Mid-infrared luminescence properties of Dy-doped silver halide crystals

Irena Shafir; Ariel Nause; Lev Nagli; Michael Rosenbluh; Abraham Katzir

doi:10.1364/AO.50.001625

Mid-infrared luminescence properties of Dy-doped silver halide crystals

Irena Shafir, Ariel Nause, Lev Nagli, Michael Rosenbluh, and Abraham Katzir

Applied Optics
Vol. 50,
Issue 11,
pp. 1625-1630
(2011)
•https://doi.org/10.1364/AO.50.001625

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Irena Shafir, Ariel Nause, Lev Nagli, Michael Rosenbluh, and Abraham Katzir, "Mid-infrared luminescence properties of Dy-doped silver halide crystals," Appl. Opt. 50, 1625-1630 (2011)

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Related Topics
Table of Contents Category
- Spectroscopy
Optics & Photonics Topics
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The topics in this list come from the OSA Optics and Photonics Topics applied to this article.
Previously assigned OCIS codes
- Optical properties (160.4760)
- Rare-earth-doped materials (160.5690)
- Absorption (300.1030)
- Emission (300.2140)

About this Article
History
- Original Manuscript: January 4, 2011
- Manuscript Accepted: February 12, 2011
- Published: April 8, 2011

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Abstract

The absorption and the kinetics of the emission in the mid-infrared (mid-IR) were investigated in ${AgCl}_{x} {Br}_{1 - x}$ crystals doped with ${Dy}^{3 +}$ ions. Strong emission bands were detected at 3, 4.4, and $5.5 μm$ and attributed to the ${}^{6}{H_{13 / 2}} \to {}^{6}{H_{15 / 2}}$ , ${}^{6}{H_{11 / 2}} \to {}^{6}{H_{13 / 2}}$ , and ${}^{6}{F_{11 / 2}} + {}^{6}{H_{9 / 2}} \to {}^{6}{H_{11 / 2}}$ transitions. Various optical parameters were calculated for the ${Dy}^{3 +}$ doped crystals, using the Judd–Ofelt approximation and the rate equations. The measured results and the calculated parameters indicate that these doped crystals could be used for the development of mid-IR solid-state lasers or mid-IR fiber lasers.

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Observed Luminescence Transitions	Transition Wavelength $(μm)$	$τ_{meas}$ (ms)	$τ_{calc}$ (ms)	$A_{J J^{'}}$ ( $s^{- 1}$ )	$β_{calc}$ (%)	η (%)
${}^{6}{F_{11 / 2}} + {}^{6}{H_{9 / 2}} \to {}^{6}{H_{11 / 2}}$	5.5	1.8	2.1	4.8	1	86
${}^{6}{F_{11 / 2}} + {}^{6}{H_{9 / 2}} \to {}^{6}{H_{13 / 2}}$	2.4			24.6	5.1
${}^{6}{H_{11 / 2}} \to {}^{6}{H_{15 / 2}}$	1.7	11.6	35.4	17	60.5	33
${}^{6}{H_{11 / 2}} \to {}^{6}{H_{13 / 2}}$	4.4			11.1	39.5
${}^{6}{H_{13 / 2}} \to {}^{6}{H_{15 / 2}}$	3	22.4	34.5	29	100	65

Sample	Decay Time (ms) ${}^{6}{H_{13 / 2}}$	Decay Time (ms) ${}^{6}{H_{11 / 2}}$	Rise Time (ms) ${}^{6}{F_{11 / 2}} + {}^{6}{H_{9 / 2}}$
Dy:AgBr	24.1	12.5	1.84
$Dy : {AgBr}_{0.5} {Cl}_{0.5}$	22.4	11.6 (13 at $20 K$ )	1.8
Dy:AgCl	-	10.1	1.57

Observed Luminescence Transitions	Transition Wavelength $(μm)$	$τ_{meas}$ (ms)	$τ_{calc}$ (ms)	$A_{J J^{'}}$ ( $s^{- 1}$ )	$β_{calc}$ (%)	η (%)
${}^{6}{F_{11 / 2}} + {}^{6}{H_{9 / 2}} \to {}^{6}{H_{11 / 2}}$	5.5	1.8	2.1	4.8	1	86
${}^{6}{F_{11 / 2}} + {}^{6}{H_{9 / 2}} \to {}^{6}{H_{13 / 2}}$	2.4			24.6	5.1
${}^{6}{H_{11 / 2}} \to {}^{6}{H_{15 / 2}}$	1.7	11.6	35.4	17	60.5	33
${}^{6}{H_{11 / 2}} \to {}^{6}{H_{13 / 2}}$	4.4			11.1	39.5
${}^{6}{H_{13 / 2}} \to {}^{6}{H_{15 / 2}}$	3	22.4	34.5	29	100	65

Sample	Decay Time (ms) ${}^{6}{H_{13 / 2}}$	Decay Time (ms) ${}^{6}{H_{11 / 2}}$	Rise Time (ms) ${}^{6}{F_{11 / 2}} + {}^{6}{H_{9 / 2}}$
Dy:AgBr	24.1	12.5	1.84
$Dy : {AgBr}_{0.5} {Cl}_{0.5}$	22.4	11.6 (13 at $20 K$ )	1.8
Dy:AgCl	-	10.1	1.57

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