Now showing items 1-20 of 37

    • 46-km-long Raman amplified hybrid double-bus network with point and distributed Brillouin sensors 

      Fernández Vallejo, Montserrat Upna; Olier Aguado, David; Zornoza Indart, Ander; Pérez Herrera, Rosa Ana Upna Orcid; Díaz Lucas, Silvia Upna Orcid; Elosúa Aguado, César Upna Orcid; Bariáin Aisa, Cándido Upna Orcid; Loayssa Lara, Alayn Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (IEEE, 2012)   Artículo / Artikulua  OpenAccess
      We experimentally demonstrate a 46-km hybrid network that combine point and distributed Brillouin sensors. The proposed sensor network multiplexes low-cost intensity point sensors based on fiber-optic tapers, which are ...
    • ECOAL project: delivering solutions for integrated monitoring of coal-related fires supported on optical fiber sensing technology 

      Ribeiro, Joana; Viveiros, Duarte; Ferreira, João; López Gil, Alexia; Domínguez López, Alejandro; Martins, Hugo F.; Pérez Herrera, Rosa Ana Upna Orcid; López Aldaba, Aitor Upna; Duarte, Lia; Rodrigues Pinto, Ana Margarida Upna; Martín López, Sonia; Baierl, Hardy; Jamier, Raphael; Rougier, Sébastien; Auguste, Jean-Louis; Teodoro, Ana Cláudia; Gonçalves, José Alberto; Esteban, Óscar; Santos, José Luís; Roy, Philippe; López-Amo Sáinz, Manuel Upna Orcid; González Herráez, Miguel; Baptista, José Manuel; Flores, Deolinda (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      The combustion of coal wastes resulting from mining is of particular environmental concern, and the importance of proper management involving real-time assessment of their status and identification of probable evolution ...
    • Experimental optimization in terms of power stability and output power of highly Er-doped fiber lasers with single and hybrid cavities 

      Pérez Herrera, Rosa Ana Upna Orcid; Chen, Shuying; Zhao, Weizhong; Sun, Tong; López-Amo Sáinz, Manuel Upna Orcid (Taylor & Francis, 2010)   Artículo / Artikulua  OpenAccess
      In this article, the output power stability of several different highly erbiumdoped fiber ring lasers, as a function of the laser parameters, is experimentally investigated. The study is focused on the optimization of ...
    • Fiber cavity ring down and gain amplification effect 

      Silva, Susana; Magalhães, Regina; Pérez Herrera, Rosa Ana Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid; Marques, M. B.; Frazão, Orlando (Springer Nature, 2016)   Artículo / Artikulua  OpenAccess
      The effect of an erbium-doped fiber amplifier (EDFA) placed inside the fiber ring of a cavity ring down (CRD) configuration is studied. The limitations and advantages of this configuration are discussed, and the study of ...
    • Fiber optic sensor networks 

      Pérez Herrera, Rosa Ana Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (Elsevier, 2013)   Artículo / Artikulua  OpenAccess
      One of the main goals in fiber optic sensor technology is to multiplex together a high number of sensorsin the same network in order to share expensive terminal equipment and develop a system including multiple measuring ...
    • Frequency modulated continuous wave system for optical fiber intensity sensors with optical amplification 

      Pérez Herrera, Rosa Ana Upna Orcid; Frazão, Orlando; Santos, José Luís; Araújo, Francisco Moita; Ferreira, Luis Alberto; Baptista, José Manuel; López-Amo Sáinz, Manuel Upna Orcid (IEEE, 2009)   Artículo / Artikulua  OpenAccess
      We report on the use of erbium doped fiber (EDF) amplification to enhance a frequency modulated continuous wave (FMCW) technique for referencing optical intensity sensors located between two Bragg grating structures. The ...
    • Gamma radiation measurements using an optical fiber laser 

      Pérez Herrera, Rosa Ana Upna Orcid; Stancalie, Andrei; Cabezudo Sánchez-Valverde, Pablo Miguel; Sporea, Dan; Negut, Daniel; López-Amo Sáinz, Manuel Upna Orcid (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A fiber ring laser cavity configuration was used to analyze the effect of gamma-irradiation over the performance of different types of erbium doped fibers. Preliminary results validates this method to monitor gamma-radiation ...
    • Gamma radiation-induced effects over an optical fiber laser: towards new sensing applications 

      Pérez Herrera, Rosa Ana Upna Orcid; Stancalie, Andrei; Cabezudo Sánchez-Valverde, Pablo Miguel; Sporea, Dan; López-Amo Sáinz, Manuel Upna Orcid (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      In the present work, the effect of gamma radiation on the performance of different types of erbium-doped fibers (EDFs) when they are used in a fiber ring cavity (FRC) configuration is studied. Several pieces of commercial ...
    • High sensitivity fiber-optic liquid level sensor using biconical tapered fibers 

      Júdez Colorado, Aitor Upna; Leandro González, Daniel Upna Orcid; Pérez Herrera, Rosa Ana Upna Orcid; Galarza Galarza, Marko Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A liquid level sensor is presented using a biconical tapered standard single-mode fiber, being its main characteristic an outstanding sensitivity for a low cost transducer. Temperature compensation is enabled with the same ...
    • Hybrid Raman‑erbium random fiber laser with a half open cavity assisted by artificially controlled backscattering fiber refectors 

      Pérez Herrera, Rosa Ana Upna Orcid; Roldán Varona, Pablo; Sañudo-Lasagabaster Ibáñez, Silvia; Rodríguez Cobo, L.; López Higuera, José Miguel; López-Amo Sáinz, Manuel Upna Orcid (Springer Nature, 2021)   Artículo / Artikulua  OpenAccess
      A hybrid Raman-erbium random fber laser with a half-open cavity assisted by chirped artifcially controlled backscattering fber refectors is presented. A combination of a 2.4 km-long dispersion compensating fber with two ...
    • Influence of saturable absorbers on fiber ring laser sensors 

