Photodarkening of Infrared Irradiated Yb3+-Doped  Alumino-Silicate Glasses: Effect on UV Absorption Bands and Fluorescence Spectra

Gebavi, Hrvoje; Milanese, Daniel; Taccheo, S.; Méchin, David; Monteville, Achille; Freyria, Francesca Stefania; Bonelli, Barbara; Robin, Thierry

doi:10.3390/fib1030101

Cited by 6 publications

(5 citation statements)

References 23 publications

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“…Thus, it should be ascribed to a Ce/Cu co-doping effect and its impact on the structure of the host glass matrix. The presence of a similar absorption band was observed in silica glasses co-doped with Yb/Al [22]. Normalized PL spectra of the Cu/Ce-co-doped cane under different laser excitations are presented in Figure 3.…”

Section: Materials 2019 12 X For Peer Review 3 Of 11supporting

confidence: 67%

“…Thus, it should be ascribed to a Ce/Cu co-doping effect and its impact on the structure of the host glass matrix. The presence of a similar absorption band was observed in silica glasses co-doped with Yb/Al [22]. RL spectra were collected by exchanging the PMT detector for a UV/VIS mini-spectrometer (C10082CA Hamamatsu, Hamamatsu, Japan) in Figure 1.…”

Section: Materials 2019 12 X For Peer Review 3 Of 11mentioning

confidence: 69%

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Cu/Ce-co-Doped Silica Glass as Radioluminescent Material for Ionizing Radiation Dosimetry

et al. 2020

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Optically activated glasses are essential to the development of new radiation detection systems. In this study, a bulk glassy rod co-doped with Cu and Ce ions, was prepared via the sol-gel technique and was drawn at about 2000 °C into a cylindrical capillary rod to evaluate its optical and radioluminescence properties. The sample showed optical absorption and photoluminescence (PL) bands attributed to Cu+ and Ce3+ ions. The presence of these two ions inside the host silica glass matrix was also confirmed using PL kinetics measurements. The X-ray dose rate was remotely monitored via the radioluminescence (RL) signal emitted by the Cu/Ce scintillating sensor. In order to transport the optical signal from the irradiation zone to the detection located in the instrumentation zone, an optical transport fiber was spliced to the sample under test. This RL signal exhibited a linear behavior regarding the dose rate in the range at least between 1.1 mGy(SiO2)/s and 34 Gy(SiO2)/s. In addition, a spectroscopic analysis of this RL signal at different dose rates revealed that the same energy levels attributed to Cu+ and Ce3+ ions are involved in both the RL mechanism and the PL phenomenon. Moreover, integrated intensities of the RL sub-bands related to both Cu+ and Ce3+ ions depend linearly on the dose rate at least in the investigated range from 102 mGy(SiO2)/s up to 4725 mGy(SiO2)/s. The presence of Ce3+ ions also reduces the formation of HC1 color centers after X-ray irradiation.

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Section: Materials 2019 12 X For Peer Review 3 Of 11supporting

confidence: 67%

“…Thus, it should be ascribed to a Ce/Cu co-doping effect and its impact on the structure of the host glass matrix. The presence of a similar absorption band was observed in silica glasses co-doped with Yb/Al [22]. RL spectra were collected by exchanging the PMT detector for a UV/VIS mini-spectrometer (C10082CA Hamamatsu, Hamamatsu, Japan) in Figure 1.…”

Section: Materials 2019 12 X For Peer Review 3 Of 11mentioning

confidence: 69%

Cu/Ce-co-Doped Silica Glass as Radioluminescent Material for Ionizing Radiation Dosimetry

et al. 2020

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“…Yb 3+ charge transfer (CT) -related absorption bands are a potential source for absorption bands [51,52], but, here, they cannot be resolved from the absorption spectra in Figure 2. Any such band would be expected to occur in the deep UV for all glasses [53][54][55]. Furthermore, any changes to the CT process itself would be a result of changes in the Yb 3+ local environment, such as the defects of interest.…”

