Optical properties of nonstoichiometric fluorite crystals doped with Nd3+ and Pr3+ in 1.3-um spectral range

M. Yu. Sharonov; B. K. Sevastyanov; Z. I. Zmurova; Elena A. Krivandina; A. A. Bystrova; I. I. Buchinskaya; B. P. Sobolev

doi:10.1117/12.203628

1 March 1995 Optical properties of nonstoichiometric fluorite crystals doped with Nd³+ and Pr³+ in 1.3-um spectral range

M. Yu. Sharonov, B. K. Sevastyanov, Z. I. Zmurova, Elena A. Krivandina, A. A. Bystrova, I. I. Buchinskaya, B. P. Sobolev

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Proceedings Volume 2498, Laser Methods of Surface Treatment and Modification: ALT '94 International Conference; (1995) https://doi.org/10.1117/12.203628
Event: Laser Methods of Surface Treatment and Modification: ALT '94 International Conference, 1994, Konstanz, Germany

Abstract

Optical properties with more than 120 multicomponent nonstoichiometric fluoride crystals M^+,2+F_m-R³⁺F_n with CaF₂ structure doped with Nd³⁺ and Pr³⁺ were studied especially in 1.3 micrometers spectral range which is promising for operation in the second telecommunication window. The direct measurements of excited state absorption and single pass gain in 1.3 micrometers range have been carried out for Na_0.4Y_0.6F_2.2 and Ca_0.9Y_0.1F_2.1 crystals. The effective cross-sections and halfwidth of gain band have been determined ((sigma) _max equals 2.2 +/- 0.7 10^-21 cm², (Delta) equals 40 cm^-1 and (sigma) _max equals 4.5 +/- 0.9 10^-21 cm², (delta) equals 60 cm^-1, respectively). The line's strengths in Ba_1-xGd_xF_2+x:Pr crystals has been found to be raised in nonstoichiometric crystals in comparison with stoichiometric ones due to formation of another type of optical centers. The energy of destruction of these Pr³⁺ positions has been determined to be 280 cm^-1. The mean decay rate of Yb³⁺ is found to be proportional to the multiplying of Yb³⁺ and Pr³⁺ concentrations in Yb³⁺ sensibilized BaGdF:Yb,Pr and PbCdF:Yb,Pr crystals. The optimal concentrations of Yb and Pr and single pass gain coefficient have been calculated.

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M. Yu. Sharonov, B. K. Sevastyanov, Z. I. Zmurova, Elena A. Krivandina, A. A. Bystrova, I. I. Buchinskaya, and B. P. Sobolev "Optical properties of nonstoichiometric fluorite crystals doped with Nd³+ and Pr³+ in 1.3-um spectral range", Proc. SPIE 2498, Laser Methods of Surface Treatment and Modification: ALT '94 International Conference, (1 March 1995); https://doi.org/10.1117/12.203628

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KEYWORDS

Crystals

Ions

Absorption

Luminescence

Ytterbium

Fluorite

Fluorine

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