@article{10902/13431,
year = {2017},
month = {11},
url = {http://hdl.handle.net/10902/13431},
abstract = {In this paper, an In-fiber Mach-Zehnder interferometer inscribed by femtosecond laser for curvature sensing has been designed and manufactured. Its operating principle consists of a secondary waveguide inscription working as a sensing arm. This waveguide has been manufactured using asymmetric structures with an average refractive index change of 1.1 × 10-2 in its guiding section measured by refracted near-field profilometry. The overall arm/cladding index difference is higher than its core/cladding counterpart, which is a suggested condition for device operation following preliminary simulations. The manufactured Mach-Zehnder interferometer exhibits a linear response to bending radius that is also dependent on an established bending axis. Sensitivity has been measured up to 9.49 nm/m-1 for curvature ranges from 0 to 14 m-1. Simulation results using the beam propagation method and conformal mapping transformation to convert bending action into a tilt refractive index agree with experimental results for the same index parameters. Preliminary temperature test shows a remarkable cross sensitivity of 0.0024(3)m-1/-C up to 180 -C.},
organization = {This work has been supported by the pro-jects TEC2013-47264-C2-1-R, TEC2016-76021-C2-2-R (AEI/FEDER, UE) financed with FEDER funds, and grant BES-2014-069736 of the Spanish government and by the Parliament of Cantabria postdoc grant.},
publisher = {IEEE-},
publisher = {The Optical Society (OSA)},
publisher = {Journal of Lightwave Technology, 2017, 35(21), 4624-4628},
title = {Curvature sensor based on In-fiber Mach-Zehnder interferometer inscribed with femtosecond laser},
author = {Pallarés Aldeiturriaga, David and Rodríguez Cobo, Luis and Quintela Incera, Antonio and López Higuera, José Miguel},
}