Behavior of fibre Bragg gratings under high total dose gamma radiation

Gusarov, A.; Berghmans, Francis; Fernández, Alberto; Deparis, Olivier; Defosse, Y.; Starodubov, D.; Décreton, M.; Megret, Patrice; Blondel, M.

doi:10.1109/radecs.1999.858625

Cited by 6 publications

(9 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7(b). A similar behaviour was observed in previous works 39,40 where, in addition to the radiation-induced Bragg wavelength shift, a reduction in the reflectivity was also reported. Here, according to the authors, the sections of the fiber core that received different UV-fluences during grating inscription possess different sensitivities to radiation 39 .…”

Section: (A)supporting

confidence: 90%

Analysis of uncoated LPGs written in B-Ge doped fiber under proton irradiation for sensing applications at CERN

Berruti

Vaiano

Quero

et al. 2020

Sci Rep

View full text Add to dashboard Cite

In this contribution, a complete dissertation concerning the behavior of a Long Period Grating (LPG) inscribed in a B-Ge co-doped optical fiber by means of an excimer laser and exposed to proton irradiation during a recent extensive campaign performed at the European Organization for Nuclear Research (CERN) with a fluence of 4.4·10 15 p·cm −2 is provided. The experimental results have been thus combined for the first time to the best of our knowledge with numerical simulations in order to estimate the variations of the major parameters affecting the grating response during the ultra-high dose proton exposure. From the correlation between experimental and numerical analysis, the irradiation exposure was found to induce a maximal variation of the core effective refractive index of ~1.61·10 −4 , responsible of a resonance wavelength red shift of ~44 nm in correspondence of the highest absorbed radiation dose of 1.16 MGy. At the same time, a relevant decrease close to ~0.93·10 −4 in the refractive index modulation pertaining to the grating was estimated, leading to a reduction of the resonant dip visibility of ~12 dB. The effect of the proton beam on the spectral response of the LPG device and on the optical fiber parameters was assessed during the relaxation phases, showing a partial recovery only of the wavelength shift without any relevant change in the dip visibility revealing thus a partial recovery only in the refractive index of the core while the reduction of the refractive index modulation observed during the irradiation remained unchanged.www.nature.com/scientificreports www.nature.com/scientificreports/ 5 %RH, i.e. where both miniaturized capacitive sensors and polyimide coated FBGs substantially lose accuracy. Nevertheless, to assess their possible application in the new generation of detectors foreseen within the HL-LHC project, a clear understanding of the physical and optical mechanisms involved during the LPGs radiation exposure is mandatory, together with a systematic study of their behavior under realistic radiation levels with respect to those expected at HL-HLC.Certainly, massive knowledge concerning the effects of irradiation on optical fibers and optical fiber-based devices has been collected over the years, but still not all the factors involved are completely clear and known. In 2018 Girard et al. published a very interesting review about the recent advancements on the radiation hardened fiber optic-based systems 13 , highlighting the potential and the future challenges of this innovative technology for the application in harsh environments. In ref. 13 the authors also provided an overview of the main radiation-induced effects on several classes of fiber optics and fiber optic-based technology, including both point sensors and distributed sensors. It is well-assessed that radiation alters the fiber properties by creating point defects in silica-based material due to ionization or displacement damage processes leading to structural modifications in the pure or doped amorphous host silica matrix...

show abstract

Section: (A)supporting

confidence: 90%

Analysis of uncoated LPGs written in B-Ge doped fiber under proton irradiation for sensing applications at CERN

Berruti

Vaiano

Quero

et al. 2020

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Fibre Bragg grating (FBG) sensors were, from this point of view, a very promising candidate. Therefore, we extensively evaluated FBG sensors in various nuclear environments, both gamma and mixed gamma-neutron fields [10][11][12][13][14][15]. Our results showed the radiation tolerance of commercial off-the-shelf FBG temperature sensors written in naturally photosensitive optical fibres during accelerated irradiation tests.…”

Section: Introductionmentioning

confidence: 96%

Long-term radiation effects on fibre Bragg grating temperature sensors in a low flux nuclear reactor

Fernández

Gusarov

Brichard

et al. 2004

Meas. Sci. Technol.

