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Determination of physical location of fiber Bragg gratings using traversal heat‐induced phase shift
Author(s) -
Rodzi Noor Shafikah Md,
Mokhtar Mohd Ridzuan,
Yusoff Zulfadzli
Publication year - 2019
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31719
Subject(s) - fiber bragg grating , traverse , materials science , optics , phase (matter) , wavelength , phosfos , tree traversal , optical fiber , optoelectronics , fiber optic sensor , physics , plastic optical fiber , computer science , quantum mechanics , programming language , geodesy , geography
In certain application, the exact location of the grating structure of fiber Bragg grating (FBG) is crucial for properly packaging, altering or exploiting the device. This article proposes a simple way to determine the location of FBG by applying heat induced phase shift. A traversing thin heating element is continuously scanned across the FBG while the local optical spectral profile is analyzed. The experiments are performed on an apodised uniform FBG and a chirped FBG. The results show that the symmetry of the local spectral profiles and prominence of the phase‐induced spectral dip can be used to determine the structure center and exact physical location of the apodised FBG. Meanwhile, the location of the linearly chirped FBG can be determined by simply observing the wavelength of the spectral dip.