Publication :
Tunable distributed sensing performance in Ca-based nanoparticle-doped optical fibers

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Date
2022-03-04
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Direction de recherche
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OSA Pub.
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Résumé
Rayleigh scattering enhanced nanoparticle-doped optical fibers is a technology very promising for distributed sensing applications, however, it remains largely unexplored. This work demonstrates for the first time the possibility of tuning Rayleigh scattering and optical losses in Ca-based nanoparticle-doped silica optical fibers by controlling the kinetics of the re-nucleation process that nanoparticles undergo during fiber drawing by controlling preform feed, drawing speed and temperature. A 3D study by SEM, FIB-SEM and optical backscatter reflectometry (OBR) reveals an early-time kinetics at 1870 °C, with tunable Rayleigh scattering enhancement 43.2–47.4 dB, regarding a long-haul single mode fiber, SMF-28, and associated sensing lengths of 3–5.5 m. At 2065 °C, kinetics is slower and nanoparticle dissolution is favored. Consequently, enhanced scattering values of 24.9–26.9 dB/m and sensing lengths of 135–250 m are attained. Finally, thermal stability above 500 °C and tunable distributed temperature sensitivity are proved, from 18.6 pm/°C to 23.9 pm/°C, ∼1.9–2.4 times larger than in a SMF-28. These results show the promising future of Rayleigh scattering enhanced nanoparticle-doped optical fibers for distributed sensing.
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Revue
Optical materials express, Vol. 12 (4), 1323-1336 (2022)
DOI
10.1364/OME.451311
URL vers la version publiée
Mots-clés
Distributed optical fiber sensor , Nanoparticle-doped optical fiber , Enhanced Rayleigh backscattering optical fiber , Optical backscatter reflectometry , Tunable temperature sensitivity
Citation
Type de document
article de recherche