@article{fae48252d51445b5abff5abcb0b0dc48,
title = "Two interrogated FBG spectral linewidth for strain sensing through correlation",
abstract = "The spectral linewidth from two cross-correlated fiber Bragg gratings (FBGs) are interrogated and characterized using a delayed self-homodyne method for fiber strain sensing. This approach employs a common higher frequency resolution instead of wavelength. A sensitivity and resolution of 166 MHz/με and 50 nε were demonstrated from 4 GHz spectral linewidth characterization on the electric spectrum analyzer. A 10 nε higher resolution can be expected through random noise analyses when the spectral linewidth from two FBG correlations is reduced to 1 GHz. Moreover, the FBG spectrum is broadened during strain and experimentally shows a 0.44 pm/με sensitivity, which is mainly caused by the photo elastic effect from the fiber grating period stretch.",
keywords = "Correlation, Fiber bragg gratings, Fiber optics sensors, Remote sensing and sensors, Spectral linewidth",
author = "Hsu, {Shih Hsiang} and Chuang, {Kuo Wei} and Chen, {Ci Syu} and Lin, {Ching Yu} and Chang, {Che Chang}",
note = "Funding Information: Acknowledgments: The authors would like to thank S.-L. Lee for the lending of 40 GB/s photonics detector Ja.n-Cd. HJ.-.Ca.nHd. Can.-dY .TC..-fYor.Tc.h faorra cchtearriazcatteiorinzaotniotnh eonfi btehre sftirbaeirn ssternaisnit isveintysitthivriotyugthhrBoruagghg Bwraavgeglewnagvthelsehnigftt.hT shhiisftp. aTpheisr paper was supported by the Joint Research Program from National Taiwan University of Science and Technology and Taipei Medical University under the contract TMU-NTUST-105-05. Author Contributions: The contributions from S.-H.H. encompassed the collaboration with senior researchers, Author Contributions: The contributions from S.-H.H. encompassed the collaboration with senior researchers, C.-C.C., and C.-Y.L. as well as main technology developments, which include design, processing, and testing. iCn.-bCio.Cp.h oatnodnicCs..-KY.-.LW. .Cw. earned Cin.v-So.Clv.ewderweimthainthlye foocputiscinalg opnhathsee crhealaratecdteritzeacthionnoliomgpy,roevsepmeecniatlloyn tdhierepcrteincigsioitns, applications in biophotonics. K.-W.C. and C.-S.C. were mainly focusing on the characterization improvement Conflicts of Interest: The authors declare no conflict of interest. Publisher Copyright: {\textcopyright} 2017 by the authors. Licensee MDPI, Basel, Switzerland.",
year = "2017",
month = dec,
day = "7",
doi = "10.3390/s17122837",
language = "English",
volume = "17",
journal = "Sensors (Switzerland)",
issn = "1424-8220",
publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",
number = "12",
}