Radiation Vulnerability of Fiber Bragg Gratings in Harsh Environments

Morana, Adriana; Girard, Sylvain; Marin, Emmanuel; Marcandella, Claude; Rizzolo, Serena; Perisse, J.; Macé, Jean-Reynald; Taouri, A.; Boukenter, Aziz; Cannas, Marco; Ouerdane, Y.

doi:10.1109/jlt.2014.2364526

Cited by 24 publications

(9 citation statements)

References 21 publications

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“…In these experiments, only small changes in grating strength and resonant wavelength were observed after a 100 kGy dose of γ-radiation. In other experiments, higher doses up to 1 MGy resulted in a −60 pm shift of the Bragg wavelength [ 89 ]. It was also demonstrated fs-IR FBGs that are inscribed into PSC radiation hardened fiber can still function as temperature sensors even after exposure to neutron radiation fluences of 2.83 × 10 19 n fast /cm 2 [ 90 ].…”

Section: Applications Of Fs-laser Induced Fbgs For Sensingmentioning

confidence: 95%

Extreme Environment Sensing Using Femtosecond Laser-Inscribed Fiber Bragg Gratings

Mihailov

Grobnic

Hnatovsky

et al. 2017

Sensors

114

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The femtosecond laser-induced fiber Bragg grating is an effective sensor technology that can be deployed in harsh environments. Depending on the optical fiber chosen and the inscription parameters that are used, devices suitable for high temperature, pressure, ionizing radiation and strain sensor applications are possible. Such devices are appropriate for aerospace or energy production applications where there is a need for components, instrumentation and controls that can function in harsh environments. This paper will present a review of some of the more recent developments in this field.

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Section: Applications Of Fs-laser Induced Fbgs For Sensingmentioning

confidence: 95%

Extreme Environment Sensing Using Femtosecond Laser-Inscribed Fiber Bragg Gratings

Mihailov

Grobnic

Hnatovsky

et al. 2017

Sensors

114

View full text Add to dashboard Cite

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“…Similar studies but at lower dose are also mandatory for space applications (satellite or launcher instrumentation). Irradiation of optical fibers and fiber Bragg grating transducers have strong influence on any measurement due to radiation induced attenuation (RIA), radiation induced emission (RIE) and radiation induced compaction (RIC) [ 25 , 26 , 27 , 28 ]. RIA leads mainly to a reduction of the signal-to-noise ratio for a given interrogation signal while RIA and RIC (compaction of the silica glass matrix in case of irradiation reaching high fast neutron fluence) are both responsible for drifts of the Bragg wavelengths, and thus to increasing measurement errors.…”

Section: Key Aspects Of Fiber Bragg Grating Sensing Technology Formentioning

confidence: 99%

Temperature Resistant Fiber Bragg Gratings for On-Line and Structural Health Monitoring of the Next-Generation of Nuclear Reactors

Laffont

Cotillard

Roussel

et al. 2018

Sensors

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The harsh environment associated with the next generation of nuclear reactors is a great challenge facing all new sensing technologies to be deployed for on-line monitoring purposes and for the implantation of SHM methods. Sensors able to resist sustained periods at very high temperatures continuously as is the case within sodium-cooled fast reactors require specific developments and evaluations. Among the diversity of optical fiber sensing technologies, temperature resistant fiber Bragg gratings are increasingly being considered for the instrumentation of future nuclear power plants, especially for components exposed to high temperature and high radiation levels. Research programs are supporting the developments of optical fiber sensors under mixed high temperature and radiative environments leading to significant increase in term of maturity. This paper details the development of temperature-resistant wavelength-multiplexed fiber Bragg gratings for temperature and strain measurements and their characterization for on-line monitoring into the liquid sodium used as a coolant for the next generation of fast reactors.

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“…These two fibers include pure-silica random air-line (Corning's RAL) fibers and pure silica core, F-doped cladding single-mode fibers (Corning's Vascade) [13]. According to Morana et al [14], F-doped single mode fibers exhibited the lowest radiation-induced attenuation (RIA) at 1550 nm operation, in a study where fs-FBGs inscribed on F-doped, pure-silica core, and Ge-doped fibers were exposed to an accumulated gamma dose of 1 MGy. However, upon exposure to radiation, F-doped fibers had shown a slightly larger Bragg wavelength shift (BWS) towards the blue (−0.03pm/kGy for F-doped) compared to pure silica core fibers (−0.02pm/kGy for pure silica core).…”

Section: Fiber Selection Fbg Fabrication and Experimental Setupmentioning

confidence: 99%

Radiation resistant fiber Bragg grating in random air-line fibers for sensing applications in nuclear reactor cores

Zaghloul¹,

Wang²,

Huang³

et al. 2018

Opt. Express

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This paper reports the testing results of radiation resistant fiber Bragg grating (FBG) in random air-line (RAL) fibers in comparison with FBGs in other radiation-hardened fibers. FBGs in RAL fibers were fabricated by 80 fs ultrafast laser pulse using a phase mask approach. The fiber Bragg gratings tests were carried out in the core region of a 6 MW MIT research reactor (MITR) at a steady temperature above 600°C and an average fast neutron (>1 MeV) flux >1.2 × 10 n/cm/s. Fifty five-day tests of FBG sensors showed less than 5 dB reduction in FBG peak strength after over 1 × 10 n/cm of accumulated fast neutron dose. The radiation-induced compaction of FBG sensors produced less than 5.5 nm FBG wavelength shift toward shorter wavelength. To test temporal responses of FBG sensors, a number of reactor anomaly events were artificially created to abruptly change reactor power, temperature, and neutron flux over short periods of time. The thermal sensitivity and temporal responses of FBGs were determined at different accumulated doses of neutron flux. Results presented in this paper reveal that temperature-stable Type-II FBGs fabricated in radiation-hardened fibers can survive harsh in-pile conditions. Despite large parameter drift induced by strong nuclear radiation, further engineering and innovation on both optical fibers and fiber devices could lead to useful fiber sensors for various in-pile measurements to improve safety and efficiency of existing and next generation nuclear reactors.

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Radiation Vulnerability of Fiber Bragg Gratings in Harsh Environments

Cited by 24 publications

References 21 publications

Extreme Environment Sensing Using Femtosecond Laser-Inscribed Fiber Bragg Gratings

Extreme Environment Sensing Using Femtosecond Laser-Inscribed Fiber Bragg Gratings

Temperature Resistant Fiber Bragg Gratings for On-Line and Structural Health Monitoring of the Next-Generation of Nuclear Reactors

Radiation resistant fiber Bragg grating in random air-line fibers for sensing applications in nuclear reactor cores

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