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18 May 2011 Acousto-optic control of the LPG spectrum for sensing applications
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Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77538Y (2011)
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada
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.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Roberson A. Oliveira, Gustavo R. C. Possetti, Carlos A. F. Marques, Paulo T. Neves Jr., Carlos A. Bavastri, Ricardo C. Kamikawachi, José L. Fabris, Marcia Muller, Rogério N. Nogueira, John Canning, and Alexandre A. P. Pohl "Acousto-optic control of the LPG spectrum for sensing applications", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77538Y (18 May 2011);

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