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Guyot, Y.; Manaa, H.; Rivoire, Julien; Moncorgé, R.; Garnier, Nicolas; Descroix, E.; Bon, M.; Laporte, P.

doi:10.1103/physrevb.51.784

Cited by 181 publications

(55 citation statements)

References 38 publications

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“…A good agreement was obtained between calculated and experimental curves with the same upconversion parameter previously found in Ref. 5. The same group also studied the effect of upconversion on heat generation and thermal lensing in Nd:yttrium lithium fluoride and Nd:yttrium-aluminum garnet lasers.…”

Section: Ndsupporting

confidence: 49%

“…In this sense, several papers have investigated losses in Nd 3+ -doped materials as function of pump intensity in order to elucidate the upconversion mechanisms occurring in laser and amplifiers. [2][3][4][5][6][7][8][9][10][11][12][13] Guyot and coworkers obtained the excited state absorption ͑ESA͒ spectra of Nd 3+ in the single crystals Y 3 Al 5 O 12 , LiYF 4 , and LaMgAl 11 O 19 . 5 They observed that the discrepancies between the net gain cross section and the stimulated emission cross section could not be explained only by ESA losses.…”

Section: Ndmentioning

confidence: 99%

“…[2][3][4][5][6][7][8][9][10][11][12][13] Guyot and coworkers obtained the excited state absorption ͑ESA͒ spectra of Nd 3+ in the single crystals Y 3 Al 5 O 12 , LiYF 4 , and LaMgAl 11 O 19 . 5 They observed that the discrepancies between the net gain cross section and the stimulated emission cross section could not be explained only by ESA losses. For a better description of the Nd 3+ amplifier it was necessary to include the energy transfer upconversion ͑ Pollnau et al 3 performed steady state luminescence ͑SSL͒ measurements in order to investigate the behavior of 4 F 3/2 fluorescence intensity with the pump power for Nd:LiYF 4 .…”

Section: Ndmentioning

confidence: 99%

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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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Section: Ndsupporting

confidence: 49%

Section: Ndmentioning

confidence: 99%

Section: Ndmentioning

confidence: 99%

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

Oliveira

Sousa

Andrade

et al. 2008

Journal of Applied Physics

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“…Uma cascata dos dois amplificadores é utilizada para se obter o espectro diferencial de transmissão o qual resulta em medidas de AEE, absorção de estado fundamental (AEF) e também emissão estimulada (EE). No caso pulsado, 6,[19][20][21] o qual não será abordado aqui, é possível estudar simultâneamente as transições AEE a partir de estados com diferentes valores de tempo de vida. No entanto, este método oferece menor sensibilidade e pior razão sinal ruído do que o método contínuo, o qual pode ser eficientemente aplicado para medidas de AEE a partir de níveis com valores de tempo de vida longo, como os que são aqui discutidos.…”

Section: Introductionunclassified

Técnica de bombeio e prova para medidas de absorção de estado excitado e de emissão estimulada, em materiais sólidos dopados com íons terras raras

Camargo

Nunes

2008

Quím. Nova

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In these ions, the occurrence of Excited State Absorptions (ESA), from long lived electronic levels, is commonplace. Since ESA can deeply affect the efficiencies of the rare earth emissions, evaluation of these transitions cross sections is of greatest importance in predicting the potential applications of a given material. In this paper a detailed description of the pump-probe technique for ESA measurements is presented, with a review of several examples of applications in Nd 3+ , Tm 3+ and Er 3+ doped materials.

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“…Energy-transfer upconversion (ETU), often assisted by energy migration (both described in Chapter 2), has a significant impact on the amplifier or laser performance of a number of rare-earth-ion-doped compounds by depleting the population of the longlived upper state of the corresponding luminescence transition, thereby diminishing the available optical gain [69][70][71][72][73][74][75][76][77][78]. ETU can also be exploited to deplete the lower laser level [79][80][81][82] or generate upconversion luminescence and lasing [83][84][85][86][87].…”

Section: Chapter 4 Energy-transfer Upconversionmentioning

confidence: 99%

Spectroscopic excitation and quenching processes in rare-earth-ion-doped AI203 and their impact on amplifier and laser performance

Agazzi¹

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Excited-state-absorption and upconversion studies ofNd3+-doped single crystalsY3

Cited by 181 publications

References 38 publications

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

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

Técnica de bombeio e prova para medidas de absorção de estado excitado e de emissão estimulada, em materiais sólidos dopados com íons terras raras

Spectroscopic excitation and quenching processes in rare-earth-ion-doped AI203 and their impact on amplifier and laser performance

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