Comparative study of coupling to symmetric and antisymmetric cladding modes in long-period fiber gratings

We analyse the influence of coupling to symmetric and antisymmetric cladding modes in arc-induced Long-Period Fiber Gratings for temperature and strain sensing. The origin of this difference in energy coupling is related to the fabrication process of these gratings and depends on the electric arc di...

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Bibliographic Details
Published in:Journal of modern optics 2019-07, Vol.66 (12), p.1369-1374
Main Authors: Delgado, Felipe, Bessa, Alexandre
Format: Article
Language:English
Subjects:
Cladding
Comparative studies
Coupling
Electric arcs
Fabrication
fiber-optics
Gratings (spectra)
long-period fiber grating
Optical fibers
Optical sensor
Refractivity
Temperature
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Summary:We analyse the influence of coupling to symmetric and antisymmetric cladding modes in arc-induced Long-Period Fiber Gratings for temperature and strain sensing. The origin of this difference in energy coupling is related to the fabrication process of these gratings and depends on the electric arc discharge conditions, which modulates the refractive index and geometry of the optical fiber. Finally, results demonstrate the performance of different cladding modes excited in arc-induced LPFGs to temperature and strain applications and, in addition, indicate which coupling might be appropriate to certain sensing applications.
ISSN:0950-0340
1362-3044
DOI:10.1080/09500340.2019.1619853