Politecnico Di Milano

Riccardo Belli

Mario Martinelli

Pierpaolo Boffi

Stefano Avanzi

A filter for an optical fibre temperature sensor comprising at least one first and one second optical filter for filtering an optical pulse reflected by said optical fibre, characterised in that said at least one first and one second optical filter comprise standard commercial filters complying with ITU specifications, said optical pulse lying within the range from 1570 nm to 1580 nm.

Filter for an optical fibre temperature sensor

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.

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Vedano al Lambro, Italy

Riccardo Belli