scholarly journals Energy-transfer upconversion and excited-state absorption in KGdxLuyEr1-x-y(WO4)2 waveguide amplifiers

2019 ◽  
Vol 9 (12) ◽  
pp. 4782
Author(s):  
Sergio A. Vázquez-Córdova ◽  
Shanmugam Aravazhi ◽  
Alexander M. Heuer ◽  
Christian Kränkel ◽  
Yean-Sheng Yong ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Excited State Absorption ◽  
Waveguide Amplifiers ◽  
Energy Transfer Upconversion

scholarly journals Molecular light-upconversion: we have had a problem! When excited state absorption (ESA) overcomes energy transfer upconversion (ETU) in Cr(III)/Er(III) complexes

2021 ◽  
Author(s):  
Claude Piguet ◽  
Céline Besnard ◽  
Helene Bolvin ◽  
Alexandre Fürstenberg ◽  
Bahman Golesorkhi ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Excited State Absorption ◽  
Energy Transfer Upconversion

Nine-coordinate [ErN9] or [ErN3O6] chromophores found in triple helical [Er(L)3]3+ complexes (L corresponds to 2,2’,6’,2”-terpyridine (tpy), 2,6-(bisbenzimidazol-2-yl)pyridine (bzimpy), 2,6-diethylcarboxypyridine (dpa-ester) or 2,6-diethylcarboxamidopyridine (dpa-diamide) derivatives), [Er(dpa)3]3- (dpa is the 2,6-dipicolinate dianion)...

Excited-state absorption and energy transfer in Er3+ doped LiYF4

1986 ◽  
Vol 36 (1) ◽  
pp. 39-47 ◽  
Author(s):  
J. Rubin ◽  
A. Brenier ◽  
R. Moncorge ◽  
C. Pedrini
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Excited State Absorption

Excited state absorption and energy transfer losses in thulium doped fluoroindogallate glass

2006 ◽  
Vol 85 (1) ◽  
pp. 101-104 ◽  
Author(s):  
D. Fagundes-Peters ◽  
A.S.S. de Camargo ◽  
L.A.O. Nunes
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Excited State Absorption

scholarly journals Investigation of the up-conversion processes in Er3+:LiYF4 crystals 12

Exacta ◽  
2008 ◽  
Vol 4 (1) ◽  
pp. 129-134
Author(s):  
Fábio Henrique Jagosich ◽  
Luiz Vicente Gomes Tarelho ◽  
Laércio Gomes ◽  
Izilda Márcia Ranieri
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Optical Parametric Oscillator ◽  
Decay Curve ◽  
Second Harmonic ◽  
Pulsed Laser ◽  
Excited State Absorption ◽  
Radiation Process ◽  
Quadrupole Interactions ◽  
Optical Parametric

In this work, we investigated the up-conversion processes in LiYF4 (YLF) crystals doped with 1 mol% of Er3+ and containing 50 mol% of Er3+. The up-conversion processes include the excited state absorption (ESA) of pumping radiation process and the energy-transfer up-conversion (ETU) process. The luminescence lifetime was measured from decay curve of the 4S3/2 T 4I15/2 (556 nanometers [nm]) transition using pulsed laser excitations tuned between 967 and 999 nm from an optical parametric oscillator pumped by the second harmonic of a Q-switched Nd:YAG laser. We also studied the dipole-dipole and dipole-quadrupole interactions that occur among Er3+ ions in Er (50 mol%):YLF crystal. For this investigation, we used the Inokuti-Hirayama model that is due to an energy transfer between ions without involving the excitation migration through donors.

scholarly journals Spectroscopy and Near-Infrared to Visible Upconversion of Er3+ Ions in Aluminosilicate Glasses Manufactured with Controlled Optical Transmission

2021 ◽  
Vol 11 (3) ◽  
pp. 1137
Author(s):  
Daniel Sola ◽  
Adrián Miguel ◽  
Eduardo Arias-Egido ◽  
Jose I. Peña
Keyword(s):  
Energy Transfer ◽  
Spectral Range ◽  
Optical Transmission ◽  
Near Infrared ◽  
Upconversion Luminescence ◽  
Excited State Absorption ◽  
Visible Spectral Range ◽  
Excitation Spectra ◽  
Aluminosilicate Glasses ◽  
Energy Transfer Upconversion

In this work we report on the spectroscopic properties and the near-infrared to visible upconversion of Er3+ ions in aluminosilicate glasses manufactured by directionally solidification with the laser floating zone technique. Glasses were manufactured in a controlled oxidizing atmosphere to provide them with high optical transmission in the visible spectral range. Absorption and emission spectra, and lifetimes were assessed in both the visible and the near infrared spectral range. Green upconversion emissions of the 2H11/2→4I15/2 and 4S3/2→4I15/2 transitions at 525 nm and 550 nm attributed to a two-photon process were observed under excitation at 800 nm. Mechanisms responsible for the upconversion luminescence were discussed in terms of excited state absorption and energy transfer upconversion processes. Excitation spectra of the upconverted emission suggest that energy transfer upconversion processes are responsible for the green upconversion luminescence.

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