TECNOLOGIAS PARA SENSORES DE FIBRA OPTICA I

TEC2010-20224-C02-01

Nombre agencia financiadora Ministerio de Ciencia e Innovación
Acrónimo agencia financiadora MICINN
Programa Programa Nacional de Investigación Fundamental
Subprograma Investigación fundamental no-orientada
Convocatoria Investigación fundamental no-orientada
Año convocatoria 2010
Unidad de gestión Subdirección General de Proyectos de Investigación
Centro beneficiario UNIVERSIDAD PÚBLICA DE NAVARRA (UPNA)
Centro realización UNIVERSIDAD PÚBLICA DE NAVARRA (UPNA)
Identificador persistente http://dx.doi.org/10.13039/501100004837

Publicaciones

Found(s) 16 result(s)
Found(s) 2 page(s)

Compound Lasing Fiber Optic Ring Resonators for Sensor Sensitivity Enhancement

e_Buah Biblioteca Digital Universidad de Alcalá
  • Rota Rodrigo, Sergio
  • González Herráez, Miguel
  • López Amo, M.
In this study, a new method for increasing simultaneously the sensitivity and interrogation stability of fiber-optic intensity sensors is presented. The configuration is based on a double-coupler ring resonator. On one side, the attenuation sensitivity of the sensor is enhanced by placing it inside a ring resonator. On the other side, the stability of the interrogation method is widely improved by creating an external lasing ring resonator with matched spectral response. The combination of the wavelength selective response of the ring resonator and optical amplification from Er-doped fiber amplifier is used to create different fiber lasers. The resulting lasers present an impressive sensitivity enhancement and a dynamic range increment up to 15 dB. Simultaneously, the instability of the system is reduced to ±0.05 dB. In comparison with systems based on tunable laser interrogation, our method is >100 times more stable and also simpler, as no wavelength tunable elements are required., Ministerio de Economía y Competitividad, European Commission




Versatile all-fiber slow-light assisted sensor

e_Buah Biblioteca Digital Universidad de Alcalá
  • Bravo, M.
  • Angulo Vinuesa, Xabier
  • Martín López, Sonia
  • López-Amo, M.
  • González Herráez, Miguel
We present theoretical and experimental results on a slow-light assisted all-fiber configuration that can be used for
efficient sensing of a variety of parameters (pressure, displacement...). In particular, we report here a structure that can be
transformed into a slow-light assisted displacement sensor capable of sub-micrometric resolution values with a
potentially simple intensiometric measurement scheme. The basic element in the structure is a lossy ring resonator tuned
close to the critical coupling regime. In this working regime, the resonator transfer function displays extremely high
group delay values close to the resonances, and, accordingly, a large sensitivity to additional losses. A mechanic
transducer transforms displacement into small additional losses in the ring. This leads to strong variations in the log
transmission of the resonances, which are shown to scale with the group index. This scheme shows orders of magnitude
sensitivity enhancements over a conventional bending-loss configuration. We believe that this structure can be further
developed to provide large sensitivity enhancements to conventional intensiometric fiber sensors., European Commission, Ministerio de Economía y Competitividad, Comunidad de Madrid, Ministerio de Ciencia e Innovación




Compound lasing fiber optic ring resonators for sensing

e_Buah Biblioteca Digital Universidad de Alcalá
  • Rota Rodrigo, Sergio
  • González Herráez, Miguel
  • López Amo, M.
In this work, we present a new method for increasing simultaneously the sensitivity and interrogation stability of fiberoptic intensity sensors. The configuration is based on a double-coupler ring resonator. On one side, the attenuation sensitivity of the sensor is enhanced by placing it inside a ring resonator. On the other side, the stability of the interrogation method is rendered close to perfect by creating an external lasing ring resonator with matched spectral response. The resulting lasers allow the stable interrogation of the sensors with an impressive sensitivity enhancement. In our experiments, the dynamic range of the intensity sensor (and consequently its sensitivity) is increased 15 dB by using this laser-based interrogation system. Simultaneously, the instability of the system is reduced to ±0.05 dB. In comparison with systems based on external interrogation, our method is <100 times more stable and also simpler, as no wavelength tunable elements are required., Ministerio de Ciencia e Innovación, Ministerio de Economía y Competitividad, European Commission




Slow-light and enhanced sensitivity in a displacement sensor using a lossy fiber-based ring resonator, Slow-light assisted displacement sensor using a lossy fiber-based ring resonator

e_Buah Biblioteca Digital Universidad de Alcalá
  • Bravo, M.
  • Angulo Vinuesa, Xabier
  • Martín López, Sonia
  • López-Amo, M.
  • González Herráez, Miguel
Along the last years, much debate has been done on the efficiency of slow-light phenomena in order to enhance light-matter interactions, especially for sensing purposes. This improvement could be key to develop more compact and sensitive devices. In this work we develop an all-fiber sub-micrometric displacement sensor using slow-light sensitivity enhancement in a lossy ring resonator. In the proposed structure the losses produced by the displacement of a mechanic transducer can be translated into strong variations of group index and therefore strong transmittance variations. We show that this effect is strictly related to slow light, and not related to confinement effects or any other., European Commission, Ministerio de Economía y Competitividad, Comunidad de Madrid, Ministerio de Ciencia e Innovación