View full text Add to dashboard Cite

Fibre Bragg grating (FBG) temperature sensors have already shown short-term radiation tolerance in nuclear environments. However, the effect of long-term irradiation needed to be investigated. We therefore characterized multiplexed FBG temperature sensors inserted early 2000 in an irradiation channel of a low flux nuclear reactor. After 50 months, we show that the sensors still operate satisfactorily and that the measured drift is lower than 3 • C.

show abstract

“…Real-time monitoring for stable usage of nuclear power using the optical fiber sensing technology has drawn much attention in the nuclear industry due to the excellent durability of the optical fiber in the Seongmin JU et al: Effect of Temperature and Gamma-Ray Irradiation on Optical Characteristics of Fiber Bragg Grating Inscribed Radiation-Resistant Optical Fiber 17 irradiation environment [1][2][3][4][5][6][7][8][9]. Especially, the optical fiber based on the fiber Bragg grating (FBG) as a sensing probe has come into the spotlight in the control systems of the nuclear reactor and the nuclear power plant, mainly due to the advantages of electromagnetic interferences immunity, remote metering, multiplexing capabilities, and fast response [10][11][12][13][14][15]. However, the irradiation with gamma-ray (γ-ray) on the optical fiber with the FBG is known to bring about an increase in the transmission loss and thus the shift of the Bragg peak wavelength [11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…Especially, the optical fiber based on the fiber Bragg grating (FBG) as a sensing probe has come into the spotlight in the control systems of the nuclear reactor and the nuclear power plant, mainly due to the advantages of electromagnetic interferences immunity, remote metering, multiplexing capabilities, and fast response [10][11][12][13][14][15]. However, the irradiation with gamma-ray (γ-ray) on the optical fiber with the FBG is known to bring about an increase in the transmission loss and thus the shift of the Bragg peak wavelength [11][12][13][14][15][16][17][18][19][20]. An increase in the signal transmission loss under high energy irradiation is known due to the formation of radiation-induced defects and color centers [1][2][3][4][5][6][7][8][9][10][11][12][13][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…However, the irradiation with gamma-ray (γ-ray) on the optical fiber with the FBG is known to bring about an increase in the transmission loss and thus the shift of the Bragg peak wavelength [11][12][13][14][15][16][17][18][19][20]. An increase in the signal transmission loss under high energy irradiation is known due to the formation of radiation-induced defects and color centers [1][2][3][4][5][6][7][8][9][10][11][12][13][21][22][23]. Thus, the radiation resistance can be improved by reducing and blocking the formation of radiation-induced defects such as non-bridging oxygen hole centers (NBOHCs), E centers, and self-trapped holes (STHs) [5-8, 18, 19, 22-25].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Temperature and Gamma-Ray Irradiation on Optical Characteristics of Fiber Bragg Grating Inscribed Radiation-Resistant Optical Fiber

Kim

Linganna

et al. 2019

Photonic Sens

View full text Add to dashboard Cite

A new radiation-hard germano-silicate glass optical fiber with a pure silica glass buffer and a boron-doped silica glass inner cladding was fabricated for temperature sensor application based on the fiber Bragg grating (FBG) under -ray irradiation environment. The temperature dependences of optical attenuation at 1550.5 nm and Bragg reflection wavelength shift from 18 ℃ to 40 ℃ before the γ-ray irradiation were about 4.5710-4 dB/ ℃ and 5.48 pm/ ℃ , respectively. The radiation-induced optical attenuation at 1550.5 nm and the radiation-induced Bragg reflection wavelength shift under the γ-ray irradiation with the total dose of 22.85 kGy at 35 ℃ were about 0.03 dB/m and 0.12 nm, respectively, with the γ-ray irradiation sensitivity of 5.2510-3 pm/Gy. The temperature and the γ-ray irradiation dependence of optical attenuation at 1550.5 nm in the FBG written fiber with boron-doped silica glass inner cladding were about 6 times and 4 times lower than that in the FBG written fiber without boron-doped silica glass inner cladding under a temperature change from 18 ℃ to 40 ℃ and the γ-ray irradiation with the total dose of 22.85 kGy at 35 ℃, respectively. Furthermore, the effect of temperature increase on the Bragg reflection wavelength of the FBG written fiber with boron-doped silica inner cladding was much larger about 1000 times than that of the γ-ray irradiation. However, no influence on the reflection power of the Bragg wavelengths and the full width at half maximum (FWHM) bandwidth under temperature and the γ-ray irradiation change was found. Also, after the γ-ray irradiation with the dose of 22.85 kGy, no significant change in the refractive index was found but the residual stresses developed in the fiber were slightly relaxed or retained.

show abstract

Behavior of fibre Bragg gratings under high total dose gamma radiation

Cited by 6 publications

References 15 publications

Analysis of uncoated LPGs written in B-Ge doped fiber under proton irradiation for sensing applications at CERN

Analysis of uncoated LPGs written in B-Ge doped fiber under proton irradiation for sensing applications at CERN

Long-term radiation effects on fibre Bragg grating temperature sensors in a low flux nuclear reactor

Effect of Temperature and Gamma-Ray Irradiation on Optical Characteristics of Fiber Bragg Grating Inscribed Radiation-Resistant Optical Fiber

Contact Info

Product

Resources

About