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Proceedings Paper

Design and fabrication of fiber Bragg grating arrays
Author(s): Riccardo Falciai; R. Fontana
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Paper Abstract

In this work, the photolithographic method with the improvement of the stretch-and-write technique is applied for the design and the fabrication of fiber-Bragg gratings distributed on different lengths of fiber and with different operating wavelengths. A proper apparatus was set-up, which allows to easily change the fiber position behind the mask; moreover, by suitable setting the stage displacements, it is possible to stretch the fiber to a given strain value. In this condition all written gratings compress and the peaks move towards shorter wavelengths. To the purpose to obtain grating arrays, working at pre-established wavelengths, strain calibration curves was obtained. Two different types of applications were investigated. Arrays of up to five gratings with different peak position and distributed over a 1 m length of fiber were fabricated and characterized for sensing purpose. Adjacent gratings spectrally concatenated were also produced in order to obtain pass-band filters to be applied in photonic systems. An interesting field of application of FBG arrays was considered for strain sensing in the automotive industry, to monitor various critical components of vehicles. Another example of application was the construction of a pass-band filter applied to suppress the first side lobes of a laser diode spectrum.

Paper Details

Date Published: 27 August 1999
PDF: 5 pages
Proc. SPIE 3737, Design and Engineering of Optical Systems II, (27 August 1999); doi: 10.1117/12.360021
Show Author Affiliations
Riccardo Falciai, IROE-CNR (Italy)
R. Fontana, IROE-CNR (Italy)

Published in SPIE Proceedings Vol. 3737:
Design and Engineering of Optical Systems II
Fritz Merkle, Editor(s)

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