Radiation resistance characteristics of optical fibers

Kakuta, T.; Wakayama, N.; Sanada, Kazushi; Fukuda, O.; Inada, K.; Suematsu, T.; Yatsuhashi, M.

doi:10.1109/jlt.1986.1074849

Cited by 17 publications

(4 citation statements)

References 7 publications

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“…Effects of high doses of radiation on optical fibers have long been investigated to determine transmission capabilities of the fibers in reactor and particle accelerator environments [129], [130]. The property, called radiation hardness, opposes chemical changes such as photo-darkening, ensuring consistent performance of the optical fiber for data transmission.…”

Section: Industrial Radiation Processingmentioning

confidence: 99%

Recent Advances in Silica Glass Optical Fiber for Dosimetry Applications

et al. 2020

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In this paper, we review the highly promising silica glass, fabricated as doped and undoped optical fiber for intended use in radiation dosimetry. The dosimetry techniques reviewed here, underpinned by intrinsic and extrinsic defects in silica glass, focus on Thermoluminescence (TL), Optically Stimulated Luminescence (OSL) and Radioluminescence (RL), with occasional references to the much more established Radiation Induced Attenuation (RIA). The other focus in this review is on the various materials that have been reported earlier as dopants and modifiers used in silica glass optical fiber radiation dosimeters. This article also elaborates on recently reported optical fiber structures, namely, cylindrical fibers, photonic crystal fibers and flat fibers, as well as dimensions and shapes used for optimization of dosimeter performance. The various types of optical fiber radiation dosimeters are subsequently reviewed for various applications ranging from medical dosimetry such as in external beam radiotherapy, brachytherapy and diagnostic imaging, as well as in industrial processing and space dosimetry covering a dynamic dose range from μGy to kGy. Investigated dosimetric characteristics include reproducibility, fading, dose response, reciprocity between luminescence yield to dose-rate and energy dependence. The review is completed by a brief discussion on limitations and future developments in optical fiber radiation dosimetry.

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Section: Industrial Radiation Processingmentioning

confidence: 99%

Recent Advances in Silica Glass Optical Fiber for Dosimetry Applications

et al. 2020

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“…This contribution is especially necessary to take into account in a work of optical fiber systems by the influence impulse ionising radiation and by the low-temperature radiation [1,2]. Such fibres may be applied in the local area network of the space station operating at A = 850 mu [31.…”

Section: Introductionmentioning

confidence: 99%

“…Ia spectra of the PSC fibre (the core-silica glass KS4V) '-irradiated at a dose 10 Gy,T=300 K (I) and the photobleaching spectrum of IA by the iradiation of He-Ne laser(2).…”

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confidence: 99%

<title>Unstable radiation colour centres in pure silica fibres: the nature and properties</title>

et al. 1994

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Review results on the investigation of the nature and properties of certain radiation coloure centres (RCC) arising in '-irradiated pure silica core (PSC) fibres was presented in our work. These RCC with the absorption bands 670,800 nm and the low-temperature IR-absorption (LTIRA) are unstable at the room temperature and bring the large contribution in the induced absorption (IA) value of fibres at A = 850 nm

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“…The transmitting fibre is required to be compliant with the international standard ITU-T G.652.B which recommends a value of loss less than 0.4 dB/km at 1310 nm and 0.35 dB/km at 1550 nm. The radiation tolerance, of light at 1310 nm should not exceed 7 dB/km for a total ionizing dose of 10 MRad [7].…”

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confidence: 99%

Sensors for Harsh Environment: Radiation Resistant FBG Sensor System

Pal

Dhar

Ghosh

et al. 2017

J. Lightwave Technol.

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This is the accepted version of the paper.This version of the publication may differ from the final published version. Abstract-This paper presents radiation resistant characteristics of fibre Bragg grating (FBG) sensors written in a photosensitive fiber and connected to a silica core radiation resistant optical fibre, aiming to develop a sensor system suitable for both sensing and data transmission in harsh environment. The silica core fluorine-down-doped clad optical fibre has been specifically designed and fabricated for this study using the modified chemical vapor deposition technique. Key waveguide parameters, including the width of the fluorine doped inner cladding have been optimized to obtain a low loss (<0.2 dB/km) at the operating wavelength region of 1550 nm. The fibre fabrication process, mainly the deposition condition, has also been optimized to achieve smooth deposition and sintering of silica core layers, to minimize radiation induced absorption. As a result, radiation induced absorption of ∼2.2 dB/km at 1550 nm under accumulated dose of 25 MRad at dose rate of 0.39 MRad/hr has been successfully achieved. To create an effective sensor system for harsh environmental conditions, this specialty fibre is connected to a number of FBGs (sensors) fabricated in photosensitive fibres prior to their extensive evaluations by being exposed to different accumulated dose of gamma radiation. Their corresponding Bragg wavelength shifts (BWS) and peak amplitudes were continuously monitored. It was found that the radiation induced BWS can be greatly reduced by shielding the sensors using stainless steel tubing. The temperature sensitivity and peak amplitude were found to be largely unchanged before and after exposure to Gamma radiation of 25 MRad which shows their potential use for temperature measurements in radiation environments with an uncertainty of around 0.1°C. Permanent repository link

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Radiation resistance characteristics of optical fibers

Cited by 17 publications

References 7 publications

Recent Advances in Silica Glass Optical Fiber for Dosimetry Applications

Recent Advances in Silica Glass Optical Fiber for Dosimetry Applications

<title>Unstable radiation colour centres in pure silica fibres: the nature and properties</title>

Sensors for Harsh Environment: Radiation Resistant FBG Sensor System

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