Opto-mechanical lab-on-fibre seismic sensors detected the Norcia earthquake.

ABSTRACT: We have designed and developed lab-on-fibre seismic sensors containing a micro-opto-mechanical cavity on the fibre tip. The mechanical cavity is designed as a double cantilever suspended on the fibre end facet and connected to a proof mass to tune its response. Ground acceleration leads to displacement of the cavity length, which in turn can be remotely detected using an interferometric interrogation technique. After the sensors characterization, an experimental validation was conducted at the Italian National Institute of Geophysics and Volcanology (INGV), which is responsible for seismic surveillance over the Italian country. The fabricated sensors have been continuously used for long periods to demonstrate their effectiveness as seismic accelerometer sensors. During the tests, fibre opt

SUBMITTER: Pisco M 

PROVIDER: S-EPMC5923338 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature