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Optical properties of nonstoichiometric fluorite crystals doped with Nd3+ and Pr3+ in 1.3-um spectral range
Author(s): 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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Paper Abstract

Optical properties with more than 120 multicomponent nonstoichiometric fluoride crystals M+,2+Fm-R3+Fn 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 Na0.4Y0.6F2.2 and Ca0.9Y0.1F2.1 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 Ba1-xGdxF2+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.

Paper Details

Date Published: 1 March 1995
PDF: 12 pages
Proc. SPIE 2498, Laser Methods of Surface Treatment and Modification: ALT '94 International Conference, (1 March 1995); doi: 10.1117/12.203628
Show Author Affiliations
M. Yu. Sharonov, Institute of Crystallography (Russia)
B. K. Sevastyanov, Institute of Crystallography (Russia)
Z. I. Zmurova, Institute of Crystallography (Russia)
Elena A. Krivandina, Institute of Crystallography (Russia)
A. A. Bystrova, Institute of Crystallography (Russia)
I. I. Buchinskaya, Institute of Crystallography (Russia)
B. P. Sobolev, Institute of Crystallography (Russia)

Published in SPIE Proceedings Vol. 2498:
Laser Methods of Surface Treatment and Modification: ALT '94 International Conference
Alexander M. Prokhorov; Vladimir I. Pustovoy, Editor(s)

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