Turning a low Q fiber resonator into a high-sensitivity displacement sensor using slow light concepts

e_Buah Biblioteca Digital Universidad de Alcalá
  • Bravo, M.
  • Angulo Vinuesa, Xabier
  • Martín López, Sonia
  • López-Amo, M.
  • González Herráez, Miguel
High-Q resonators have been widely used for sensing purposes. High Q factors normally lead to sharp spectral peaks which accordingly provide a strong sensitivity in spectral interrogation methods. In this work we employ a low-Q ring resonator to develop a high sensitivity sub-micrometric resolution displacement sensor. We use the slow-light effects occurring close to the critical coupling regime to achieve high sensitivity in the device. By tuning the losses in the cavity close to the critical coupling, extremely high group delay variations can be achieved, which in turn introduce strong enhancements of the absorption of the structure. We first validate the concept using an Optical Vector Analyzer (OVA) and then we propose a simple functional scheme for achieving a low-cost interrogation of this kind of sensors., European Commission, Ministerio de Ciencia e Innovación, Comunidad de Madrid, Ministerio de Economía y Competitividad




Wide range group delay tuning in lossy fiber ring resonators

e_Buah Biblioteca Digital Universidad de Alcalá
  • Angulo Vinuesa, Xabier
  • Bravo, M.
  • Martín López, Sonia
  • López-Amo, M.
  • González Herráez, Miguel
22nd International Conference on Optical Fiber Sensors, OFS 2012, Beijing, China, 15-19 Oct. 2012, We demonstrate theoretically and experimentally that a wide-range tuning of group delay values can be achieved in a
lossy fiber ring resonator. The tuning mechanism relies simply on varying the loss/coupling ratio in the resonator. This
simple structure may be used advantageously in different regimes for many sensing configurations, both for achieving
extremely high sensitivity enhancements (by working close to critical coupling, where the group index becomes
extremely large) or suppression of undesired refractive index effects (e.g. Kerr effect), by working in the under-coupled
regime., Ministerio de Ciencia e Innovación, Comunidad de Madrid




Optical fiber networks for remote fiber optic sensors

Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
  • Fernández Vallejo, Montserrat
  • 0000-0002-9399-5398
This paper presents an overview of optical fiber sensor networks for remote sensing. Firstly, the state of the art of remote fiber sensor systems has been considered. We have summarized the great evolution of these systems in recent years; this progress confirms that fiber-optic remote sensing is a promising technology with a wide field of practical applications. Afterwards, the most representative remote fiber-optic sensor systems are briefly explained, discussing their schemes, challenges, pros and cons. Finally, a synopsis of the main factors to take into consideration in the design of a remote sensor system is gathered., This work was supported by the Spanish Government project TEC2010-20224-C02-01.




An in-reflection strain sensing head based on a Hi-Bi photonic crystal fiber

Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
  • Rota Rodrigo, Sergio
  • Rodrigues Pinto, Ana Margarida
  • 0000-0001-8893-8738
  • 0000-0002-9399-5398
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 head is conducted through an optical backscatter reflectometer confirming the theoretical predictions, also included. A cost effective setup is proposed where a laser is used as illumination source, which allows accurate high precision strain measurements. Thus, a sensitivity of ~7.96 dB/me was achieved in a linear region of 1,200 μe., The authors are grateful to the Spanish government projects TEC2010-20224-C02-01 and Innocampus.




Application of remote power-by-light switching in a simplified BOTDA sensor network

Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
  • 0000-0001-8893-8738
  • Zornoza Indart, Ander
  • 0000-0002-6502-6135
  • 0000-0002-9399-5398
  • López Higuera, José Miguel
  • Ullán Nieto, Ángel
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 branches of a distributed sensing network based on Brillouin Optical Time Domain Analysis (BOTDA) sensors. A proof-of-concept system is assembled with two 5-km sensor fiber branches that are alternatively monitored using a fast remotely controlled and optically powered optical switch. The multiplexed distributed sensor fibers were located 10 km away from the interrogation unit and a Raman pump is used to remotely power the switch. Furthermore, the deployed BOTDA unit uses an alternative configuration that can lead to simplified setups., This work was supported by the Spanish Government projects TEC2010-20224-C01 and TEC2010-20224-C02.




Dual stage ytterbium doped fiber laser in MOPA configuration

Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
  • Fernández Vallejo, Montserrat
  • Monelli, D.
  • Passaro, D.
  • Cucinotta, A.
  • Selleri, S.
  • 0000-0002-9399-5398
We report the experimental demonstration of an Ytterbium doped fiber laser (YDFL) composed by two stages in cascade. Two sorts of Ytterbium doped fiber (YDF) with different concentration have been used. A proper characterization of the YDFs has been performed in order to find the optimum YDF length. To this end, the output power and the slope-efficiency have been calculated and the signal amplification and the amplified spontaneous emission (ASE) spectra have been analyzed, which are strictly related to the absorption and emission cross-section of the YDF. The first stage has been studied for both continuous wave (CW) and pulsed regime. The results show that by using an YDF with a high slope-efficiency, up to 66%, it is possible to reach an emitted peak power of 30 W in a pulsed regime., This work was supported by the Spanish Government
projects TEC2007-67987-C02 and TEC2010-20224-C02-01,
the European COST action-299 and the Spain-Italy
Cooperation Project “Development of new all-fiber lasers for
telecom, sensors and industrial applications”.