Influence of the Fiber Coating Type on the Strain Response of Proton-Irradiated Fiber Bragg Gratings

Currás, E.; Virto, A. Lopez; Moya, D.; Vila, I.; Carrión, J. G.; Frövel, Malte; Garcı́a-López, J.; Clavijo, Miguel; Morilla, Yolanda; Palomo, F.R.

doi:10.1109/tns.2012.2206049

Cited by 12 publications

(6 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Coherently with reported literature for both FBGs 10,14,23,[27][28][29] and LPGs [14][15][16][17][18][19][20][21][22][23] under irradiation, as soon as the proton beam was started, a shift of the LPG resonance dip towards longer wavelengths was observed, as shown in Fig. 2(a).…”

Section: (A)supporting

confidence: 86%

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: 86%

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

“…The same conclusions can be drawn from the study under proton irradiation by Curras et al [ 103 ]. The authors explain the difference in the measured RI-BWSs with a two-stage process.…”

Section: Radiation Effects On Fbgssupporting

confidence: 83%

“…The first two are common in space, whereas neutrons are found in nuclear reactor cores or fusion-devoted facilities. Test facilities offering these types of beams are less accessible and only a few studies have been published about the FBG response under protons [ 39 , 101 , 102 , 103 , 104 , 105 ], electrons [ 104 ], or neutrons [ 19 , 22 , 23 , 24 , 27 , 28 , 106 ].…”

Section: Radiation Effects On Fbgsmentioning

confidence: 99%

Radiation Effects on Fiber Bragg Gratings: Vulnerability and Hardening Studies

Morana

Marin

Lablonde

et al. 2022

Sensors

View full text Add to dashboard Cite

Fiber Bragg gratings (FBGs) are point optical fiber sensors that allow the monitoring of a diversity of environmental parameters, e.g., temperature or strain. Several research groups have studied radiation effects on the grating response, as they are implemented in harsh environments: high energy physics, space, and nuclear facilities. We report here the advances made to date in studies regarding the vulnerability and hardening of this sensor under radiation. First, we introduce its principle of operation. Second, the different grating inscription techniques are briefly illustrated as well as the differences among the various types. Then, we focus on the radiation effects induced on different FBGs. Radiation induces a shift in their Bragg wavelengths, which is a property serving to measure environmental parameters. This radiation-induced Bragg wavelength shift (RI-BWS) leads to a measurement error, whose amplitude and kinetics depend on many parameters: inscription conditions, fiber type, pre- or post-treatments, and irradiation conditions (nature, dose, dose rate, and temperature). Indeed, the radiation hardness of an FBG is not directly related to that of the fiber where it has been photo-inscribed by a laser. We review the influence of all these parameters and discuss how it is possible to manufacture FBGs with limited RI-BWS, opening the way to their implementation in radiation-rich environments.

show abstract

“…As monitoring technology in-fibre Bragg grating sensors (FBG) will be used [250]; FBG sensors have become a very attractive solution for strain and temperature monitoring in hostile or hazardous environments. In particular, their small weight, size and intrinsic immunity to EMI combined with the absence of electrical signals and cables have recently encouraged the use of FBG sensors in high energy physics experiments [251,252]. Moreover, FBG sensors can be embedded in composite materials, allowing the fabrication of the so-called smart structures where the actual sensors are just part of the CFRP laminate, allowing for a straight forward integration into the supporting structure with a negligible interference from the point of view of the material budget.…”

Section: Integration and System Aspectsmentioning

confidence: 99%