Temperature dependent absorption and emission spectra of Tm:CaF2

Jürgen Reiter; Jörg Körner; Jan Pejchal; Akira Yoshikawa; Joachim Hein; Malte C. Kaluza

doi:10.1364/OME.393890

Temperature dependent absorption and emission spectra of Tm:CaF₂

Jürgen Reiter, Jörg Körner, Jan Pejchal, Akira Yoshikawa, Joachim Hein, Malte C. Kaluza

Materials Design Division

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

We present Emission and absorption cross sections of thulium doped calcium fluoride (Tm:CaF₂) in the visible to short wave infrared (SWIR) wavelength range for temperatures between 80 K and 300 K. For spectral regions of high and low absorption the McCumber relation and the Fuchtbauer-Ladenburg equation have been used to give reliable results. Furthermore, an estimation for the cross relaxation efficiency is derived from the emission spectra as a function of doping concentration and temperature. In addition, nearly re-absorption-free fluorescence lifetimes for various doping concentrations were studied. It was found that a double exponential fit model is better suited than a migration model to represent the fluorescence decay curves. The measurement results are interpreted in the light of the application of Tm:CaF₂ as an efficient active medium in high-energy class diode-pumped solid state lasers.

Original language	English
Pages (from-to)	2142-2158
Number of pages	17
Journal	Optical Materials Express
Volume	10
Issue number	9
DOIs	https://doi.org/10.1364/OME.393890
Publication status	Published - 2020 Sept 1

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials

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10.1364/OME.393890

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title = "Temperature dependent absorption and emission spectra of Tm:CaF2",

abstract = "We present Emission and absorption cross sections of thulium doped calcium fluoride (Tm:CaF2) in the visible to short wave infrared (SWIR) wavelength range for temperatures between 80 K and 300 K. For spectral regions of high and low absorption the McCumber relation and the Fuchtbauer-Ladenburg equation have been used to give reliable results. Furthermore, an estimation for the cross relaxation efficiency is derived from the emission spectra as a function of doping concentration and temperature. In addition, nearly re-absorption-free fluorescence lifetimes for various doping concentrations were studied. It was found that a double exponential fit model is better suited than a migration model to represent the fluorescence decay curves. The measurement results are interpreted in the light of the application of Tm:CaF2 as an efficient active medium in high-energy class diode-pumped solid state lasers.",

author = "J{\"u}rgen Reiter and J{\"o}rg K{\"o}rner and Jan Pejchal and Akira Yoshikawa and Joachim Hein and Kaluza, {Malte C.}",

note = "Funding Information: Th{\"u}ringer Ministerium f{\"u}r Wirtschaft, Wissenschaft und Digitale Gesellschaft (2016FE9058); LASERLAB-EUROPE (654148); Bundesministerium f{\"u}r Bildung und Forschung (03VNE2068D, 03Z1H531, 03ZIK445, 05P15SJFA1). The authors would like to thank Hellma Materials GmbH in Jena for the processing and polishing of the raw Tm:CaF2 crystals. Furthermore, we would like to thank Julius Irrek and Finn Kohrell for the help in the measurements of the selective excitation of the 3H4 manifold. Publisher Copyright: {\textcopyright} 2020 Optical Society of America.",

year = "2020",

month = sep,

day = "1",

doi = "10.1364/OME.393890",

language = "English",

volume = "10",

pages = "2142--2158",

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TY - JOUR

T1 - Temperature dependent absorption and emission spectra of Tm:CaF2

AU - Reiter, Jürgen

AU - Körner, Jörg

AU - Pejchal, Jan

AU - Yoshikawa, Akira

AU - Hein, Joachim

AU - Kaluza, Malte C.

N1 - Funding Information: Thüringer Ministerium für Wirtschaft, Wissenschaft und Digitale Gesellschaft (2016FE9058); LASERLAB-EUROPE (654148); Bundesministerium für Bildung und Forschung (03VNE2068D, 03Z1H531, 03ZIK445, 05P15SJFA1). The authors would like to thank Hellma Materials GmbH in Jena for the processing and polishing of the raw Tm:CaF2 crystals. Furthermore, we would like to thank Julius Irrek and Finn Kohrell for the help in the measurements of the selective excitation of the 3H4 manifold. Publisher Copyright: © 2020 Optical Society of America.

PY - 2020/9/1

Y1 - 2020/9/1

N2 - We present Emission and absorption cross sections of thulium doped calcium fluoride (Tm:CaF2) in the visible to short wave infrared (SWIR) wavelength range for temperatures between 80 K and 300 K. For spectral regions of high and low absorption the McCumber relation and the Fuchtbauer-Ladenburg equation have been used to give reliable results. Furthermore, an estimation for the cross relaxation efficiency is derived from the emission spectra as a function of doping concentration and temperature. In addition, nearly re-absorption-free fluorescence lifetimes for various doping concentrations were studied. It was found that a double exponential fit model is better suited than a migration model to represent the fluorescence decay curves. The measurement results are interpreted in the light of the application of Tm:CaF2 as an efficient active medium in high-energy class diode-pumped solid state lasers.

AB - We present Emission and absorption cross sections of thulium doped calcium fluoride (Tm:CaF2) in the visible to short wave infrared (SWIR) wavelength range for temperatures between 80 K and 300 K. For spectral regions of high and low absorption the McCumber relation and the Fuchtbauer-Ladenburg equation have been used to give reliable results. Furthermore, an estimation for the cross relaxation efficiency is derived from the emission spectra as a function of doping concentration and temperature. In addition, nearly re-absorption-free fluorescence lifetimes for various doping concentrations were studied. It was found that a double exponential fit model is better suited than a migration model to represent the fluorescence decay curves. The measurement results are interpreted in the light of the application of Tm:CaF2 as an efficient active medium in high-energy class diode-pumped solid state lasers.

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Temperature dependent absorption and emission spectra of Tm:CaF₂

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