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Measurement accuracy and spatial resolution of a distributed temperature sensor based on a two-pulse differential coherent reflectometerстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 25 ноября 2020 г.
- Авторы: Lukashova T.O., Nanii O.E., Nikitin S.P., Treshchikov V.N.
- Журнал: Quantum Electronics
- Том: 50
- Номер: 9
- Год издания: 2020
- Издательство: Turpion - Moscow Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 882
- Последняя страница: 887
- DOI: 10.1070/qel17225
- Аннотация: We present a model and numerical simulation of a distributed temperature sensor based on a two-pulse differential coherent optical time-domain reflectometer (COTDR). The differential phase measured using a phase-sensitive Rayleigh reflectometer is shown to have a regular component, which is a linear function of temperature, and a random component, which is related to a random distribution of scattering centres in the fibre and restricts the accuracy of measurements of variations in temperature. Measurement accuracy can be improved by reducing the relative contribution of the random component via a decrease in pulse duration and/or an increase in the time delay between pulses. The spatial resolution of a differential two-pulse phase-sensitive reflectometer is shown to be determined by the time delay between pulses and to vary little with pulse duration. At a typical pulse duration (200 ns) and delay time (300 ns), the accuracy in measurements of variations in temperature in the 0.1-K range is 2 % and the spatial resolution is about 30 m.
- Добавил в систему: Наний Олег Евгеньевич