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Proceedings Paper

Acoustic waves in tilted fiber Bragg gratings for sensing applications
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Paper Abstract

Tilted fiber Bragg gratings (TFBGs) are one of the most attractive kind of optical fiber sensor technology due to their intrinsic properties. On the other hand, the acousto-optic effect is an important, fast and accurate mechanism that can be used to change and control several properties of fiber gratings in silica and polymer optical fiber. Several all-optical devices for optical communications and sensing have been successfully designed and constructed using this effect. In this work, we present the recent results regarding the production of optical sensors, through the acousto-optic effect in TFBGs. The cladding and core modes amplitude of a TFBG can be controlled by means of the power levels from acoustic wave source. Also, the cladding modes of a TFBG can be coupled back to the core mode by launching acoustic waves. Induced bands are created on the left side of the original Bragg wavelength due to phase matching to be satisfied. The refractive index (RI) is analyzed in detail when acoustic waves are turned on using saccharose solutions with different RI from 1.33 to 1.43.

Paper Details

Date Published: 16 May 2017
PDF: 5 pages
Proc. SPIE 10231, Optical Sensors 2017, 1023116 (16 May 2017); doi: 10.1117/12.2264230
Show Author Affiliations
Carlos A. F. Marques, Univ. de Aveiro (Portugal)
Nélia J. Alberto, Univ. de Aveiro (Portugal)
Fátima Domingues, Univ. de Aveiro (Portugal)
Cátia Leitão, Univ. de Aveiro (Portugal)
Paulo Antunes, Univ. de Aveiro (Portugal)
João L. Pinto, Univ. de Aveiro (Portugal)
Paulo André, Technical Univ. of Lisbon (Portugal)

Published in SPIE Proceedings Vol. 10231:
Optical Sensors 2017
Francesco Baldini; Jiri Homola; Robert A. Lieberman, Editor(s)

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