Multi FBG femtosecond laser inscription in FPI based pressure sensors for temperature distribution

Sven Poeggel, Dinesh Babu Duraibabu, Amédée Lacraz, Kyriacos Kalli, Daniele Tosi, Gabriel Leen, Elfed Lewis

2015

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DOI 10.1117/12.2190008
Data confidence 85 high
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Abstract

We present in this paper an optical fiber pressure and temperature sensor (OFPTS) with multi Fibre Bragg Grating (FBG) array. The sensor based on an extrinsic Fabry Perot interferometer and is fabricated from silica glass. A femtosecond laser (FSL) was used to inscribe multiple FBGs proximately close to the diaphragm, parallel to each other. This concepts allows a chain of FBGs with miniature active length which can be a significant important tool for medical application, like radio frequency ablation (RFA) cancer treatment.