Sensor and method for determining temperature along an optical fibre

摘要

An optical fiber temperature sensor comprising: an optical pulse generator; an optical fiber into which said optical pulses are fed; an optical receiver to receive said optical pulses reflected by said optical fiber and to convert them into an electrical signal; a processor which receives said electrical signal and determines the temperature along said optical fiber; said optical receiver comprising a first filter and a second filter to filter said optical pulse reflected by said optical fiber, characterized in that said first and said second filters filter two adjacent portions of anti-Stokes optical signals or of Stokes optical signals.