Section: Radiation Type Particle Energy (Mev) Doses (Gy) Penetration ...mentioning

confidence: 99%

Response of Various Yb3+-Doped Oxide Glasses to Different Radiation Treatments

et al. 2022

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The radiation effects of electrons and protons on the spectroscopic and optical properties of oxide glasses doped with Yb3+ in various glass systems were investigated to understand the impact of the glass composition on the glass photo-response. Changes in the optical and emission properties were seen after the radiation treatment, and the magnitude of the changes depended on the irradiation source and dose. For all the investigated materials, the absorption coefficients in the 200–550 nm range increase post-irradiation, revealing the formation of defects in the glasses during the irradiation. While the spectroscopic properties of the tellurite glass remain unchanged, a small reduction in the Yb3+ emission intensity was seen after irradiating the phosphate, borosilicate, and germanate glasses, indicating that a reduction of Yb3+ to Yb2+ might occur in these glasses during the radiation treatment. The changes in the optical and spectroscopic properties after proton irradiation are small as they are localized at the surface of the glasses due to the shallow penetration depth of the proton in the glass. Even though the doses are small, the electron irradiation produces larger changes in the optical and spectroscopic properties since the electrons penetrate the entire volume of the glasses. All the changes in the optical and spectroscopic properties of the glasses were successfully reversed after a short heat treatment revealing the reversible nature of the photo-response of the investigated glasses.

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“…Common problems which reduce efficiency for both laser performance [4][5][6] and laser cooling [7] is the conversion of Yb ions from a trivalent to a divalent state. Ions such as Sm 3+ and Eu 3+ also demonstrate the same tendency.…”

Section: Introductionmentioning

confidence: 99%

The Impact of BiF3 Doping on the Yb3+ to Yb2+ Reduction during the LiYF4:Yb3+ Crystal-Growth Process

et al. 2022

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Here, we report on the opportunity to suppress Yb3+ to Yb2+ dopant-ion reduction in LiYbxY1−xF4 mixed crystals during growth processes, using the Bridgmen–Stocbarger technique in graphite crucibles in vacuum. This was carried out by the additional doping of the LiF-YF3-YbF3 powder mixture with 1% of BiF3 additive. The crystals of LiY0.8Yb0.2F4 and LiY0.8Yb0.2F4 with BiF3 doping in the charge, were grown. The spatial distribution of the spectral-kinetic properties of Yb3+ and Yb2+ ions along the grown crystalline-boules were studied. It was established that the Yb2+ concentration rises during the LiY0.8Yb0.2F4 crystal-growth processes without the BiF3 additive: the absorption coefficient of Yb2+ (π-polarization) at 340 nm rises from 0 (at the beginning of the boule) to 2.5 cm−1 (at the end of the boule). In contrast, the undetectable absorption of Yb2+ along the crystals grown from the BiF3 doped melt was displayed. The luminescence-decay time of Yb3+ decreases from 3.7 to 1.8 ms from the beginning to the end of the LiY0.8Yb0.2F4 boule grown from the BiF3 undoped melt, and stays constant (~3.7 ms) along the samples grown with BiF3. Here we demonstrate a positive effect of BiF3 doping on the optical homogeneity of LiYF4:Yb3+ crystals.

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Photodarkening of Infrared Irradiated Yb3+-Doped Alumino-Silicate Glasses: Effect on UV Absorption Bands and Fluorescence Spectra

Cited by 6 publications

References 23 publications

Cu/Ce-co-Doped Silica Glass as Radioluminescent Material for Ionizing Radiation Dosimetry

Cu/Ce-co-Doped Silica Glass as Radioluminescent Material for Ionizing Radiation Dosimetry

Response of Various Yb3+-Doped Oxide Glasses to Different Radiation Treatments

The Impact of BiF3 Doping on the Yb3+ to Yb2+ Reduction during the LiYF4:Yb3+ Crystal-Growth Process

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