Effects of gamma radiation on perfluorinated polymer optical fibers

Stajanča, Pavol; Mihai, Laura; Sporea, Dan; Neguţ, Daniel; Sturm, Heinz; Schukar, Marcus; Krebber, Katerina

doi:10.1016/j.optmat.2016.05.027

Cited by 37 publications

(22 citation statements)

References 42 publications

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“…Polymer optical fibres (POF) are an alternative that have only recently been under consideration for these applications. The bulk of these results are for X-ray dosimetry [12,13], although other contributions have gone some distance towards defining radiation induced attenuation (RIA) [14,15] and bulk material degradation [16]. While the RIA of CYTOP fibres has been considered up to certain gamma radiation doses, it is important to understand and consider the practical impact of gamma radiation on the FBG itself.…”

Section: Introductionmentioning

confidence: 99%

“…To date, PMMA and CYTOP have both been considered in one form or another with respect to radiation environments [12,13,15]. In the context of distributed sensing for monitoring within structures such as nuclear waste repositories, CYTOP presents the advantage of longer operational distances than other polymer fibres and could even be considered at the present time as the only practical polymer fibre for distributed sensing in 1550 nm region [21], this band being of interest for the wide range of compatible equipment and the often lower prices for components such as optical circulators.…”

Section: Introductionmentioning

confidence: 99%

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CYTOP Fibre Bragg Grating Sensors for Harsh Radiation Environments

Broadway

Kinet

Theodosiou

et al. 2019

Sensors

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We present a polymer fibre Bragg grating sensor and its sensitivity to gamma radiation by observing the reflected spectral profile. The Bragg grating is femtosecond inscribed within a perfluorinated CYTOP fibre and the alteration of the Bragg wavelength corresponds to the total radiation dose received. Over a total dose of 41 k Gy, the fibre demonstrates a sensitivity of − 26.2 p m / k Gy and a resolution of 40 Gy. Under active consideration for the instrumentation of nuclear waste repositories, this study gives a better understanding of the effects of gamma radiation upon Bragg gratings in CYTOP fibres.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CYTOP Fibre Bragg Grating Sensors for Harsh Radiation Environments

Broadway

Kinet

Theodosiou

et al. 2019

Sensors

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“…A critical aspect is the assessment of their resistance under different radiation conditions, ranging from low radiation levels, typically present in medical applications, to high-energy applications. For these reasons, the research focused on the exposure of optical fibers and fiber sensors to gamma-ray 6 – 8 , charged particles 9 , 10 , synchrotron 11 and X-ray 12 radiation. The most part of the studies targeted Fiber Bragg Gratings (FBGs), fabricated in different optical fibers (photosensitive, H-loaded, or rad-hard) and investigated both in gamma and neutron-gamma mixed environment 2 , 4 , 13 – 15 .…”

Section: Introductionmentioning

confidence: 99%

Arc-induced Long Period Gratings in standard and speciality optical fibers under mixed neutron-gamma irradiation

Stăncălie

Esposito

Ranjan

et al. 2017

Sci Rep

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In this paper, for the first time, the effects of mixed neutron and gamma flux on the spectral and sensing responses of Long Period Gratings (LPGs) are thoroughly analyzed. Six LPGs written by means of Electric Arc Discharge (EAD) technique in standard and speciality fibers, including radiation-hardened ones, were tested. The EAD technique was chosen because it enables the writing of gratings both in standard and not photosensitive fibers. The experiments have been carried out in a “TRIGA” pulsed nuclear reactor and the LPGs were irradiated by a gamma-ray dose-rate of 9 Gy/s and a mean 1.2∙1012 n/(cm2s) neutron flux. Real time monitoring was performed for a comparative investigation of LPGs’ response, in terms of radiation sensitivity and wavelength shift. Experiments show that LPG in a radiation-resistant fiber exhibits resonant wavelength shift higher than LPG in standard fiber. The changes of temperature sensitivity due to radiation were experimentally established by comparison of pre- and post-radiation characterization, indicating that radiation effects induce a slight increase of the temperature sensitivity, except for the LPG in pure-silica fiber. Theoretical and numerical analysis was combined with experimental data for evaluation LPGs’ parameters changes, such as refractive index and thermo-optic coefficient, after exposure to radiation.

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“…Our recent study suggested that perfluorinated polymer optical fibers (PF-POFs) might have considerably higher radiation sensitivity than PMMA fibers [ 21 ]. PF-POFs are based on a perfluorinated optical polymer Cytop which offers low-loss transmission unmatched by any other polymer material.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, low-loss transmission window of PF-POFs covers much broader interval of VIS and NIR wavelengths [ 22 ], thus, opening the possibility of RIA monitoring in a wider spectral range. Nevertheless, PF-POF radiation sensitivity increases strongly towards shorter wavelengths [ 21 ], and we showed that RIA monitoring of PF-POFs in the VIS region could be promising for radiation sensing [ 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Radiation-Induced Attenuation of Perfluorinated Polymer Optical Fibers for Radiation Monitoring

Stajanča

Krebber

2017

Sensors

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Due to some of their unique properties, optical fiber dosimeters are attractive and extensively researched devices in several radiation-related areas. This work evaluates the performance and potential of commercial perfluorinated polymer optical fibers (PF-POFs) for radiation monitoring applications. Gamma radiation-induced attenuation (RIA) of two commercial PF-POFs is evaluated in the VIS spectral region. Influence of a dose rate and temperature on RIA measurement is investigated, along with defect stability and measurement repeatability. Co-extruded PF-POFs are identified as more suitable for radiation monitoring applications due to lower dose-rate dependence. With co-extruded PF-POF, RIA measurement holds potential for highly-sensitive radiation monitoring with good reproducibility. The results show that operation in the blue part of the spectrum provides most favorable performance in terms of the largest nominal radiation sensitivity, lower temperature, and dose-rate dependence as well as higher defect stability. We demonstrate for the first time to our knowledge, that PF-POFs can be used for distributed detection of radiation with doses down to tens of Grays. The off-the-shelf, user-friendly PF-POF could be of interest as a cheap, disposable sensor for various applications, especially of a more qualitative nature.

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Effects of gamma radiation on perfluorinated polymer optical fibers

Cited by 37 publications

References 42 publications

CYTOP Fibre Bragg Grating Sensors for Harsh Radiation Environments

CYTOP Fibre Bragg Grating Sensors for Harsh Radiation Environments

Arc-induced Long Period Gratings in standard and speciality optical fibers under mixed neutron-gamma irradiation

Radiation-Induced Attenuation of Perfluorinated Polymer Optical Fibers for Radiation Monitoring

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