Temperature-Dependent Stimulated Emission Cross-Section in Nd3+:YLF Crystal

Spectroscopic properties of neodymium-doped yttrium lithium fluoride were measured at different temperatures from 35 K to 350 K in specimens with 1 at% Nd3+ concentration. The absorption spectrum was measured at room temperature from 400 to 900 nm. The decay dynamics of the 4F3/2 multiplet was inves...

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Bibliographic Details
Published in:Materials 2021-01, Vol.14 (2), p.431
Main Authors: Turri, Giorgio, Webster, Scott, Bass, Michael, Toncelli, Alessandra
Format: Article
Language:English
Subjects:
Absorption spectra
Cross-sections
Decay
Estimates
Fluorescence
Investigations
Lasers
Light
Lithium
Lithium fluoride
Neodymium
Room temperature
Spectrum analysis
Stimulated emission
Temperature dependence
Yttrium
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Summary:Spectroscopic properties of neodymium-doped yttrium lithium fluoride were measured at different temperatures from 35 K to 350 K in specimens with 1 at% Nd3+ concentration. The absorption spectrum was measured at room temperature from 400 to 900 nm. The decay dynamics of the 4F3/2 multiplet was investigated by measuring the fluorescence lifetime as a function of the sample temperature, and the radiative decay time was derived by extrapolation to 0 K. The stimulated-emission cross-sections of the transitions from the 4F3/2 to the 4I9/2, 4I11/2, and 4I13/2 levels were obtained from the fluorescence spectrum measured at different temperatures, using the Aull–Jenssen technique. The results show consistency with most results previously published at room temperature, extending them over a broader range of temperatures. A semi-empirical formula for the magnitude of the stimulated-emission cross-section as a function of temperature in the 250 K to 350 K temperature range, is presented for the most intense transitions to the 4I11/2 and 4I13/2 levels.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14020431