Zuntz optikoan oinarritutako sentsoreen prestazioen muga-efektu berria, egituren egoera monitorizatzea helburu
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Abstract
Brillouin denbora-eremu optikoaren analisian (BOTDA) oinarritutako sentsoreak estruktura handien(120 km luzerako estrukturak) deformazioa eta tenperatura neurtzeko gaitasuna dute, metro batekobereizmen espazialarekin. Lan honetan, sentsorearen merkatu-prezioa handitu gabe bereizmen espazialtxikiagoa lortzeko beharrezkoa litzatekeen teknika erabiltzeak dituen efektu kaltegarriak aztertu egindira. Izan ere, pultsu azkar bat sortzeko beharrezkoak diren Mach-Zehnder modulagailu elektrooptikoekiraungitze-ratio (ER) txikia dute. Horiek horrela, aztertu egin da pultsatutako seinalea sortzeko sorgai-luak duen ERaren eragina BOTDA sentsoreen prestazioetan, akats handiak sortzen direla ondorioztatuz.
Distributed Brillouin optical time domain analysis (BOTDA) sensors can provide high precision dis-tributed measurements of the strain and temperature profile over extremely large structures (structuresof 120 km) with a meter spatial resolution. In this work, we present the detrimental effect that wouldimply the use of the necessary technique to achieve a lower spatial resolution, without increasingthe price of the sensor.Since the Mach-Zehnder electro-optical modulators that are required to per-form a fast pulse have a low extinction ratio (ER). Therefore, we have studied the consequences ofusing a pulse generator device with a low ER on BOTDA sensors, concluding that it generates large errors.
Distributed Brillouin optical time domain analysis (BOTDA) sensors can provide high precision dis-tributed measurements of the strain and temperature profile over extremely large structures (structuresof 120 km) with a meter spatial resolution. In this work, we present the detrimental effect that wouldimply the use of the necessary technique to achieve a lower spatial resolution, without increasingthe price of the sensor.Since the Mach-Zehnder electro-optical modulators that are required to per-form a fast pulse have a low extinction ratio (ER). Therefore, we have studied the consequences ofusing a pulse generator device with a low ER on BOTDA sensors, concluding that it generates large errors.
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Zuntz optikoko sentsoreak, Brillouin denbora-eremu optikoaren analisia (BOTDA)., Fiber optics sensors, Brillouin optical time domain analysis (BOTDA).