Del Villar, IgnacioAchaerandio Alvira, MiguelArregui San Martín, Francisco JavierMatías Maestro, Ignacio2018-04-052018-04-052006I. Del Villar, M. Achaerandio, F. J. Arregui and I. R. Matias, "Generation of selective fringes with cascaded long-period gratings," in IEEE Photonics Technology Letters, vol. 18, no. 13, pp. 1412-1414, July 2006. doi: 10.1109/LPT.2006.8775671041-1135 (Print)1941-0174 (Electronic)10.1109/LPT.2006.877567https://academica-e.unavarra.es/handle/2454/28213The inscription of cascaded long-period gratings of different periods in optical fiber permits us to obtain both narrowband and wideband filters in the same spectrum. If used as an optical transducer, it may permit us to detect with the same device- wide and small parameter changes. The transmission spectra have been simulated using a theoretical model based on LP mode coupling and have been also experimentally demonstrated.application/pdfeng© 2006 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Coupled-mode analysisLong-period gratingsMach–Zehnder interferometerOptical fiber sensorsinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess