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Proceedings Paper

Acousto-optic control of the LPG spectrum for sensing applications
Author(s): Roberson A. Oliveira; Gustavo R. C. Possetti; Carlos A. F. Marques; Paulo T. Neves; Carlos A. Bavastri; Ricardo C. Kamikawachi; José L. Fabris; Marcia Muller; Rogério N. Nogueira; John Canning; Alexandre A. P. Pohl
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Paper Abstract

Experimental and numerical demonstration of the acousto-optic effect applied in long period grating by means of flexural waves is presented. The interaction between acoustic and optical waves is modeled with help of the method of assumed modes, which delivers the strain field inside the grating and the transfer matrix method, which, given the strain field as input, calculate the resultant grating spectrum. The experimental and theoretical results are found to be in good agreement. The main effect of the bends in the grating is the break of degeneracy of the circular cladding modes, leading the attenuation band to be changed. Among all the applications of this methodology, it is important to mention the possibility of use as a tunable filter, laser cavity gain controller, switching device and transducer in sensing systems.

Paper Details

Date Published: 18 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77538Y (18 May 2011); doi: 10.1117/12.885101
Show Author Affiliations
Roberson A. Oliveira, Federal Univ. of Technology (Brazil)
Gustavo R. C. Possetti, Federal Univ. of Technology (Brazil)
Carlos A. F. Marques, Instituto de Telecomunicações (Portugal)
Paulo T. Neves, Federal Univ. of Technology (Brazil)
Carlos A. Bavastri, Federal Univ. of Paraná (Brazil)
Ricardo C. Kamikawachi, Federal Univ. of Technology (Brazil)
José L. Fabris, Federal Univ. of Technology (Brazil)
Marcia Muller, Federal Univ. of Technology (Brazil)
Rogério N. Nogueira, Instituto de Telecomunicações (Portugal)
John Canning, The Univ. of Sydney (Australia)
Alexandre A. P. Pohl, Federal Univ. of Technology (Brazil)


Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors

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