Russian scientists have created the most durable fiber
Source:As the press service of the nust MISIS, the scientists of this institution have managed to create new production technology of high-precision sensors based on doped optical fiber. Such devices are extremely durable and can be used even in extreme conditions.
Information about a scientific finding published in the journal Laser Physics Letters. A new type of material is a fiber doped rare earth and transition metals. This composition provides the unique properties of the obtained fibers. According to the rector of nust MISIS Alevtina Chernikova
"an international team of scientists under the leadership of a visiting Professor in the Department of semiconductor electronics and semiconductor physics MISIS Alexander Kiryanov in collaboration with the Center for optical research (Leon, Mexico) and Research Institute for ceramics and glass (Calcutta, India) has developed a technology to create highly accurate standalone sensors based on optical fiber. The high sensitivity of the resulting fibers to changes of temperature, pressure, chemical composition and background radiation in the environment, their resistance to aggressive environments and high resistance to electromagnetic disturbances allows to carry out with their help of high-precision monitoring of large-scale facilities (pipelines, wells, nuclear power plants, bridges). Set the fiber length to measure objects of large (up to hundreds of meters) size. In earth orbit sensors based on these fibres can measure the status of background radiation in the spacecraft, the defects of its surface."
The Sensors on the basis of such a fiber is able to effectively record radiation of different types in a wide range of doses, extremely high temperature (1700°C), changes in the chemical composition and fluctuations of electromagnetic fields. Due to the unique characteristics of the devices based on it will be in demand in construction and geotechnical engineering, aerospace, oil & gas, high-current energy, including nuclear energy.
The sensor Itself is either a relatively small-sized device (which may be part of a multi-component detection networks), or «spatially distributed contour» able to gather information about various parameters at large distances.
Changes in the transmittance of the quartz core of optical fiber, doped with cerium and gold. Before irradiation by a beam of high energy electrons (left) and after (center). Right — process «recovery» under the action of light with a wavelength of 543 nm
As explained by the head of the project Alexander Kiryanov
«Research in this project aimed at creating a comprehensive research and application of fiber sensors of the second type using a specially developed doped fibers, the method nanoengineering. Such fibers can be a reliable solution when working in corrosive environments, when a device based on them is in extreme conditions – for example, when thermomonitoring oil wells or dosimetry at nuclear power plants».
Based on materials of RIA "news"
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