Laser performance of Cr2+-doped ZnS

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

doi:10.1117/12.424597

16 April 2001 Laser performance of Cr2^+-doped ZnS

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

Author Affiliations +

Proceedings Volume 4267, Solid State Lasers X; (2001) https://doi.org/10.1117/12.424597
Event: Photonics West 2001 - LASE, 2001, San Jose, CA, United States

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.

Citation Download Citation

Keith Graham, Sergey B. Mirov, Vladimir V. Fedorov, Mary Ellen Zvanut, Andranik G. Avanesov, Valery V. Badikov, Boris Ignat'ev, Vladimir Panutin, and Galina S. Shevyrdayeva "Laser performance of Cr2^+-doped ZnS", Proc. SPIE 4267, Solid State Lasers X, (16 April 2001); https://doi.org/10.1117/12.424597

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