Preliminary study of distributed optical fiber sensing technology in radiation monitoring

A decline of optical performance and corresponding loss originated when the optical fiber has been exposed in the radiation environment due to radiation-induced defects and the formation of color centers. According that, a conception of radiation monitoring system, based on distributed optical fiber single-end sensing technique,was introduced. It can be used to retrieve the dose of radiation by comparing light intensity of the output with the input. And space division multiplexing technology and many fiber-optic sensors are adopted to make multipoint supervision of nuclear power plants and nuclear arsenals and so on, where radioactive materials are concentrated, over large area. (authors)