Listar Artículos de revista DIEE - IEES Aldizkari artikuluak por autor UPNA "Bravo Acha, Mikel"
Mostrando ítems 1-15 de 15
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250 km ultra long remote sensor system based on a fiber loop mirror interrogated by an OTDR
Bravo Acha, Mikel
; Baptista, José Manuel; Santos, José Luís; López-Amo Sáinz, Manuel ; Frazão, Orlando (Optical Society of America, 2011)
Artículo / Artikulua 
A 253 km ultra long remote displacement sensor system based on a fiber loop mirror interrogated by a commercial OTDR is proposed and experimentally demonstrated. The use of a fiber loop mirror increases the signal to noise ... -
Application of remote power-by-light switching in a simplified BOTDA sensor network
Bravo Acha, Mikel ; Zornoza Indart, Ander; Loayssa Lara, Alayn ; López-Amo Sáinz, Manuel ; López Higuera, José Miguel; Ullán Nieto, Ángel (MDPI, 2013)
Artículo / Artikulua
We propose and demonstrate the use of spatial multiplexing as a means to reduce the costs of distributed sensing networks. We propose a new scheme in which remote power-by-light switching is deployed to scan multiple ... -
Concrete beam bending test monitorization using a high strain fiber optic sensor
Bravo Acha, Mikel ; Sáenz, J.; Bravo Navas, M.; López-Amo Sáinz, Manuel (IEEE / OSA, 2012)
Artículo / Artikulua
In this work the development of an 'eight-shape' fiber optic sensor for high strain measurement is experimentally demonstrated. This strain sensor is interrogated using a commercial optical time domain reflectometer through ... -
Fully switchable multi-wavelength fiber lasers based on random distributed feedback for sensors interrogation
Bravo Acha, Mikel ; Miguel Soto, Verónica de ; Ortigosa Cayetano, Amaia; López-Amo Sáinz, Manuel (IEEE / OSA, 2015)
Artículo / Artikulua
In this paper, the experimental study and characterization of a novel real-time switchable multi-wavelength fiber laser has been carried out. Two different gain materials, such as a 50 km SMF and a 2.5 km DCF fibers were ... -
High resolution polarization-independent highbirefringence fiber loop mirror sensor
Leandro González, Daniel ; Bravo Acha, Mikel ; López-Amo Sáinz, Manuel (Optical Society of America, 2015)
Artículo / Artikulua
In this work, two all polarization-maintaining (PM) highbirefringence (Hi-Bi) fiber loop mirrors (FLM) which are immune to external polarization perturbations are validated both theoretically and experimentally. Simplified ... -
An in-reflection strain sensing head based on a Hi-Bi photonic crystal fiber
Rota Rodrigo, Sergio; Rodrigues Pinto, Ana Margarida ; Bravo Acha, Mikel ; López-Amo Sáinz, Manuel (MDPI, 2013)
Artículo / Artikulua
A photonic crystal fiber-based sensing head is proposed for strain measurements. The sensor comprises a Hi-Bi PCF sensing head to measure interferometric signals in-reflection. An experimental background study of the sensing ... -
Internal modulation of a Random fiber laser
Bravo Acha, Mikel ; Fernández Vallejo, Montserrat ; López-Amo Sáinz, Manuel (Optical Society of America, 2013)
Artículo / Artikulua
A characterization of a modulated random mirror laser has been experimentally carried out. Unlike conventional internally modulated fiber lasers, no distortion of the modulating frequency or self-mode-locking effects were ... -
Micro-displacement sensor combined with a fiber ring interrogated by an optical time-domain reflectometer
Bravo Acha, Mikel ; Baptista, José Manuel; Santos, José Luís; López-Amo Sáinz, Manuel ; Frazão, Orlando (IEEE, 2014)
Artículo / Artikulua
A micro-displacement sensing head based on two aligned cleaved fibers inserted into an optical fiber ring and interrogated by an OTDR is presented. The sensor configuration is characterized for measuring both longitudinal ... -
Multiplexing of six micro-displacement suspended-core Sagnac interferometer sensors with a Raman-Erbium fiber laser
Bravo Acha, Mikel ; Fernández Vallejo, Montserrat ; Echapare Zabaleta, Mikel; López-Amo Sáinz, Manuel ; Kobelke, J.; Schuster, K. (Optical Society of America, 2013)
Artículo / Artikulua
This work experimentally demonstrates a long-range optical fiber sensing network for the multiplexing of fiber sensors based on photonic crystal fibers. Specifically, six photonic crystal fiber sensors which are based ... -
Novel sensor design using photonic crystal fibres for monitoring the onset of corrosion in reinforced concrete structures
McCague, Colum; Fabian, Matthias; Karimi, Mohammad; Bravo Acha, Mikel ; Jaroszewicz, Leszek R. (IEEE, 2014)
Artículo / Artikulua
In this paper, a novel sensing technique has been designed and investigated for the direct, in situ detection of steel corrosion distributed in reinforced concrete structures. At present, structural health monitoring in ... -
Random DFB fiber laser for remote (200 km) sensor monitoring using hybrid WDM/TDM
Leandro González, Daniel ; Miguel Soto, Verónica de ; Pérez Herrera, Rosa Ana ; Bravo Acha, Mikel ; López-Amo Sáinz, Manuel (IEEE, 2016)
Artículo / Artikulua
In this paper, a random distributed feedback fiber laser is proposed as a multiplexing scheme for ultralong range measurements (up to 200 km). Optical fiber sensors are time and wavelength multiplexed overcoming one of the ... -
Real-time FFT analysis for interferometric sensors multiplexing
Leandro González, Daniel ; Bravo Acha, Mikel ; Ortigosa Cayetano, Amaia; López-Amo Sáinz, Manuel (IEEE / OSA, 2015)
Artículo / Artikulua
In this paper, a theoretical and experimental study of two interferometric sensor multiplexing schemes has been carried out by means of the fast Fourier transform (FFT) analysis. This work addresses one of the main drawbacks ... -
Remote-time division multiplexing of bending sensors using a broadband light source
Bravo Acha, Mikel ; López-Amo Sáinz, Manuel (Hindawi Publishing Corporation, 2012)
Artículo / Artikulua
This work experimentally demonstrates a remote sensing network which interrogates bending sensors using time-division multiplexing techniques and a broadband light source. The bending sensors are located 50 km away from ... -
Slow-light and enhanced sensitivity in a displacement sensor using a lossy fiber-based ring resonator
Bravo Acha, Mikel ; Angulo Vinuesa, X.; Martín López, Sonia; López-Amo Sáinz, Manuel ; González Herráez, Miguel (IEEE / OSA, 2013)
Artículo / Artikulua
Along the last years, much debate has been done on the efficiency of slow-light phenomena in order to enhance lightmatter interactions, especially for sensing purposes. This improvement could be key to develop more compact ... -
Suspended-core fiber Sagnac combined dual-random mirror Raman fiber laser
Rodrigues Pinto, Ana Margarida; Bravo Acha, Mikel ; Fernández Vallejo, Montserrat ; López-Amo Sáinz, Manuel ; Kobelke, J.; Schuster, K. (Optical Society of America, 2011)
Artículo / Artikulua
In the present work, a multiwavelength fiber laser based in the combination of a double-random mirror and a suspended-core Sagnac interferometer is presented. The double-random mirror acts by itself as a random laser, ...
