The basic spectroscopic parameters of Ho3+-doped fluoroindate glass for emission at 3.9 μm

Laercio Gomes, Vincent Fortin, Martin Bernier, Réal Vallée, Samuel Poulain, Marcel Poulain, Stuart D. Jackson

Research output: Contribution to journalArticleResearchpeer-review

Abstract

This report details the first study of the fundamental spectroscopic properties of a new optical material for prospective application as a gain medium for fiber laser emission at 3.9 μm. We have investigated the decay processes that are relevant to the excited states of the 5I5 → 5I6 transition in singly Ho3+-doped InF3 (fluoroindate) glass using time-resolved fluorescence spectroscopy. The HoF3 concentration in the glass was 10 mol.%. We excited the 5I7 and 5I6 energy levels using selective excitation at 1982 nm and 1150 nm, respectively. We have established that a strong energy-transfer upconversion process by way of the well-known dipole-dipole interaction between two holmium ions excited to the 5I6 level populate the 5I5 (upper laser) level of the 3.9 μm transition. The 5I6 and 5I5 energy levels emit luminescence with measured peaks located at 2.85 μm and 3.92 μm, respectively and the luminescence efficiencies of these emissions are 78% and 0.2%, respectively. Results from numerical simulations show that for this high Ho3+ concentration, a population inversion for the 3.9 μm transition is reached only for a short time (t < 100 μs) after direct upper laser level pumping at a wavelength of 889 nm.

LanguageEnglish
Pages618-626
Number of pages9
JournalOptical Materials
Volume60
DOIs
Publication statusPublished - 1 Oct 2016

Fingerprint

Electron transitions
Electron energy levels
Luminescence
Holmium
Pumping (laser)
Glass
Optical materials
Lasers
glass
Fluorescence spectroscopy
Fiber lasers
energy levels
Excited states
Energy transfer
luminescence
dipoles
holmium
population inversion
optical materials
Ions

Keywords

  • Fibre lasers
  • Fluoride glass
  • Mid-infrared
  • Spectroscopy of laser materials

Cite this

Gomes, Laercio ; Fortin, Vincent ; Bernier, Martin ; Vallée, Réal ; Poulain, Samuel ; Poulain, Marcel ; Jackson, Stuart D. / The basic spectroscopic parameters of Ho3+-doped fluoroindate glass for emission at 3.9 μm. In: Optical Materials. 2016 ; Vol. 60. pp. 618-626.
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abstract = "This report details the first study of the fundamental spectroscopic properties of a new optical material for prospective application as a gain medium for fiber laser emission at 3.9 μm. We have investigated the decay processes that are relevant to the excited states of the 5I5 → 5I6 transition in singly Ho3+-doped InF3 (fluoroindate) glass using time-resolved fluorescence spectroscopy. The HoF3 concentration in the glass was 10 mol.{\%}. We excited the 5I7 and 5I6 energy levels using selective excitation at 1982 nm and 1150 nm, respectively. We have established that a strong energy-transfer upconversion process by way of the well-known dipole-dipole interaction between two holmium ions excited to the 5I6 level populate the 5I5 (upper laser) level of the 3.9 μm transition. The 5I6 and 5I5 energy levels emit luminescence with measured peaks located at 2.85 μm and 3.92 μm, respectively and the luminescence efficiencies of these emissions are 78{\%} and 0.2{\%}, respectively. Results from numerical simulations show that for this high Ho3+ concentration, a population inversion for the 3.9 μm transition is reached only for a short time (t < 100 μs) after direct upper laser level pumping at a wavelength of 889 nm.",
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The basic spectroscopic parameters of Ho3+-doped fluoroindate glass for emission at 3.9 μm. / Gomes, Laercio; Fortin, Vincent; Bernier, Martin; Vallée, Réal; Poulain, Samuel; Poulain, Marcel; Jackson, Stuart D.

In: Optical Materials, Vol. 60, 01.10.2016, p. 618-626.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - The basic spectroscopic parameters of Ho3+-doped fluoroindate glass for emission at 3.9 μm

AU - Gomes, Laercio

AU - Fortin, Vincent

AU - Bernier, Martin

AU - Vallée, Réal

AU - Poulain, Samuel

AU - Poulain, Marcel

AU - Jackson, Stuart D.

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AB - This report details the first study of the fundamental spectroscopic properties of a new optical material for prospective application as a gain medium for fiber laser emission at 3.9 μm. We have investigated the decay processes that are relevant to the excited states of the 5I5 → 5I6 transition in singly Ho3+-doped InF3 (fluoroindate) glass using time-resolved fluorescence spectroscopy. The HoF3 concentration in the glass was 10 mol.%. We excited the 5I7 and 5I6 energy levels using selective excitation at 1982 nm and 1150 nm, respectively. We have established that a strong energy-transfer upconversion process by way of the well-known dipole-dipole interaction between two holmium ions excited to the 5I6 level populate the 5I5 (upper laser) level of the 3.9 μm transition. The 5I6 and 5I5 energy levels emit luminescence with measured peaks located at 2.85 μm and 3.92 μm, respectively and the luminescence efficiencies of these emissions are 78% and 0.2%, respectively. Results from numerical simulations show that for this high Ho3+ concentration, a population inversion for the 3.9 μm transition is reached only for a short time (t < 100 μs) after direct upper laser level pumping at a wavelength of 889 nm.

KW - Fibre lasers

KW - Fluoride glass

KW - Mid-infrared

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