Twin-core fiber sensor integrated in laser cavity
Abstract
In this work, we report on a twin-core fiber sensor system that provides improved spectral efficiency, allows for multiplexing and gives low level of crosstalk. Pieces of the referred strongly coupled multicore fiber are used as sensors in a laser cavity incorporating a pulsed semiconductor optical amplifier (SOA). Each sensor has its unique cavity length and can be addressed individually by electrically matching the periodic gating of the SOA to the sensor’s cavity roundtrip time. The interrogator acts as a laser and provides a narrow spectrum with high signal-to-noise ratio. Furthermore, it allows distinguishing the response of individual sensors even in the case of overlapping spectra. Potentially, the number of interrogated sensors can be increased significantly, which is an appealing feature for multipoint sensing.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 12, 2022
- Source ID
- 10.1038/s41598-022-16103-8
Entities
People
- Angel Ortega-gomez
- Carolina Franciscangelis
- Gaizka Durana
- Joel Villatoro
- Joseba Zubia
- Josu Amorebieta
- João M. B. Pereira
- Walter Margulis
Organizations
- Basque Government
- European Regional Development Fund
- Formas
- Ministry of Economy, Industry and Competitiveness
- Ministry of Science of Spain
- Office of Naval Research Global
- University of the Basque Country