AUTHOR=Fernández-Ruiz María R. , Soriano-Amat Miguel , Martins Hugo F. , Durán Vicente , Martin-Lopez Sonia , Gonzalez-Herraez Miguel 

TITLE=High Resolution Distributed Optical Fiber Sensing Using Time-Expanded Phase-Sensitive Reflectometry

JOURNAL=Frontiers in Sensors

VOLUME=2

YEAR=2022

URL=https://www.frontiersin.org/journals/sensors/articles/10.3389/fsens.2021.804556

DOI=10.3389/fsens.2021.804556

ISSN=2673-5067

ABSTRACT=<p>We have demonstrated a novel scheme for distributed optical fiber sensing based on the use of a dual frequency comb, which enables the development of a high-resolution (in the cm range) distributed sensor with significantly relaxed electronic requirements compared with previous schemes. This approach offers a promising solution for real time structure monitoring in a variety of fields, including transportation, manufacturing or mechatronics. In this work, we review the principle of operation of the technique, recent advances to improve its performance and different experimental tests.</p>