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Listar por palabra clave "Fiber optics sensors"

Mostrando ítems 1-11 de 11

Bragg Gratings Inscribed in Solid-Core Microstructured Single-Mode Polymer Optical Fiber Drawn From a 3D-Printed Polycarbonate Preform

Zubel, Michal G.; Fasano, Andrea; Woyessa, Getinet Taffesse; Min, Rui; Leal-Junior, Arnaldo Gomes; Theodosiou, Antreas; Marques, Carlos A. F.; Rasmussen, Henrik K.; Bang, Ole; Ortega Tamarit, Beatriz; Kalli, Kyriacos; Frizera-Neto, Anselmo; Pontes, Maria Jose; Sugden, Kate (Institute of Electrical and Electronics Engineers, 2020-11-01)

[EN] This paper reports the first microstructured solid-core fiber drawn from a 3D-printed preform and the first fiber Bragg gratings inscribed in a fiber of this type. The presented fiber is made of polycarbonate and ...
Characterization of a FBG sensor interrogation system based on a mode-locked laser scheme

Madrigal-Madrigal, Javier; Fraile-Pelaez, Francisco Javier; Zheng, Di; Barrera Vilar, David; Sales Maicas, Salvador (The Optical Society, 2017-10-02)

[EN] This paper is focused on the characterization of a fiber Bragg grating (FBG) sensor interrogation system based on a fiber ring laser with a semiconductor optical amplifier as the gain medium, and an in-loop electro-optical ...
Curvature investigation in tapered fibers and its application to sensing and mode conversion

Mas Gómez, Sara María; Martí Sendra, Javier; Palací López, Jesús (Elsevier, 2015-11)

Non-adiabatic tapered fibers are basic photonic components used in a wide range of applications. Here we investigate a way to increase their utility through the controllable bending of one of their tapered sections. The ...
Enhancement of the sensitivity of a temperature sensor based on fiber Bragg gratings via weak value amplification

Salazar-Serrano, L.J.; Barrera Vilar, David; Amaya Ocampo, Waldimar Alexander; Sales Maicas, Salvador; Pruneri, V..; Capmany Francoy, José; Torres, J.P. (Optical Society of America, 2015-09-01)

We present a proof-of-concept experiment aimed at increasing the sensitivity of Fiber-Bragg-gratings temperature sensors by making use of a weak-value-amplification scheme. The technique requires only linear optics elements ...
Fast and stable gratings inscription in POFs made of different materials with pulsed 248 nm KrF laser

Marques, Carlos; Min, Rui; Leal-Junior, A.; Antunes, Paulo; Fasano, A.; Woyessa, G.; Nielsen, Kristian; Rasmussen, H.K.; Ortega Tamarit, Beatriz; Bang, Ole (The Optical Society, 2018-01-22)

[EN] This paper presents fiber Bragg grating (FBG) inscription with a pulsed 248 nm UV KrF laser in polymer optical fibers (POFs) made of different polymers, namely polymethyl methacrylate (PMMA), cyclic-olefin polymer and ...
Liquid-air based Fabry-Pérot cavity on fiber tip sensor

Llera, Miguel; Aellen, Thierry; Hervás-Peralta, Javier; Salvade, Yves; Senn, Pascal; Le Floch, Sébastien; Keppner, Herbert (Optical Society of America, 2016-03-18)

[EN] This paper presents a Fabry-Perot fiber tip sensor based on an air-liquid filled cavity. The cavity is sealed off by a thin gold coated membrane of parylene C, between 300 and 350 nm, creating a particularly flexible ...
Multicore fiber-Bragg-grating-based directional curvature sensor interrogated by a broadband source with a sinusoidal spectrum

Zheng, Di; Madrigal-Madrigal, Javier; Chen, Hailan; Barrera Vilar, David; Sales Maicas, Salvador (The Optical Society, 2017)

[EN] A simple, spectral-drift-insensitive interrogation scheme for a multicore fiber Bragg grating (FBG)-based directional curvature sensor is proposed. The basic principle is to transform the wavelength shift of FBGs into ...
Spot events detection along a large scale sensor based on ultra weak FBGs using time-frequency analysis

Ricchiuti, Amelia Lavinia; Sales Maicas, Salvador (Optical Society of America, 2016-02-10)

[EN] A simple scheme for interrogating a 5 m-long photonics device and its potential applications to quasi-distributed fiber sensing is proposed. The sensor consists of an array of 500 identical very weak fiber Bragg ...
Temperature gradient sensor based on a long-fiber Bragg grating and time-frequency analysis

Ricchiuti, Amelia Lavinia; Barrera Vilar, David; Nonaka, Koji; Sales Maicas, Salvador (Optical Society of America, 2014-10-01)

A photonic sensor based on a 10-cm-long fiber Bragg grating (FBG) is presented and experimentally validated that is dedicated to detect the presence and the position of a temperature gradient. The system is based on the ...
Tilted fiber Bragg gratings in multicore optical fibers for optical sensing

Barrera Vilar, David; Madrigal-Madrigal, Javier; Sales Maicas, Salvador (The Optical Society, 2017)

[EN] We have inscribed a tilted fiber Bragg grating (TFBG) in selected cores of a multicore optical fiber. The presence of the TFBG permits to couple light from the incident guided mode to the cladding modes and to the ...
Time and frequency pump-probe multiplexing to enhance the signal response of Brillouin optical time-domain analyzers

Soto, Marcelo A.; Ricchiuti, Amelia Lavinia; Zhang, Liang; Barrera Vilar, David; Sales Maicas, Salvador; Thevenaz, Luc (Optical Society of America: Open Access Journals, 2014-11-17)

A technique to enhance the response and performance of Brillouin distributed fiber sensors is proposed and experimentally validated. The method consists in creating a multi-frequency pump pulse interacting with a matching ...