Thermal lens study of the OH− influence on the fluorescence efficiency of Yb3+-doped phosphate glasses

Jacinto, Carlos; Oliveira, S. L.; Nunes, L.A.O.; Catunda, T.; Bell, M.J.V.

doi:10.1063/1.1861960

Cited by 41 publications

(33 citation statements)

References 14 publications

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“…As a consequence the multiphonon decay rate could be increased, leading to a reduction in the 4 F 3/2 fluorescence lifetime. In addition it is known that the presence of OH -groups in rare earth doped crystals and glasses could behave as energy acceptors in such a way that energy transfer processes are activated, thus leading to an additional increase in the non radiative decay rates [14]. One of these two mechanisms (or a combination of them) makes the luminescence to decay faster in the RPE waveguide, with a stronger lifetime reduction in the extraordinary waveguide, which corresponds to the highest proton concentration layer, while in the ordinary waveguide (TE modes) confined in the layer partially recovered during the Li→H second stage, the lifetime reduction is attenuated.…”

Section: Introductionmentioning

confidence: 99%

Time resolved confocal luminescence investigations on Reverse Proton Exchange Nd:LiNbO_3 channel waveguides

Jaque¹,

Cantelar²,

Cussó³

et al. 2007

Opt. Express

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Abstract:In this work we report on the time and spatial resolved fluorescence of Neodymium ions in LiNbO 3 channel waveguides fabricated by Reverse Proton Exchange. The analysis of the fluorescence decay curves obtained with a sub-micrometric resolution has evidenced the presence of a relevant fluorescence quenching inside the channel waveguide. From the comparison between diffusion simulations and the spatial dependence of the 4 F 3/2 fluorescence decay rate we have concluded that the observed fluorescence quenching can be unequivocally related to the presence of H + ions in the LiNbO 3 lattice. Nevertheless, it turns out that Reverse Proton Exchange guarantees a fluorescence quenching level significantly lower than in similar configurations based on Proton Exchange waveguides. This fluorescence quenching has been found to be accompanied by a relevant red-shift of the 4 F 3/2 → 4 I 9/2 fluorescence band.

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Section: Introductionmentioning

confidence: 99%

Time resolved confocal luminescence investigations on Reverse Proton Exchange Nd:LiNbO_3 channel waveguides

Jaque¹,

Cantelar²,

Cussó³

et al. 2007

Opt. Express

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“…The TL technique has been successfully used to the determination of thermo-optical parameters and fluorescence quantum efficiencies of solids. [16][17][18][19][20] The TL signal is proportional to heat released by the sample in the quasicontinuous wave regime and the TL response time is much longer than the fluorescence lifetime. Therefore, the TL experimental data does not rely on any kind of theoretical assumption about the fluorescence kinetics that are usually fitted by Eq.…”

Section: Ndmentioning

confidence: 99%

“…[16][17][18][19][20] It also provides relevant thermo-optical coefficients such as thermal diffusivity ͑D͒ and temperature coefficient of the optical path length change ͑ds / dT͒. In the TL experiment the samples are exposed to a modulated excitation laser beam with a Gaussian intensity profile.…”

Section: B Thermal Loadingmentioning

confidence: 99%

Upconversion in Nd3+-doped glasses: Microscopic theory and spectroscopic measurements

Oliveira

Sousa

Andrade

et al. 2008

Journal of Applied Physics

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Infrared emissivity of tin upon release of a 25 GPa shock into a lithium fluoride window J. Appl. Phys. 110, 103510 (2011) Microcavity effects in SiGe/Si heterogeneous nanostructures prepared by electrochemical anodization of SiGe/Si multiple quantum wells J. Appl. Phys. 110, 103101 (2011) Microstructure, optical property, and electronic band structure of cuprous oxide thin films J. Appl. Phys. 110, 103503 (2011) Suppression of luminescence quenching at the nanometer scale in Gd2O3 doped with Eu3+ or Tb3+: Systematic comparison between nanometric and macroscopic samples of life-time, quantum yield, radiative and nonradiative decay rates J. Appl. Phys. 110, 094317 (2011) Influence of local atomic configuration in AlGdN phosphor thin films on deep ultra-violet luminescence intensity J. Appl. Phys. 110, 093108 (2011) Additional information on J. Appl. Phys. In this work, we report a systematic investigation of upconversion losses and their effects on fluorescence quantum efficiency and fractional thermal loading in Nd 3+ -doped fluoride glasses. The energy transfer upconversion ͑␥ up ͒ parameter, which describes upconversion losses, was experimentally determined using different methods: thermal lens ͑TL͒ technique and steady state luminescence ͑SSL͒ measurements. Additionally, the upconversion parameter was also obtained from energy transfer models and excited state absorption measurements. The results reveal that the microscopic treatment provided by the energy transfer models is similar to the macroscopic ones achieved from the TL and SSL measurements because similar ␥ up parameters were obtained. Besides, the achieved results also point out the migration-assisted energy transfer according to diffusion-limited regime rather than hopping regime as responsible for the upconversion losses in Nd-doped glasses.

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“…Moreover, it can also induce surface deformation/displacement, depolarization losses, and material fractures. 5,11,12 In other words, it is often considered as the ultimate limitation for power scaling. 13 On the other hand, as demonstrated in recent studies performed in doped dielectric microchip lasers, the TL plays a vital role in stabilizing the plane-plane cold cavity and hence enabling high quality laser output.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10] Either as highly transparent optical windows or mostly as host for luminescent ions. Optical glasses have also been used for high power lasers.…”

Section: Introductionmentioning

confidence: 99%

Influence of temperature and excitation procedure on the athermal behavior of Nd3+-doped phosphate glass: Thermal lens, interferometric, and calorimetric measurements

Astrath

Barboza

Medina

et al. 2009

Journal of Applied Physics

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2009Influence of temperature and excitation procedure on the athermal behavior of Nd(3+)-doped phosphate glass: Thermal lens, interferometric, and calorimetric measurements JOURNAL OF APPLIED PHYSICS, v.106, n.7, 2009 http://producao.usp.br/handle/BDPI/16575 In this work, thermal and optical properties of the commercial Q-98 neodymium-doped phosphate glass have been measured at low temperature, from 50 to 300 K. The time-resolved thermal lens spectrometry together with the optical interferometry and the thermal relaxation calorimetry methods were used to investigate the glass athermal characteristics described by the temperature coefficient of the optical path length change, ds / dT. The thermal diffusivity was also determined, and the temperature coefficients of electronic polarizability, linear thermal expansion, and refractive index were calculated and used to explain ds / dT behavior. ds / dT measured via thermal lens method was found to be zero at 225 K. The results provided a complete characterization of the thermo-optical properties of the Q-98 glass, which may be useful for those using this material for diode-pumped solid-state lasers.

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Thermal lens study of the OH− influence on the fluorescence efficiency of Yb3+-doped phosphate glasses

Cited by 41 publications

References 14 publications

Time resolved confocal luminescence investigations on Reverse Proton Exchange Nd:LiNbO_3 channel waveguides

Time resolved confocal luminescence investigations on Reverse Proton Exchange Nd:LiNbO_3 channel waveguides

Upconversion in Nd3+-doped glasses: Microscopic theory and spectroscopic measurements

Influence of temperature and excitation procedure on the athermal behavior of Nd3+-doped phosphate glass: Thermal lens, interferometric, and calorimetric measurements

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