Sensor de impacto de baja energía basado en un interferómetro supermodal y una red de Bragg
- Monserrat Alonso-Murias 1
- David Monzón-Hernández 1
- Joseba Zubia 2
- Joel Villatoro 2
- 1 Centro de Investigaciones en Óptica A. C. León, Gto. México
- 2 Department of Communications Engineering, University of the Basque Country UPV/EHU, Bilbao, Spain
- Carballar Rincón, Alejandro (coord.)
- María del Rosario Fernández Ruiz (coord.)
Editorial: Editorial Universidad de Sevilla ; Editorial de la Universidad de Sevilla
Any de publicació: 2024
Tipus: Capítol de llibre
Resum
An impact sensor based on supermodal interference and Bragg grating is proposed and demonstrated. The sensor is composed by a short segment of coupled-core optical fiber spliced to single mode fiber in which a 5 mm-long Bragg grating was inscribed. To monitor impacts, the sensor was fixed on a cantilever-shaped piece secured on a platform. Then, different steel balls with known weight were dropped from various heights to the cantilever. The impact of the steel balls on the cantilever produced a rapid change (MHz) in the relative reflection of the Bragg grating, which was monitored with fast photodetector and an oscilloscope. The device here proposed could detect impacts in the range of 0.1 mJ to 8.3 mJ, but such a range can be extended with a proper sensor packaging.