprosium ions was used as a laser active medium for obtaining radiation in mid-IR spectral region. To prove in-band pumping, the Er:YAP laser generating 1.66 μm radiation was used. This radiation was focused by CaF2 lens (f = 100 mm) on the investigated Dy:PbGa2S4 crystal placed inside the resonator formed by an in-coupling flat-dichroic mirror with low reflectivity at pumping wavelength and with high reflectivity within the 4-5 μm spectral range, and by an out-coupling concave mirror (500 mm curvature) with reflectances of 86%, 88%, 89%, and 93% at 4325 nm. Three Dy:PbGa2S4 active crystals were investigated. The Dy:PbGa2S4 laser was working at room temperature without any cooling. The maximal reached output energy was as high as 275 μJ for the optimal mirror reflectance and the best Dy:PbGa2S4 crystal. The incident pumping energy was 132 mJ. The measured output radiation wavelength was 4332 nm with the spectral width of 62 nm. From the point of efficiency it was recognized that the in-band pumping directly into 6H11/2 level results in decrease of lasing threshold and increase of slope efficiency.

Paper Details

Date Published: 17 February 2010
PDF: 5 pages
Proc. SPIE 7578, Solid State Lasers XIX: Technology and Devices, 757825 (17 February 2010); doi: 10.1117/12.839670
Show Author Affiliations
M. E. Doroshenko, General Physics Institute (Russian Federation)
T. T. Basiev, General Physics Institute (Russian Federation)
V. V. Osiko, General Physics Institute (Russian Federation)
H. Jelínková, Czech Technical Univ. in Prague (Czech Republic)
J. Šulc, Czech Technical Univ. in Prague (Czech Republic)
M. Jelinek, Czech Technical Univ. in Prague (Czech Republic)
M. Fibrich, Czech Technical Univ. in Prague (Czech Republic)
V. V. Badikov, Kuban State Univ. (Russian Federation)

Published in SPIE Proceedings Vol. 7578:
Solid State Lasers XIX: Technology and Devices
W. Andrew Clarkson; Norman Hodgson; Ramesh K. Shori, Editor(s)

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