Recent Submissions

  • 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, ...
  • Random DFB fiber laser for remote (200 km) sensor monitoring using hybrid WDM/TDM 

    Leandro González, Daniel Upna; Miguel Soto, Verónica de Upna; Pérez Herrera, Rosa Ana Upna Orcid; Bravo Acha, Mikel Upna; López-Amo Sáinz, Manuel Upna Orcid (IEEE, 2016)   Artículo / Artikulua  OpenAccess
    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 ...
  • Simultaneous measurement of humidity and vibration based on a microwire sensor system using Fast Fourier Transform technique 

    Rota Rodrigo, Sergio Upna; López Aldaba, Aitor Upna; Pérez Herrera, Rosa Ana Upna Orcid; López Bautista, María del Carmen; López-Amo Sáinz, Manuel Upna Orcid (IEEE, 2016)   Artículo / Artikulua  OpenAccess
    This paper presents a new sensor system for vibration and relative humidity measurements based on its interaction with the evanescent field of a microwire. The interrogation of the sensing head is carried out by monitoring ...
  • 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 ...
  • 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 ...
  • Stabilization of dual-wavelength erbium doped ring fiber lasers by single-mode operation 

    Quintela, M. A.; Pérez Herrera, Rosa Ana Upna Orcid; Canales, Irene; Fernández Vallejo, Montserrat Upna; López-Amo Sáinz, Manuel Upna Orcid (IEEE, 2010)   Artículo / Artikulua  OpenAccess
    In this work, a novel single-longitudinal-mode (SLM) dual-wavelength laser configuration is proposed and demonstrated. This laser is based on ring resonators, and employs fiber Bragg gratings to select the operation ...
  • 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 ...
  • All-fiber lasers through photonic crystal fibers 

    Rodrigues Pinto, Ana Margarida Upna; López-Amo Sáinz, Manuel Upna Orcid (Science Wise Publishing & De Gruyter, 2013)   Artículo / Artikulua  OpenAccess
    A review on all-fiber lasers based on photonic crystal fibers is presented. Photonic crystal fibers present improved features beyond what conventional optical fibers can offer. Due to their geometric versatility, photonic ...
  • Comparative study of ring and random cavities for fiber lasers 

    Fernández Vallejo, Montserrat Upna; Rota Rodrigo, Sergio Upna; López-Amo Sáinz, Manuel Upna Orcid (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 ...
  • Internal modulation of a Random fiber laser 

    Bravo Acha, Mikel Upna Orcid; Fernández Vallejo, Montserrat Upna; López-Amo Sáinz, Manuel Upna Orcid (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 ...
  • Experimental evidence of coherence resonance in a time-delayed bistable system 

    Arizaleta Arteaga, Mikel Upna Orcid; Valencia, Miguel; Sciamanna, Marc; Thienpont, Hugo; López-Amo Sáinz, Manuel Upna Orcid; Panajotov, Krassimir (APS Physics, 2007)   Artículo / Artikulua  OpenAccess
    We report on the experimental observation of coherence resonance in a bistable system with delay. Our system consists of a vertical-cavity surface-emitting laser subject to time-delayed optical feedback simultaneously from ...
  • Polarized optical feedback from an extremely short external cavity for controlling and stabilizing the polarization of vertical cavity surface emitting lasers 

    Arizaleta Arteaga, Mikel Upna Orcid; Parriaux, Olivier; López-Amo Sáinz, Manuel Upna Orcid; Thienpont, Hugo; Panajotov, Krassimir (AIP Publishing, 2007)   Artículo / Artikulua  OpenAccess
    The authors present experimental results showing that polarization selective optical feedback from an extremely short external cavity induces switching between the two fundamental transverse modes with orthogonal linear ...
  • Simultaneous measurement of strain and temperature based on clover microstructured fiber loop mirror 

    Pérez Herrera, Rosa Ana Upna Orcid; André, R. M.; Silva, S. F.; Becker, M.; Schuster, K.; Kobelke, J.; López-Amo Sáinz, Manuel Upna Orcid; Santos, José Luís; Frazão, Orlando (Elsevier, 2015)   Artículo / Artikulua  OpenAccess
    In this work, two all-fiber loop mirrors using a clover microstructured fiber for the simultaneous measurement of temperature and strain are presented. The sensing heads are formed by a short piece of clover microstructured ...
  • Role of external cavity reflectivity for achieving polarization control and stabilization of vertical cavity surface emitting laser 

    Arizaleta Arteaga, Mikel Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid; Thienpont, Hugo; Panajotov, Krassimir (AIP Publishing, 2007)   Artículo / Artikulua  OpenAccess
    The authors present the experimental results showing how the external mirror reflectivity affects the polarization properties of a vertical cavity surface emitting laser subject to optical feedback from an extremely short ...
  • Tailoring light polarization in vertical cavity surface emitting lasers by isotropic optical feedback from an extremely short external cavity 

    Arizaleta Arteaga, Mikel Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid; Thienpont, Hugo; Panajotov, Krassimir (AIP Publishing, 2006)   Artículo / Artikulua  OpenAccess
    The authors experimentally show that isotropic optical feedback from an extremely short external cavity can induce switching between the two fundamental transverse modes with orthogonal linear polarization of otherwise ...
  • 250 km ultra long remote sensor system based on a fiber loop mirror interrogated by an OTDR 

    Bravo Acha, Mikel Upna Orcid; Baptista, José Manuel; Santos, José Luís; López-Amo Sáinz, Manuel Upna Orcid; Frazão, Orlando (Optical Society of America, 2011)   Artículo / Artikulua  OpenAccess
    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 ...
  • Simultaneous strain and temperature multipoint sensor based on microstructured optical fiber 

    López Aldaba, Aitor Upna; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe; López-Amo Sáinz, Manuel Upna Orcid (IEEE, 2018)   Artículo / Artikulua  OpenAccess
    In this paper, a new sensor system for simultaneous and independent multipoint strain and temperature measurements is presented. The interrogation of the sensing heads has been carried out by monitoring their FFT phase ...
  • All-PM fiber loop mirror interferometer analysis and simultaneous measurement of temperature and mechanical vibration 

    Leandro González, Daniel Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (IEEE, 2018)   Artículo / Artikulua  OpenAccess
    In this work, a new all-polarization maintaining (PM) fiber loop mirror interferometer is proposed and validated as temperature and mechanical vibration sensor. The scheme employs the arms of a PM coupler as communication ...
  • Tunable SESAM-based mode-locked soliton fiber laser in linear cavity by axial-strain applied to a FBG 

    Aporta, I.; Leandro González, Daniel Upna Orcid; Quintela, M. A.; Pérez Herrera, Rosa Ana Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid; López Higuera, José Miguel (IEEE, 2017)   Artículo / Artikulua  OpenAccess
    A self-started stable tunable mode-locked (ML) soliton fiber laser in a linear cavity structure composed by commercial passive elements is presented in this paper. It is based on the combination of an Erbium doped fiber ...
  • Double-port slotted-antenna with multiple miniaturized radiators for wideband wireless communication systems and portable devices 

    Alibakhshikenari, Mohammad; Khalily, Mohsen; Virdee, Bal S.; Ali, Abdul; Shukla, Panchamkumar; See, Chan H.; Abd-Alhameed, Raed; Falcone Lanas, Francisco Javier Upna Orcid; Limiti, Ernesto (Electromagnetics Academy, 2019)   Artículo / Artikulua  OpenAccess
    Proof-of-concept is presented of a novel slot antenna structure with two excitation ports. Although this antenna provides a wide impedance bandwidth, its peak gain and optimum radiation efficiency are observed at its ...

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