New absorption bands in pure and F-doped silica optical fibres

Heitmann, W.; Bonewitz, H.; Muhlich, A.

doi:10.1049/el:19830420

Cited by 12 publications

(10 citation statements)

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“…Tables Table 1. Absorption Cross Sections of X⟶ a and X⟶ b Transitions of O2 in Silica Glass Optical Fibers, Obtained from Analysis of Published Data 18,24,25,46 .…”

Section: Resultsmentioning

confidence: 99%

“… c Peak absorption cross sections σ X – a and σ X – b were obtained by using absorption band amplitudes from experiment A and the calculated O 2 concentrations. σ X – a was additionally corrected for insufficient spectral resolution in A.…”

Section: Discussionmentioning

confidence: 99%

“…In optical fibers, produced in oxygen-rich conditions, two sharp optical absorption lines have been observed 46 : one at 1273 nm and the other at 765 nm (see Supplement, figure S1). Their amplitudes and full widths at half maximum (FWHM) are listed in Table 1 (denoted as "Experiment A").…”

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

confidence: 99%

“…They are reasonably similar. The accuracy of the cross sections for g-SiO2 calculated in this paper (Tables 1, 2) is limited by the accuracy, with which numerical values can be extracted from the published absorption and Raman spectra of the optical fibers 18,46 . Repeating these experiments with dedicated O2loaded optical fibers would provide a way of accurate direct measurement of O2 X⟶a and X⟶b absorption cross sections in g-SiO2.…”

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

confidence: 99%

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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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“…Tables Table 1. Absorption Cross Sections of X⟶ a and X⟶ b Transitions of O2 in Silica Glass Optical Fibers, Obtained from Analysis of Published Data 18,24,25,46 .…”

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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

confidence: 99%

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

confidence: 99%

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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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“…However, the transition probabilities are enhanced by interactions between interstitial O 2 and surrounding Si-O network, which partially relax the parity selection rule. Indeed, the a-X and b-X absorption bands of interstitial O 2 are detectable in O 2 -rich optical fibers with a large optical path length [10], and the evaluated absorption cross sections are two orders of magnitude larger than those of O 2 in air [11].…”

Section: Observation By Optical Spectroscopymentioning

confidence: 99%

Diffusion and reactions of interstitial oxygen species in amorphous SiO2: A review

Kajihara

Miura²,

Kamioka

et al. 2008

Journal of Non-Crystalline Solids

121

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Raman spectra and oxygen‐related absorption bands in pure silica core fibres

Carvalho

Dumas

Corset

et al. 1985

J Raman Spectroscopy

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The Raman spectra of pure silica core fibres revealed the presence of molecular oxygen, which may be responsible for two absorption bands, one at 0.76 and the other at 1.27 Fm.There has been a renewal of interest in pure silica core fibres owing to their inherently low losses and dispersion between 1.2 and 1.6 pm. In this region, the main cause of attenuation is the presence of the OH absorption bands. A recent study of the loss spectrum of pure and fluorine-doped silica fibres of low OH content by Heitmann et aL' revealed the existence of a new absorption band at 1.273 pm, which always appears associated with another one located around 0.765 pm. They tentatively assigned these bands to the presence of crystallites in the silica matrix which could not be detected by x-ray analysis. We present here new evidence, from a Raman analysis of fibres, that suggests a different origin for these absorption bands.

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New absorption bands in pure and F-doped silica optical fibres

Cited by 12 publications

References 0 publications

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

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

Diffusion and reactions of interstitial oxygen species in amorphous SiO2: A review

Raman spectra and oxygen‐related absorption bands in pure silica core fibres

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