Mechanically induced long period fiber gratings in Er3+ fiber for structural health monitoring
Por:
Pulido-Navarro M.G., Alvarez-Chavez J.A., Ceballos-Herrera D.E., Escamilla-Ambrosio P.J.
Publicada:
1 ene 2013
Resumen:
This work presents preliminary results on wavelength sensitivity due to mechanically induced long period fiber grating (LPFG) on both standard single-mode and Er-doped fibers. The work presents and compares results for both types of fibers under different torsion conditions. In order to apply the torsion one of the fiber ends is fixed while torsion is applied on the other end. A LPFG whose period is 503µm is used to press on the fiber after the torsion, this will allow for micro curvatures to be formed on the fiber, which will in turn generate a periodical index perturbation on it. Here, it was noted that the rejection band shifts to shorter wavelengths for Er-doped fibers. It was detected that for torsion of 6 turns applied to 10cm doped fiber the wavelength peaks can shift up to 25nm, which is longer than similar results reported on standard fibers. Therefore, by using Er-doped fibers this technique will give more sensitive and accurate results on the real conditions of the structure under study. These results can be employed for sensing applications, especially for small to medium size structures, being these structures mechanical, civil or aeronautical. Theoretical calculations and simulations are employed for experimental results validation. © 2013 Copyright SPIE.
Filiaciones:
Pulido-Navarro M.G.:
Centro de Investigación e Innovación Tecnológica (CIITEC) IPN, Cerrada de Cecati S/N, col. Santa Catarina Azcapotzalco, C.P. 02250, México D.F., Mexico
Alvarez-Chavez J.A.:
Centro de Investigación e Innovación Tecnológica (CIITEC) IPN, Cerrada de Cecati S/N, col. Santa Catarina Azcapotzalco, C.P. 02250, México D.F., Mexico
Ceballos-Herrera D.E.:
Universidad Autónoma de Nuevo León (UANL), Facultad de Ciencias Físico-Matemáticas (FCFM), Cd. Universitaria, Av. Universidad s/n, San Nicolás de los Garza, 66451, Nuevo León, Mexico
Escamilla-Ambrosio P.J.:
Instituto Politécnico Nacional IPN, Centro de Investigación en Computación (CIC), México City, Mexico
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