Coupled  π ‐shifted fibre Bragg grating ring resonant strain sensors | Zendy

Campanella C.E. | Zendy

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Coupled π ‐shifted fibre Bragg grating ring resonant strain sensors

Author(s) -

Campanella C.E.

Publication year - 2016

Publication title -

electronics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.375

H-Index - 146

eISSN - 1350-911X

pISSN - 0013-5194

DOI - 10.1049/el.2016.2526

Subject(s) - fiber bragg grating , materials science , resonator , optics , grating , resonance (particle physics) , reflection (computer programming) , coupled mode theory , strain (injury) , optoelectronics , refractive index , physics , wavelength , atomic physics , medicine , computer science , programming language

Resonant optical strain sensors, obtained by closing in loop coupled π ‐shifted Bragg gratings ( π ‐FBGs), are reported. Despite of a conventional π ‐FBG, showing a transmission Lorentzian resonance in the reflection band, the coupled π ‐shifted Bragg grating structure is characterised by a spectral response formed by a split doublet of the primary transmission Lorentzian mode of π ‐FBG. By closing in loop this structure, the coupled π ‐shifted Bragg grating ring resonators show better performance than π ‐shifted Bragg grating ring resonators in terms of strain sensitivity (i.e. 2.86 pm/με) is demonstrated. Thus, the coupled π ‐FBGRR is suitable for enhanced sensitivity strain sensing applications.

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