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Enhanced tolerance to pulse extinction ratio in Brillouin optical time domain analysis sensors by dithering of the optical source
(SPIE, 2015)
Contribución a congreso / Biltzarrerako ekarpena,
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 ...
Simplified Brillouin sensor for structural health monitoring applications based on passive optical filtering
(SPIE, 2015)
Contribución a congreso / Biltzarrerako ekarpena,
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 ...
Egituren egoeraren monitorizaziorako zuntz optikoan oinarritutako sentsore sinplifikatua
(Udako Euskal Unibertsitatea, 2015)
Contribución a congreso / Biltzarrerako ekarpena,
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 ...
Mitigation of modulation instability in Brillouin distributed fiber sensors by using orthogonal polarization pulses
(SPIE, 2015)
Contribución a congreso / Biltzarrerako ekarpena,
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 ...
Phase-shift based BOTDA measurements tolerant to non-local effects
(SPIE, 2013)
Contribución a congreso / Biltzarrerako ekarpena,
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 ...
Overcoming non-local effects and Brillouin threshold limitations in Brillouin distributed sensors
(SPIE, 2015)
Contribución a congreso / Biltzarrerako ekarpena,
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 ...
Polarization diversity for Brillouin distributed fiber sensors based on a double orthogonal pump
(SPIE, 2014)
Contribución a congreso / Biltzarrerako ekarpena,
We demonstrate a novel Brillouin optical time domain analysis sensor deploying a polarization diversity technique which eliminates the need for polarization scrambling, providing measurements that are largely immune to the ...
Dynamic BOTDA measurements using Brillouin phase-shift
(SPIE, 2012)
Contribución a congreso / Biltzarrerako ekarpena,
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 ...
Brilloun optical time domain analysis sensor assisted by a Brillouin distributed amplifier
(SPIE, 2015)
Contribución a congreso / Biltzarrerako ekarpena,
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 ...
Phasorial DPP-BOTDA sensor tolerant to non-local effects
(SPIE, 2014)
Contribución a congreso / Biltzarrerako ekarpena,
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 ...