Open AccessResonant fiber-optic strain and temperature sensor achieving thermal-noise-limit resolution
Author(s) -
Shuangxiang Zhao,
Qingwen Liu,
Jiageng Chen,
Zuyuan He
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.415611
Subject(s) - optics , noise (video) , interferometry , image resolution , fiber optic sensor , optical fiber , resolution (logic) , materials science , thermal , noise floor , acoustics , physics , noise measurement , noise reduction , computer science , artificial intelligence , meteorology , image (mathematics)
In the area of fiber-optic sensors (FOSs), the past decade witnessed great efforts to challenge the thermal-noise-level sensing resolution for passive FOS. Several attempts were reported claiming the arrival of thermal-noise-level resolution, while the realization of thermal-noise-level resolution for passive FOSs is still controversial and challenging. In this paper, an ultrahigh-resolution FOS system is presented with a sensing resolution better than existing high-resolution passive FOSs. A fiber Fabry-Perot interferometer as the sensing element is interrogated with an ultra-stable probe laser by using the Pound-Drever-Hall technique. Both strain and temperature measurements are carried out to validate the performance of the sensor. The measured noise floor agrees with the theoretical thermal noise level very well.