Now showing items 1-18 of 18

    • Compensation of nonlocal effects induced by the extinction ratio of pump pulses in Brillouin optical time-domain analysis sensors 

      Mariñelarena Ollacarizqueta, Jon Upna; Iribas Pardo, Haritz Upna; Urricelqui Polvorinos, Javier Upna; Loayssa Lara, Alayn Upna (Optical Society of America, 2019)   Artículo / Artikulua  OpenAccess
      We demonstrate a technique to compensate the nonlocal effects that appear in Brillouin optical time-domain analysis sensors when pump pulses with limited extinction ratio are deployed. These recently discovered nonlocal ...
    • Contributions to the development of Brillouin distributed sensors for structural health monitoring 

      Mariñelarena Ollacarizqueta, Jon Upna (2019)   Tesis doctoral / Doktoretza tesia  OpenAccess
      The main objectives of this thesis is to contribute to the enhancement of the performance of distributed optical ber sensors (DOFS) based on stimulated Brillouin scattering (SBS) by analyzing their limitations and proposing ...
    • Cost-effective Brillouin optical time-domain analysis sensor using a single optical source and passive optical filtering 

      Iribas Pardo, Haritz Upna; Urricelqui Polvorinos, Javier Upna; Mariñelarena Ollacarizqueta, Jon Upna; Sagüés García, Mikel Upna; Loayssa Lara, Alayn Upna (Hindawi Publishing Corporation, 2016)   Artículo / Artikulua  OpenAccess
      We present a simplified configuration for distributed Brillouin optical time-domain analysis sensors that aims to reduce the cost of the sensor by reducing the number of components required for the generation of the two ...
    • Detrimental effects in Brillouin distributed sensors caused by EDFA transient 

      Feng, Cheng; Iribas Pardo, Haritz Upna; Mariñelarena Ollacarizqueta, Jon Upna; Schneider, Thomas; Loayssa Lara, Alayn Upna (Optical Society of AmericaIEEE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We investigate the deleterious effect and the error in Brillouin optical time-domain analyzers induced by the combination of a low extinction ratio pulse generation with the transient behavior of erbium-doped fiber amplifiers.
    • Dual-probe linearly-configured BOCDA system with enlarged modulation amplitude 

      Mariñelarena Ollacarizqueta, Jon Upna; Kim, Yong Hyun; Loayssa Lara, Alayn Upna; Song, Kwang Yong (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We present and experimentally demonstrated a linearly-configured Brillouin optical correlation domain analysis (LC-BOCDA) system that allows large modulation amplitude (Δf) based on a dual probe wave and the control of ...
    • Effects of pump pulse extinction ratio in Brillouin optical time-domain analysis sensors 

      Iribas Pardo, Haritz Upna; Mariñelarena Ollacarizqueta, Jon Upna; Feng, Cheng; Urricelqui Polvorinos, Javier Upna; Schneider, Thomas; Loayssa Lara, Alayn Upna (Optical Society of America, 2017)   Artículo / Artikulua  OpenAccess
      We report on two previously unknown non-local effects that have been found to impair Brillouin optical time-domain analysis (BOTDA) sensors that deploy limited extinction ratio (ER) pump pulses. The first one originates ...
    • Egituren egoeraren monitorizaziorako zuntz optikoan oinarritutako sentsore sinplifikatua 

      Iribas Pardo, Haritz Upna; Sagüés García, Mikel Upna; Mariñelarena Ollacarizqueta, Jon Upna; Loayssa Lara, Alayn Upna (Udako Euskal Unibertsitatea, 2015)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Brillouin hedatuko denbora eremu optikoaren analisian (BOTDA) oinarritutako sentsoreak, estruktura handien (100 km luzerako estrukturak) deformazioa eta tenperatura neurtzeko gaitasuna dute. Lan honetan, BOTDA konfigurazio ...
    • Enhancement of the dynamic range in slope-assisted coherent brillouin optical time-domain analysis sensors 

      Mariñelarena Ollacarizqueta, Jon Upna; Urricelqui Polvorinos, Javier Upna; Loayssa Lara, Alayn Upna (IEEE, 2017)   Artículo / Artikulua  OpenAccess
      We present two techniques that provide an extension of the dynamic range of coherent Brillouin optical time-domain analysis (BOTDA) sensors for dynamic measurements. This type of BOTDA sensors rely on self-heterodyne ...
    • Gain dependence of measured spectra in coherent Brillouin optical time-domain analysis sensors 

      Mariñelarena Ollacarizqueta, Jon Upna; Urricelqui Polvorinos, Javier Upna; Loayssa Lara, Alayn Upna (SPIE, 2016)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We report on the effects of large pump pulse powers on Brillouin optical time-domain analysis (BOTDA) sensors based on phase-modulated probe wave and coherent detection. It is found that the large Brillouin gain that comes ...
    • Gain dependence of the phase-shift spectra measured in coherent Brillouin optical time-domain analysis sensors 

