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Tunable Sensitivity in Long Period Fiber Gratings During Mode Transition With Low Refractive Index Intermediate Layer

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Tunable Sensitivity in Long Period Fiber Gratings During Mode Transition With Low Refractive Index Intermediate Layer

dc.contributor.author	del Villar, I.
dc.contributor.author	Montoya Cardona, Jorge
dc.contributor.author	Imas González, José Javier
dc.contributor.author	Reyes-Vera, Erick E.
dc.contributor.author	Ruiz Zamarreño, Carlos
dc.contributor.author	Matias, Ignacio R.
dc.contributor.author	Cruz Muñoz, José Luis
dc.date.accessioned	2023-10-25T13:01:07Z
dc.date.available	2023-10-25T13:01:07Z
dc.date.issued	2023
dc.identifier.uri	https://hdl.handle.net/10550/90619
dc.description.abstract	Double-clad fibers where the second cladding has a lower refractive index than the first cladding, prove to be ideal structures for potentiating and tuning the sensitivity in long-period fiber gratings (LPFGs) operating in mode transition. When a thin film is deposited on the optical fiber, the second cladding performs acts as a barrier that initially prevents the transition to guidance in the thin film of one of the modes guided in the first cladding. Finally, the transition to guidance occurs with a sensitivity increase, in analogy to the tunnel effect observed in semiconductors. This improvement has been demonstrated both as a function of the thin film thickness and the surrounding medium refractive index, with enhancement factors of 4 and 2, respectively. This idea reinforces the performance of LPFGs, adding a new degree of freedom to the mode transition and the dispersion turning point phenom- ena. Moreover, the control of the variation of the effective index of cladding modes could be applied in other structures, such as tilted-fiber gratings or evanescent wave sensors.
dc.language.iso	eng
dc.relation.ispartof	Journal of Lightwave Technology, 2023, vol. 41, num. 13, p. 4219-4229
dc.source	del Villar, I. Montoya Cardona, Jorge Imas González, José Javier Reyes-Vera, Erick E. Ruiz Zamarreño, Carlos Matias, Ignacio R. Cruz Muñoz, José Luis 2023 Tunable Sensitivity in Long Period Fiber Gratings During Mode Transition With Low Refractive Index Intermediate Layer Journal of Lightwave Technology 41 13 4219 4229
dc.subject	Ciència dels materials
dc.title	Tunable Sensitivity in Long Period Fiber Gratings During Mode Transition With Low Refractive Index Intermediate Layer
dc.type	journal article
dc.date.updated	2023-10-25T13:01:07Z
dc.identifier.doi	10.1109/JLT.2022.3226800
dc.identifier.idgrec	161458
dc.rights.accessRights	open access