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Proceedings Paper

Laser performance of Cr2+-doped ZnS
Author(s): Keith Graham; Sergey B. Mirov; Vladimir V. Fedorov; Mary Ellen Zvanut; Andranik G. Avanesov; Valery V. Badikov; Boris Ignat'ev; Vladimir Panutin; Galina S. Shevyrdayeva
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Paper Abstract

Laser properties and spectroscopic characterization of diffusion doped Cr2+: ZnS crystals synthesized by chemical transport reaction from gas phase are reported. Lasing was realized with a threshold of 170 ?J and slope efficiency of 9.5 % with respect to the 1.5607 ?m pump energy, in a hemispherical cavity. Low doped samples (3-4 cm-1 at 1.7 ?m) of 1.7 mm thickness were utilized. The 1.5607 ?m excitation was realized with a D2 Raman cell pumped in a backscattering geometry by the 1.064 ?m radiation of the single frequency Nd:YAG laser. Maximum output energy reached 100 ?J. Lasing in the hemispherical cavity was achieved with output couplers R2.36?m=80 % and 90 % and radius of curvature 20 cm. Absorption cross section was estimated from spectroscopic measurements and was in a good agreement with saturation data (?abs.= 0.80x10-18 cm2) calculated with the modified Frantz-Nodvik equation for a four level slow absorber. Findlay Clay losses were found to be about 14%. Selective cavity experiments were performed in a hemispherical cavity with a CaF2 prism as the dispersive element. A tuning range of 2.05-2.40 ?m was realized, limited by the spectral range of the output coupler of the selective laser cavity.

Paper Details

Date Published: 16 April 2001
PDF: 8 pages
Proc. SPIE 4267, Solid State Lasers X, (16 April 2001); doi: 10.1117/12.424597
Show Author Affiliations
Keith Graham, Univ. of Alabama/Birmingham (United States)
Sergey B. Mirov, Univ. of Alabama/Birmingham (United States)
Vladimir V. Fedorov, Univ. of Alabama/Birmingham (United States)
Mary Ellen Zvanut, Univ. of Alabama/Birmingham (United States)
Andranik G. Avanesov, Kuban State Univ. (Russia)
Valery V. Badikov, Kuban State Univ. (Russia)
Boris Ignat'ev, Kuban State Univ. (Russia)
Vladimir Panutin, Kuban State Univ. (Russia)
Galina S. Shevyrdayeva, Kuban State Univ. (Russia)

Published in SPIE Proceedings Vol. 4267:
Solid State Lasers X
Richard Scheps, Editor(s)

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