      Mariñelarena Ollacarizqueta, Jon Upna; Urricelqui Polvorinos, Javier Upna; Loayssa Lara, Alayn Upna (IEEE, 2016)   Artículo / Artikulua  OpenAccess
      We report on the effects of large pump pulse powers on Brillouin optical time-domain analysis (BOTDA) sensors based on phase-modulated probe wave and coherent self-heterodyne detection. These sensors are particularly ...
    • Investigation on the working point of slope-assisted dynamic Brillouin distributed fiber sensing 

      Feng, Cheng; Mariñelarena Ollacarizqueta, Jon Upna; Schneider, Thomas (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, an investigation on the working point of slope-assisted dynamic distributed Brillouin sensing is presented. A comparison has been carried out between the sensing performances achieved at the inflection point ...
    • Latest research on long-range Brillouin distributed sensing 

      Loayssa Lara, Alayn Upna; Urricelqui Polvorinos, Javier Upna; Iribas Pardo, Haritz Upna; Mariñelarena Ollacarizqueta, Jon Upna; Mompó Roselló, Juan José Upna (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We review the latest developments in long-range Brillouin optical time-domain analysis sensors. The factors that impair the performance of these sensors, particularly in terms of their distance range, are discussed together ...
    • Non-local effects in Brillouin optical time-domain analysis sensors 

      Iribas Pardo, Haritz Upna; Urricelqui Polvorinos, Javier Upna; Mompó Roselló, Juan José Upna; Mariñelarena Ollacarizqueta, Jon Upna; Loayssa Lara, Alayn Upna (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      Brillouin optical time-domain analysis (BOTDA) sensors have great potential to provide distributed measurements of temperature and strain over large structures with high spatial resolution and measurement precision. However, ...
    • Phasorial DPP-BOTDA sensor tolerant to non-local effects 

      Urricelqui Polvorinos, Javier Upna; Mariñelarena Ollacarizqueta, Jon Upna; Sagüés García, Mikel Upna; Loayssa Lara, Alayn Upna (SPIE, 2014)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We introduce a modification of the differential pulse width pair technique in a BOTDA sensor based on a phase modulated probe wave and RF demodulation. This provides a differential Brillouin phasorial signal with high ...
    • Pulse coding linearization for Brillouin optical time-domain analysis sensors 

      Mariñelarena Ollacarizqueta, Jon Upna; Iribas Pardo, Haritz Upna; Loayssa Lara, Alayn Upna (Optical Society of America, 2018)   Artículo / Artikulua  OpenAccess
      We introduce a simple method to extend the performance of pulse coding techniques in their application to Brillouin optical time-domain analysis sensors (BOTDA). It is based on applying a simple logarithmic processing on ...
    • Simplified Brillouin sensor for structural health monitoring applications based on passive optical filtering 

      Iribas Pardo, Haritz Upna; Urricelqui Polvorinos, Javier Upna; Mariñelarena Ollacarizqueta, Jon Upna; Sagüés García, Mikel Upna; Loayssa Lara, Alayn Upna (SPIE, 2015)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We present a simplified configuration for distributed Brillouin optical time domain analysis sensors. The technique is based on passive optical filtering of the spectral components generated in an RF-pulse-modulated optical ...
    • Structural health monitoring of solar trackers using distributed fiber optic sensors 

      Mariñelarena Ollacarizqueta, Jon Upna; Mompó Roselló, Juan José Upna; Zurita Gabasa, Jesús Upna; Urricelqui Polvorinos, Javier Upna; Júdez Colorado, Aitor Upna; López-Amo Sáinz, Manuel Upna; Jiménez Romero, Sergio; Achaerandio, Álvaro; Loayssa Lara, Alayn Upna (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We demonstrate the application of a novel type of distributed fiber optic sensors (DFOSs) to dynamically monitor the effects of wind on solar tracker structures used in photovoltaic power stations. This DFOS is based on ...
    • Zuntz optikoan oinarritutako sentsoreen prestazioen muga-efektu berria, egituren egoera monitorizatzea helburu 

      Iribas Pardo, Haritz Upna; Mariñelarena Ollacarizqueta, Jon Upna; Loayssa Lara, Alayn Upna (Udako Euskal Unibertsitatea, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Brillouin denbora-eremu optikoaren analisian (BOTDA) oinarritutako sentsoreak estruktura handien (120 km luzerako estrukturak) deformazioa eta tenperatura neurtzeko gaitasuna dute, metro bateko bereizmen espazialarekin. ...