Open AccessShort-cavity multimode fiber-tip Fabry-Pérot sensors
Author(s) -
Xuan Wu,
Olav Solgaard
Publication year - 2013
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.21.014487
Subject(s) - multi mode optical fiber , optics , fabry–pérot interferometer , fiber optic sensor , interferometry , modal , fiber , optical fiber , polarization maintaining optical fiber , phase noise , signal (programming language) , noise (video) , graded index fiber , materials science , acoustics , physics , computer science , wavelength , image (mathematics) , artificial intelligence , polymer chemistry , composite material , programming language
We make the case for minimizing cavity length of extrinsic Fabry-Pérot (FP) cavities for use in fiber-tip sensors. Doing so mitigates multiple challenges that arise from using multimode fibers: mode averaging, phase uncertainty, amplitude reduction, and spectral modal noise. We explore these effects in detail using modal simulations, and construct pressure sensors based on this principle. We discuss the multimodal effects that we observe in our fiber sensors, and use simple filtering of the spectral signal to more easily measure pressure sensitivity. The concept of short-cavity FP interferometry is important for ensuring high quality and performance of multimode fiber sensors.