Now showing items 1-13 of 13

    • 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; Díaz Lucas, Silvia Upna; Elosúa Aguado, César Upna; Bariáin Aisa, Cándido Upna; Loayssa Lara, Alayn Upna; López-Amo Sáinz, Manuel Upna (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 ...
    • Comparative study of ring and random cavities for fiber lasers 

      Fernández Vallejo, Montserrat Upna; Rota Rodrigo, Sergio Upna; López-Amo Sáinz, Manuel Upna (Optical Society of America, 2014)   Artículo / Artikulua  OpenAccess
      An experimental comparison of three fiber laser structures with the same Raman gain medium is presented in order to establish the main pros and cons of each basic scheme. The first fiber laser is based on a hybrid ring–random ...
    • Dual stage ytterbium doped fiber laser in MOPA configuration 

      Fernández Vallejo, Montserrat Upna; Monelli, D.; Passaro, D.; Cucinotta, A.; Selleri, S.; López-Amo Sáinz, Manuel Upna (Bentham Open, 2012)   Artículo / Artikulua  OpenAccess
      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 ...
    • Internal modulation of a Random fiber laser 

      Bravo Acha, Mikel Upna; Fernández Vallejo, Montserrat Upna; López-Amo Sáinz, Manuel Upna (Optical Society of America, 2013)   Artículo / Artikulua  OpenAccess
      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 ...
    • L-band multiwavelength single-longitudinal mode fiber laser for sensing applications 

      Pérez Herrera, Rosa Ana Upna; Ullán Nieto, Ángel; Leandro González, Daniel Upna; Fernández Vallejo, Montserrat Upna; Quintela, M. A.; Loayssa Lara, Alayn Upna; López Higuera, José Miguel; López-Amo Sáinz, Manuel Upna (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 ...
    • Multiplexing of six micro-displacement suspended-core Sagnac interferometer sensors with a Raman-Erbium fiber laser 

      Bravo Acha, Mikel Upna; Fernández Vallejo, Montserrat Upna; Echapare Zabaleta, Mikel; López-Amo Sáinz, Manuel Upna; Kobelke, J.; Schuster, K. (Optical Society of America, 2013)   Artículo / Artikulua  OpenAccess
      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 ...
    • Optical fiber networks for remote fiber optic sensors 

      Fernández Vallejo, Montserrat Upna; López-Amo Sáinz, Manuel Upna (MDPI, 2012)   Artículo / Artikulua  OpenAccess
      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 ...
    • Optimization of the available spectrum of a WDM sensors network using a mode locked laser 

      Fernández Vallejo, Montserrat Upna; Ardanaz, Diego; López-Amo Sáinz, Manuel Upna (IEEE / OSA, 2015)   Artículo / Artikulua  OpenAccess
      This work experimentally proposes a new interrogation method which consists on the combination of the information given by both domains: time and frequency. On the one hand, the sensor information is obtained in the frequency ...
    • Remote (250 km) fiber Bragg grating multiplexing system 

      Fernández Vallejo, Montserrat Upna; Rota Rodrigo, Sergio Upna; López-Amo Sáinz, Manuel Upna (MDPI, 2011)   Artículo / Artikulua  OpenAccess
      We propose and demonstrate two ultra-long range fiber Bragg grating (FBG) sensor interrogation systems. In the first approach four FBGs are located 200 km from the monitoring station and a signal to noise ratio of 20 dB ...
    • Resilient amplified double ring optical networks to multiplex optical fibre sensors 

      Fernández Vallejo, Montserrat Upna; Pérez Herrera, Rosa Ana Upna; Elosúa Aguado, César Upna; Díaz Lucas, Silvia Upna; Urquhart, Paul; Bariáin Aisa, Cándido Upna; López-Amo Sáinz, Manuel Upna (IEEE / OSA, 2009)   Artículo / Artikulua  OpenAccess
      We report the experimental demonstration of two configurations of an amplified optical fibre double ring network for the multiplexing of sensors. The networks are designed to be inherently resilient to fibre failures because ...
    • Robust fiber-optic sensor networks 

      Pérez Herrera, Rosa Ana Upna; Fernández Vallejo, Montserrat Upna; López-Amo Sáinz, Manuel Upna (Springer, 2012)   Artículo / Artikulua  OpenAccess
      The ability to operate despite failure will become increasingly important as the use of optical sensor networks grows, and the amount of sensing information to be handled by a sensor network is increasing, especially for ...
    • Stability comparison of two ring resonator structures for multiwavelength fiber lasers using highly doped Er-fibers 

      Pérez Herrera, Rosa Ana Upna; Quintela, M. A.; Fernández Vallejo, Montserrat Upna; Quintela, Antonio; López-Amo Sáinz, Manuel Upna; López Higuera, José Miguel (IEEE / OSA, 2009)   Artículo / Artikulua  OpenAccess
      An experimental comparison of stability between two different fiber laser topologies is carried out. The lasers are based on ring resonators that include highly-doped Er-fibers. Both topologies use fiber Bragg grating ...
    • Suspended-core fiber Sagnac combined dual-random mirror Raman fiber laser 

      Rodrigues Pinto, Ana Margarida Upna; Bravo Acha, Mikel Upna; Fernández Vallejo, Montserrat Upna; López-Amo Sáinz, Manuel Upna; Kobelke, J.; Schuster, K. (Optical Society of America, 2011)   Artículo / Artikulua  OpenAccess
      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, ...