Radiation-induced absorption and luminescence in specially hardened large-core silica optical fibers

Томашук, А.Л.; Golant, K. M.; Dianov, E. M.; Medvedkov, O.I.; Plaksin, О.А.; Степанов, В. А.; Степанов, П. А.; Demenkov, P. V.; Чернов, В. М.; Klyamkin, S. N.

doi:10.1109/23.856500

Cited by 32 publications

(12 citation statements)

References 12 publications

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“…13,[34][35][36] Two feasible modifications of this radiation-hardening technique have been reported: H 2 -loading followed by preirradiation which leads to the suppression of the RICC precursors 34 and H 2 -loading of a fiber with a hermetic coating preventing H 2 outdiffusion. 13,[34][35][36] Two feasible modifications of this radiation-hardening technique have been reported: H 2 -loading followed by preirradiation which leads to the suppression of the RICC precursors 34 and H 2 -loading of a fiber with a hermetic coating preventing H 2 outdiffusion.…”

Section: Radiation Hardening Via H 2 -Loadingmentioning

confidence: 99%

Formation mechanisms of precursors of radiation-induced color centers during fabrication of silica optical fiber preform

Томашук

Забежайлов

2011

Journal of Applied Physics

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Articles you may be interested inComplete energy transfer due to rare-earth phase segregation in optical fiber preform glasses Samples in the form of transverse slices of rods and optical fiber preforms made from the highhydroxyl KU-1 and low-hydroxyl KS-4V silica by the plasma outside deposition (POD) method are c-irradiated to a dose of $1 MGy (SiO 2 ). Next, the radial dependences of the radiation-induced nonbridging oxygen hole center (NBOHC) and E 0 -center (three-coordinated silicon) in the samples are constructed by measuring the amplitudes of their 4.8 and 5.8 eV absorption bands, respectively. Based on the analysis of these radial dependences and considering the temperature and duration of the preirradiation heat treatment of the rods and preforms at the POD-installation, we determine the ratio of the oscillator strengths of the above bands and the microscopic thermoinduced processes occurring during preform fabrication and producing precursors of the radiation-induced NBOHC and E 0 -center. These processes are found to be associated with the escape of either H 2 or H 2 O from neighboring hydroxyl groups, and, therefore, can occur in high-hydroxyl silica only. It is concluded that enhancement of the radiation resistance of high-hydroxyl silica optical fibers requires decreasing the temperature and duration of the preform fabrication process, in particular, changing from the POD-technology to the low-temperature plasmachemical vapor deposition (PCVD) or surface PCVD (SPCVD)-technology.

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Section: Radiation Hardening Via H 2 -Loadingmentioning

confidence: 99%

Formation mechanisms of precursors of radiation-induced color centers during fabrication of silica optical fiber preform

Томашук

Забежайлов

2011

Journal of Applied Physics

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“…This detrimental effect has prompted researchers to look for methods that significantly reduce the RIA in the visible spectral region. A very effective method consists in soaking the fibre in molecular hydrogen [3]. After diffusion the hydrogen acts as a 'protective' agent against the formation of radiation-induced color centers.…”

Section: Introductionmentioning

confidence: 99%

Reduction of the radiation-induced absorption in hydrogenated pure silica core fibres irradiated in situ with γ-rays

Brichard

Томашук

Bogatyrjov

et al. 2007

Journal of Non-Crystalline Solids

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“…4(B) shows the EPR spectrum of preform sample after exposure of 8×10 3 J/cm 2 . Many authors showed that in the UV-visible range the response of pure silica core fibers under ionizing radiation is compromised by the presence of the pair Non Bridging Oxygen Hole Center (NBOHC) (≡Si-O • ) and E center (≡Si •• ) [8,22], originating from the rupture of the so called "strained bonds" (≡Si-O ) [18,20]. Furthermore in our preform samples after irradiation exposure only E centers are detected.…”

Section: F-doped Fibers and Preformsmentioning

confidence: 86%

“…Usually classical optical fibers for telecommunications are used in the IR, from 835 to 1600 nm, where the optical transmission is better. Moreover new technological fields, like medical application and plasma diagnostic, need the use of light guides in the visible and UV region were optical transmission is affected by many losses [2,[8][9][10]. All this well explains the necessity to investigate the exact nature of point defects, checking their origin and properties and so reducing degradation effects also in the UV-visible domain.…”

Section: Introductionmentioning

confidence: 99%

Optical and photonic material hardness for energetic environments

Origlio

Girard

Boscaino

et al. 2009

UVX 2008 - 9e Colloque Sur Les Sources Cohérentes Et Incohérentes UV, VUV Et X : Applications Et Développements Récents

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Abstract.We studied the effects of dielectric change in the chemical composition and in the realization procedures under radiation exposure. We have compared the radiation effects on Ge-doped and F-doped fibers and preforms: the first play a crucial role in the photosensitivity property, the second improves the dielectric radiation hardness even at low concentrations. The use of different spectroscopic techniques (RIA, OA, EPR) allow the identification of the point defect formation mechanisms at the origin of the optical degradation properties.

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Radiation-induced absorption and luminescence in specially hardened large-core silica optical fibers

Cited by 32 publications

References 12 publications

Formation mechanisms of precursors of radiation-induced color centers during fabrication of silica optical fiber preform

Formation mechanisms of precursors of radiation-induced color centers during fabrication of silica optical fiber preform

Reduction of the radiation-induced absorption in hydrogenated pure silica core fibres irradiated in situ with γ-rays

Optical and photonic material hardness for energetic environments

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