Influence of Nd3+ and Yb3+ concentration on the Nd3+→Yb3+ energy-transfer efficiency in the YAl3(BO3)4 nonlinear crystal: determination of optimum concentrations for laser applications

Daniel Jaque; Maria de la O Ramirez; Luisa Bausá; Adolfo Speghini; Marco Bettinelli; Enrico Cavalli

doi:10.1364/JOSAB.21.001203

Influence of Nd³⁺ and Yb³⁺ concentration on the Nd³⁺ → Yb³⁺ energy-transfer efficiency in the YAl₃(BO₃)₄ nonlinear crystal: determination of optimum concentrations for laser applications

Daniel Jaque, Maria de la O Ramirez, Luisa Bausá, Adolfo Speghini, Marco Bettinelli, and Enrico Cavalli

Journal of the Optical Society of America B
Vol. 21,
Issue 6,
pp. 1203-1209
(2004)
•https://doi.org/10.1364/JOSAB.21.001203

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Daniel Jaque, Maria de la O Ramirez, Luisa Bausá, Adolfo Speghini, Marco Bettinelli, and Enrico Cavalli, "Influence of Nd³⁺ and Yb³⁺ concentration on the Nd³⁺→Yb³⁺ energy-transfer efficiency in the YAl₃(BO₃)₄ nonlinear crystal: determination of optimum concentrations for laser applications," J. Opt. Soc. Am. B 21, 1203-1209 (2004)

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- Materials (160.0160)
- Laser materials (160.3380)

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Abstract

The ${Nd}^{3 +} \to {Yb}^{3 +}$ energy-transfer efficiency in the ${YAl}_{3} ({BO}_{3})_{4}$ nonlinear laser crystal has been investigated as a function of both donor $({Nd}^{3 +})$ and acceptor $({Yb}^{3 +})$ concentrations. An analytical expression giving the value of the energy-transfer rate for any ${Nd}^{3 +}$ and ${Yb}^{3 +}$ concentrations has been obtained on the basis of the analysis of experimental data. From this expression, a basic model is proposed to determine the ${Nd}^{3 +}$ and ${Yb}^{3 +}$ concentrations that optimize the ${Yb}^{3 +}$ output laser power obtained from a 808-nm diode-pumped ${Nd}^{3 +};$ ${Yb}^{3 +} : {YAl}_{3} ({BO}_{3})_{4}$ crystal.

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	${Yb}^{3 +} : YAB$	${Nd}^{3 +} : YAB$
$σ_{abs}$ (at 808 nm)	0	1 (cm at. %)^-1 (Ref. 21)
$σ_{em}$	$1 \times 10^{- 20} {cm}^{2}$ (Ref. 7) (at 1040 nm)	$2 \times 10^{- 19} {cm}^{2}$ (Ref. 7) (at 1062 nm)
$τ_{F}$	650 µs (Ref. 13)	$τ_{Nd} = \frac{60 µ s}{1 + 0.02 x}$ (x in at. % units) (Ref. 15)
L	1% cm^-1 (Ref. 1)	1% cm^-1 (Ref. 8)
$σ_{abs}$ (at 1040 nm)	0.007 (cm at. %)^-1 (Ref. 1)	0
$σ_{ESA}$ (1040 nm)	0	$0.57 \times 10^{- 20} ({cm}^{2})$ (Ref. 19)

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