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Proceedings Paper

Force and temperature characteristics of a fs-laser machined locally micro-structured FBG
Author(s): Franz J. Dutz; Gabriele Marchi; Valentin Stephan; Heinz P. Huber; Johannes Roths
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Paper Abstract

A locally micro-structured fiber Bragg grating (LMFBG) was manufactured by forming a circumferential groove in the middle of a type I fiber Bragg grating (FBG). The groove was directly ablated using a fs-laser and had a length of 86μm, a depth of 27μm and steep side walls. Due to the precisely machined geometry of the structure the reflection spectra can be accurately described with a fairly simple theoretical model. At several constant temperatures in the range from 5°C to 45°C this structure was exposed to various compressive loads in the range from 0N to -1.42N. Here the force and temperature sensitivity of the LMFBG are presented. This structure can be used for miniaturized compressive force sensing at variable temperatures, which is of particular interest for many bio-medical applications.

Paper Details

Date Published: 30 May 2016
PDF: 4 pages
Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 991621 (30 May 2016); doi: 10.1117/12.2236836
Show Author Affiliations
Franz J. Dutz, Munich Univ. of Applied Sciences (Germany)
Gabriele Marchi, Munich Univ. of Applied Sciences (Germany)
Valentin Stephan, Munich Univ. of Applied Sciences (Germany)
Heinz P. Huber, Munich Univ. of Applied Sciences (Germany)
Johannes Roths, Munich Univ. of Applied Sciences (Germany)

Published in SPIE Proceedings Vol. 9916:
Sixth European Workshop on Optical Fibre Sensors
Elfed Lewis, Editor(s)

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