Room temperature Fe2+:ZnS laser

K. N. Firsov; E. M. Gavrishchuk; V. B. Ikonnikov; S. Yu. Kazantsev; I. G. Kononov; S. A. Rodin; D. V. Savin; N. A. Timofeeva

doi:10.1117/12.2224735

15 December 2015 Room temperature Fe²⁺:ZnS laser

K. N. Firsov, E. M. Gavrishchuk, V. B. Ikonnikov, S. Yu. Kazantsev, I. G. Kononov, S. A. Rodin, D. V. Savin, N. A. Timofeeva

Author Affiliations +

Proceedings Volume 9810, International Conference on Atomic and Molecular Pulsed Lasers XII; 98100W (2015) https://doi.org/10.1117/12.2224735
Event: XII International Conference on Atomic and Molecular Pulsed Lasers, 2015, Tomsk, Russian Federation

Abstract

Characteristics of a laser on polycrystalline ZnS:Fe²⁺ subjected from two sides to diffuse doping at room temperature are investigated. The sample was pumped by a non-chain electrodischarge HF laser with the radiation pulse FWHM duration of ~140 ns. The diameter of pumping radiation spot on the surface of crystal was 3.8 mm. Further increase of the size of pumping spot was limited by parasitic generation arising due to a high concentration of Fe ions in the near-surface layer of sample at a relatively small depth of doping (short length of active medium). The output energy of ZnS:Fe²⁺ laser was 25.5 mJ at the slope efficiency with respect to the energy absorbed in the crystal of 20%. Characteristics of lasers on polycrystalline ZnS:Fe²⁺ and ZnSe:Fe²⁺ have been compared in equal pumping conditions. The slope efficiency of ZnSe:Fe²⁺ laser was 34%. At equal pumping energy absorbed in the samples, the duration of ZnSe:Fe²⁺ laser radiation pulse was longer than that of ZnS:Fe²⁺ laser. Possibilities of increasing the efficiency of ZnS:Fe²⁺ laser operation at room temperature by improving the technology of sample manufacturing and reducing the duration of pumping pulse are discussed.

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K. N. Firsov, E. M. Gavrishchuk, V. B. Ikonnikov, S. Yu. Kazantsev, I. G. Kononov, S. A. Rodin, D. V. Savin, and N. A. Timofeeva "Room temperature Fe²⁺:ZnS laser", Proc. SPIE 9810, International Conference on Atomic and Molecular Pulsed Lasers XII, 98100W (15 December 2015); https://doi.org/10.1117/12.2224735

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KEYWORDS

Crystals

Laser crystals

Pulsed laser operation

Hydrogen fluoride lasers

Laser energy

Mirrors

Energy efficiency

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