Near infrared radio-luminescence of O2 loaded radiation hardened silica optical fibers: A candidate dosimeter for harsh environments

Francesca, Diego Di; Girard, Sylvain; Agnello, S.; Marcandella, Claude; Paillet, Philippe; Boukenter, Aziz; Gelardi, F. M.; Ouerdane, Y.

doi:10.1063/1.4901340

Cited by 13 publications

(13 citation statements)

References 24 publications

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“…After the O 2 treatment, only a small narrow peak appears at~1550 cm À1 , which is due to the stretching vibration of interstitial O 2 molecules. [13][14][15] The subsequent X-ray irradiation is responsible for the appearance of a band at about 900 cm À1 . In the inset of Fig.…”

Section: Resultsmentioning

confidence: 99%

Resonance Raman of oxygen dangling bonds in amorphous silicon dioxide

Francesca

Boukenter

Agnello

et al. 2016

J. Raman Spectrosc.

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We investigate the origin of a resonance Raman band induced by ionizing radiation in amorphous silicon dioxide (silica glass), which can be detected under ultraviolet laser excitation. A silica sample, rich of oxygen‐excess related defects, was prepared by treating some length of a pure‐silica‐core multimode fiber in an O2 atmosphere (at high temperature and pressure) and by irradiating it with X‐rays at 10 MGy(SiO2) dose. A micro‐Raman study revealed a gaussian band peaking at 896 cm−1 with a full width at half maximum of 32 cm−1, which could be detected by exciting the sample with the 325‐nm line of a HeCd laser. This spectral feature is absent in the Raman spectra performed with the 442‐nm line of the same laser. On the basis of several experimental evidences and some complementary literature data, the 896 cm−1 band is assigned to a resonance Raman scattering of oxygen dangling bonds, often called non‐bridging oxygen hole centers. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 99%

Resonance Raman of oxygen dangling bonds in amorphous silicon dioxide

Francesca

Boukenter

Agnello

et al. 2016

J. Raman Spectrosc.

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“…In any case, these data demonstrate that X⟶a and X⟶b transitions of 1 O 2 can be directly studied with relatively high accuracy using O 2 -containing optical fibers. Such fibers are presently being developed for near-infrared applications in radiation environments 23 and for luminescent dosimetry applications 47 .…”

Section: O2 Absorption Cross Sections and 1 O2 Radiative Lifetime In mentioning

confidence: 99%

Dynamics of Singlet Oxygen Molecule Trapped in Silica Glass Studied by Luminescence Polarization Anisotropy and Density Functional Theory

et al. 2020

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The lowest excited electronic state of the O2 molecule, a 1 g, the "singlet oxygen", is of utmost importance for photochemistry and photobiology. For O2 trapped in silica glass, the lifetime of this state and the associated a 1 g ⟶ X 3 Σg − photoluminescence (PL) is the longest known for O2 in any condensed medium at room temperature. We studied the temperature dependence, decay kinetics and polarization anisotropy of this PL with 1064 nm excitation to the a 1 g (v=1) state, as well as with excitation to higher energies. PL at this excitation shows non-zero polarization anisotropy at 295 K, which increases with cooling to 14 K. At variance, excitation to higher energies yields depolarized PL. Polarization data indicate weak electric dipole character of the emission of the spin-and parityforbidden a 1 g ⟶ X 3 Σg − transition, enabled by O2-SiO2 cage interactions. Density functional theory calculations indicate that at low temperatures the rotation of O2 is partially or fully frozen even in large silica voids. As the temperature increases, PL is increasingly depolarized by libration movement of O2 molecules. Analysis of O2 optical absorption in optical fibers allows one to obtain the absorption cross sections of X⟶a and X⟶b transitions of O2 in SiO2 glass and to evaluate both radiative and non-radiative rates of a⟶X luminescence. * The 1st index (capital H or V) denotes the excitation polarization direction, the 2nd one (lower case h or v)-the PL emission polarization direction.

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“…The use of silica glass optical fibers in radiative environments is of major interest to the civil, military, or space fields, due to the numerous advantages of the fibers and in particular their electromagnetic immunity, wide bandwidth, light weight, and low volume . These optical fibers can be used as tools for transmitting information, as sensors, or as diagnostic elements.…”

Section: Introductionmentioning

confidence: 99%

“…However, radiation of sufficiently high‐energy incident on a waveguide or an optical fiber will break or ionize bonds in the glass structure and produce defect centers. These defects can absorb light propagating in the optical waveguide, resulting in an increase of the linear attenuation or so‐called radiation‐induced attenuation (RIA) …”

Section: Introductionmentioning

confidence: 99%

Radiation hardening of silica glass through fictive temperature reduction

Lancry

Babu

Ollier

et al. 2017

Int J of Appl Glass Sci

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The aim of this article was to report the effects of c-radiation on type-I Infrasil silica glass with different fictive temperatures, T f , for harsh environment applications. Radiation-induced attenuation in the visible range is found to be much lower in low fictive temperature samples. Photoluminescence experiments show that glasses with higher fictive temperatures have a higher nonbridging oxygen hole centers defect concentration generated by irradiation. In addition, electron paramagnetic resonance studies reveal higher E' point defects, AlOHC, and hydrogen(II) defects in high T f samples. In general, we find that the c-radiation "hardness" of Infrasil301 silica glass becomes significantly higher with decreasing fictive temperature. K E Y W O R D Sdefects, fiber materials, fictive temperature, radiation resistance, silica

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Near infrared radio-luminescence of O2 loaded radiation hardened silica optical fibers: A candidate dosimeter for harsh environments

Cited by 13 publications

References 24 publications

Resonance Raman of oxygen dangling bonds in amorphous silicon dioxide

Resonance Raman of oxygen dangling bonds in amorphous silicon dioxide

Dynamics of Singlet Oxygen Molecule Trapped in Silica Glass Studied by Luminescence Polarization Anisotropy and Density Functional Theory

Radiation hardening of silica glass through fictive temperature reduction

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