• BOTDA measurements tolerant to non-local effects by using a phase-modulated probe wave and RF demodulation 

      Urricelqui Polvorinos, Javier Upna; Sagüés García, Mikel Upna; Loayssa Lara, Alayn Upna (Optical Society of America, 2013)   Artículo / Artikulua  OpenAccess
      We demonstrate a Brillouin optical time domain analysis sensor based on a phase modulated probe wave and RF demodulation that provides measurements tolerant to frequency dependent variations of the pump pulse power induced ...
    • Brillouin distributed sensing assisted by Brillouin amplification of pump pulses 

      Urricelqui Polvorinos, Javier Upna; Sagüés García, Mikel Upna; Loayssa Lara, Alayn Upna (IEEE, 2014)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We demonstrate, for the first time to our knowledge, the extension of the measurement range of Brillouin distributed sensors (BDS) by using a distributed Brillouin amplifier (DBA) to compensate the attenuation of the ...
    • Brillouin optical time-domain analysis sensor assisted by Brillouin distributed amplification of pump pulses 

      Urricelqui Polvorinos, Javier Upna; Sagüés García, Mikel Upna; Loayssa Lara, Alayn Upna (Optical Society of America, 2015)   Artículo / Artikulua  OpenAccess
      We demonstrate the extension of the measurement range of Brillouin optical time-domain analysis (BOTDA) sensors using a distributed Brillouin amplifier (DBA). The technique is based on injecting a DBA pump wave in the ...
    • Brillouin optical time-domain analysis sensor with amplification of pump pulses and tolerant to non-local effects 

      Mompó Roselló, Juan José Upna; Urricelqui Polvorinos, Javier Upna; Loayssa Lara, Alayn Upna (SPIE, 2016)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We demonstrate a simple technique to provide conventional Brillouin optical time-domain analysis sensor with compensation for pump pulse attenuation and tolerance to non-local effects. The technique is based on operating ...
    • Brillouin optical time-domain analysis sensor with pump pulse amplification 

      Mompó Roselló, Juan José Upna; Urricelqui Polvorinos, Javier Upna; Loayssa Lara, Alayn Upna (Optical Society of America, 2016)   Artículo / Artikulua  OpenAccess
      We demonstrate a simple technique to provide conventional Brillouin optical time-domain analysis sensors with mitigation for pump pulse attenuation. The technique is based on operating the sensor in loss configuration so ...
    • Brilloun optical time domain analysis sensor assisted by a Brillouin distributed amplifier 

      Urricelqui Polvorinos, Javier Upna; Sagüés García, Mikel Upna; Loayssa Lara, Alayn Upna (SPIE, 2015)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We demonstrate the extension of the measurement range of Brillouin optical time-domain analysis (BOTDA) sensors using a distributed Brillouin amplifier (DBA). The technique is based on injecting a DBA pump wave in the ...
    • Contribution to the development of Brillouin optical time-domain analysis sensors 

      Urricelqui Polvorinos, Javier Upna (2016)   Tesis doctoral / Doktoretza tesia  OpenAccess
      This thesis dissertation concentrates on solving some of the limitations described by proposing novel techniques. The first technique is based on using a phase-modulated probe wave with self-heteroyne detection and RF ...
    • 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 ...
    • Dynamic BOTDA measurements based on Brillouin phase-shift and RF demodulation 

      Urricelqui Polvorinos, Javier Upna; Zornoza Indart, Ander; Sagüés García, Mikel Upna; Loayssa Lara, Alayn Upna (Optical Society of America, 2012)   Artículo / Artikulua  OpenAccess
      We demonstrate a novel dynamic BOTDA sensor based, for the first time to our knowledge, on the use of the Brillouin phase shift in addition to the conventional Brillouin gain. This provides the advantage of measurements ...
    • Dynamic BOTDA measurements using Brillouin phase-shift 

      Urricelqui Polvorinos, Javier Upna; Zornoza Indart, Ander; Sagüés García, Mikel Upna; Loayssa Lara, Alayn Upna (SPIE, 2012)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We demonstrate a novel dynamic BOTDA sensor based, for the first time to our knowledge, on the use of the Brillouin phase-shift instead of the conventional Brillouin gain. This provides the advantage of measurements that ...
    • 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 ...
    • Enhanced tolerance to pulse extinction ratio in Brillouin optical time domain analysis sensors by dithering of the optical source 

      Iribas Pardo, Haritz Upna; Urricelqui Polvorinos, Javier Upna; Sagüés García, Mikel Upna; Loayssa Lara, Alayn Upna (SPIE, 2015)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We demonstrate the relaxation of the stringent requirements placed on the pulse extinction ratio in long-range Brillouin optical time-domain analysis sensors (BOTDA) by modulating the wavelength of the laser source that ...
    • 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 ...
    • Mitigation of modulation instability in Brillouin distributed fiber sensors by using orthogonal polarization pulses 

      Urricelqui Polvorinos, Javier Upna; Alem, Mehdi; Sagüés García, Mikel Upna; Thévenaz, Luc; Loayssa Lara, Alayn Upna; Soto, Marcelo A. (SPIE, 2015)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A technique based on the use of orthogonally-polarized pulses is proposed to mitigate the detrimental impact of modulation instability on Brillouin distributed fiber sensors. While the theoretical underpinnings of the ...
    • 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, ...
    • Overcoming non-local effects and Brillouin threshold limitations in Brillouin distributed sensors 

      Urricelqui Polvorinos, Javier Upna; Ruiz Lombera, Rubén; Sagüés García, Mikel Upna; Mirapeix, Jesús; López Higuera, José Miguel; Loayssa Lara, Alayn Upna (SPIE, 2015)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We demonstrate, for the first time to our knowledge, a Brillouin optical time domain analysis sensor that is able to operate with a probe power larger than the Brillouin threshold of the deployed sensing fiber and that ...
    • Overcoming non-local effects and Brillouin threshold limitations in Brillouin optical time domain sensors 

      Ruiz Lombera, Rubén; Urricelqui Polvorinos, Javier Upna; Sagüés García, Mikel Upna; Mirapeix, Jesús; López Higuera, José Miguel; Loayssa Lara, Alayn Upna (IEEE, 2015)   Artículo / Artikulua  OpenAccess
      We demonstrate, for the first time to our knowledge, a Brillouin optical time domain analysis (BOTDA) sensor that is able to operate with a probe power larger than the Brillouin threshold of the deployed sensing fiber ...
    • Phase-shift based BOTDA measurements tolerant to non-local effects 

      Urricelqui Polvorinos, Javier Upna; Sagüés García, Mikel Upna; Loayssa Lara, Alayn Upna (SPIE, 2013)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We demonstrate a BOTDA sensor based on the use of the Brillouin phase shift that performs measurements tolerant to non local effects. This technique raises opportunities to increase the distance covered by these sensors ...
    • Phasorial differential pulse-width pair technique for long-range Brillouin optical time-domain analysis sensors 

      Urricelqui Polvorinos, Javier Upna; Sagüés García, Mikel Upna; Loayssa Lara, Alayn Upna (Optical Society of America, 2014)   Artículo / Artikulua  OpenAccess
      We introduce a novel phasorial differential pulse width pair (PDPP) method for Brillouin optical time domain analysis (BOTDA) sensors that combines spatial resolution enhancement with increased tolerance to non local ...