Alexey Faustov

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We have investigated radiation induced absorption in Al-doped, P-doped and Ge-doped optical fibres under <sup>60</sup>Co source gamma-radiation up to a total dose of 71 kGy at two temperatures 30 and 80 <sup>&#x00B0;</sup>C. The Al-doped and P-doped fibres demonstrated high radiation sensitivity required for the optical fibre dosimetry. The RIA response to(More)
The Belgian Agency for Radioactive Waste and Enriched Fissile Materials (ONDRAF/NIRAS) is developing a conceptual design for a supercontainer made of concrete and carbon steel for the post-conditioning of high-level nuclear waste prior to disposal in a geological repository site. This supercontainer should be instrumented to follow the temperature and(More)
We present the preliminary results obtained with bare fiber Bragg grating-based sensors embedded into half-scale Belgian supercontainer concept. Being temperature and strain sensitive, some sensors were placed into aluminum tubes to monitor only temperature and results were compared with thermocouples data. The utility of using bare fiber Bragg gratings,(More)
We have studied Co<sup>60</sup> ionizing radiation effect on the characteristics of Type IA fiber Bragg gratings. A record Bragg peak shift of 190 pm was observed for a grating written in Fibercore PS-1250/1500 photosensitive fiber at a radiation dose of 116 kGy. Type IA and Type I gratings show different kinetics under radiation and during post-radiation(More)
We have studied <formula formulatype="inline"><tex Notation="TeX">${\rm Co}^{60}$</tex></formula> gamma-irradiation effect on the characteristics of Type IA fiber Bragg gratings. A record Bragg peak shift of 190 pm was observed for a grating written in Fibercore PS-1250/1500 photosensitive fiber at a radiation dose of 116 kGy. Type IA and Type I gratings(More)
In this paper has been considered the new operator method which makes the calculation of a composite optical fiber bandwidth possible with taking into account an inhomogeneity’s type and scale. As an example of usage of the method the broadening compensation effect has been considered in details and was shown the possibility of the bandwidth increase in(More)
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