      Rodríguez Cobo, L.; Quintela, M. A.; Ruiz Lombera, Rubén; Pérez Herrera, Rosa Ana Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid; López Higuera, José Miguel (SPIE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work, a fiber ring laser sensor has been employed to analyze the influence of passive Er-doped fiber acting as saturable absorber. Lasing modes of fiber ring lasers can be reduced by properly locating a saturable ...
    • L-band multiwavelength single-longitudinal mode fiber laser for sensing applications 

      Pérez Herrera, Rosa Ana Upna Orcid; Ullán Nieto, Ángel; Leandro González, Daniel Upna Orcid; Fernández Vallejo, Montserrat Upna; Quintela, M. A.; Loayssa Lara, Alayn Upna Orcid; López Higuera, José Miguel; López-Amo Sáinz, Manuel Upna Orcid (IEEE / OSA, 2012)   Artículo / Artikulua  OpenAccess
      In this work, a novel single-longitudinal-mode (SLM) four-wavelength laser configuration for sensing applications in the L-band is proposed and experimentally demonstrated. The sensor system presented here is based on ring ...
    • Láseres de fibra óptica 

      Pérez Herrera, Rosa Ana Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (Versys, 2011)   Artículo / Artikulua  OpenAccess
      Desde su desarrollo en los años 60 hasta nuestros días, los láseres de fibra óptica han ido incrementando su importancia en diversos ámbitos de nuestra vida. Ya sea en la medicina, la electrónica de consumo o la industria, ...
    • Liquid level sensor based on dynamic Fabry–Perot interferometers in processed capillary fiber 

      Roldán Varona, Pablo; Pérez Herrera, Rosa Ana Upna Orcid; Rodríguez Cobo, L.; Reyes González, Luis; López-Amo Sáinz, Manuel Upna Orcid (Springer Nature, 2021)   Artículo / Artikulua  OpenAccess
      In this work, a novel optical fiber sensor capable of measuring both the liquid level and its refractive index is designed, manufactured and demonstrated through simulations and experimentally. For this, a silica capillary ...
    • Long-range hybrid network with point and distributed Brillouin sensors using Raman amplification 

      Zornoza Indart, Ander; Pérez Herrera, Rosa Ana Upna Orcid; Elosúa Aguado, César Upna Orcid; Díaz Lucas, Silvia Upna Orcid; Bariáin Aisa, Cándido Upna Orcid; Loayssa Lara, Alayn Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (Optical Society of America, 2010)   Artículo / Artikulua  OpenAccess
      We propose a novel concept for hybrid networks that combine point and distributed Brillouin sensors in a cost-effective architecture that also deploys remote distributed Raman amplification to extend the sensing range. A ...
    • Low noise dual-wavelength erbium fiber laser in single-longitudinal-mode operation 

      Rota Rodrigo, Sergio Upna; Pérez Herrera, Rosa Ana Upna Orcid; Fernández Vallejo, Montserrat Upna; López-Amo Sáinz, Manuel Upna Orcid (Springer, 2012)   Artículo / Artikulua  OpenAccess
      A new stable dual-wavelength fiber-ring laser based on erbium-doped fiber amplification is reported. The laser is based on ring resonators and employs fiber Bragg gratings to select the operation wavelengths. The ...
    • Micro-drilled optical fiber for enhanced laser strain sensors 

      Pérez Herrera, Rosa Ana Upna Orcid; Bravo Acha, Mikel Upna Orcid; Roldán Varona, Pablo; Leandro González, Daniel Upna Orcid; Rodríguez Cobo, L.; López Higuera, José Miguel; López-Amo Sáinz, Manuel Upna Orcid (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work, we present an experimental measurement of temperature and strain sensitivities of a micro-drilled optical fiber (MDOF). The MDOF consisted of a quasi-randomly distributed reflector along a single mode fiber ...
    • Modulated fiber ring laser and its application in high-sensitivity temperature sensors 

      Pérez Herrera, Rosa Ana Upna Orcid; Tainta Ausejo, Santiago Upna Orcid; Erro Betrán, María José Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (SPIE, 2016)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This work presents an experimental demonstration of a scheme based on an internally modulated fiber ring laser for high-sensitivity temperature sensing. The attained temperature resolution has been as low as ± 2pm even ...
    • Multiparameter sensor based on a multiinterferometric serial configuration for temperature and strain measurements 

      Pérez Herrera, Rosa Ana Upna Orcid; Bravo Acha, Mikel Upna Orcid; Leandro González, Daniel Upna Orcid; Novais, Susana; Pradas Martínez, Javier; López-Amo Sáinz, Manuel Upna Orcid (IEEE, 2021)   Artículo / Artikulua
      In this work, a multi-parameter point sensor based on the combination of Fabry-Perot (FP) and the anti-resonant (AR) reflecting guidance in cascade configuration is proposed and experimentally demonstrated. This structure, ...
    • Multiplexing optical fiber Fabry-Perot interferometers based on air-microcavities 

      Pérez Herrera, Rosa Ana Upna Orcid; Novais, Susana; Bravo Acha, Mikel Upna Orcid; Leandro González, Daniel Upna Orcid; Silva, Susana; Frazão, Orlando; López-Amo Sáinz, Manuel Upna Orcid (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work we demonstrate the multiplexing capability of new optical fiber Fabry-Perot interferometers based on airmicrocavities using a commercial FBG interrogator. Three optimized air-microcavity interferometer sensors ...