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Sensors 2016, 16(9), 1473; doi:10.3390/s16091473

Orientation-Dependent Displacement Sensor Using an Inner Cladding Fiber Bragg Grating

Physics Department, Northwest University, Xi’an 710069, China
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Authors to whom correspondence should be addressed.
Received: 18 July 2016 / Accepted: 8 September 2016 / Published: 11 September 2016
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Abstract

An orientation-dependent displacement sensor based on grating inscription over a fiber core and inner cladding has been demonstrated. The device comprises a short piece of multi-cladding fiber sandwiched between two standard single-mode fibers (SMFs). The grating structure is fabricated by a femtosecond laser side-illumination technique. Two well-defined resonances are achieved by the downstream both core and cladding fiber Bragg gratings (FBGs). The cladding resonance presents fiber bending dependence, together with a strong orientation dependence because of asymmetrical distribution of the “cladding” FBG along the fiber cross-section. View Full-Text
Keywords: inner cladding-FBG inscription; femtosecond laser; orientation bending inner cladding-FBG inscription; femtosecond laser; orientation bending
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Yang, T.; Qiao, X.; Rong, Q.; Bao, W. Orientation-Dependent Displacement Sensor Using an Inner Cladding Fiber Bragg Grating. Sensors 2016, 16, 1473.

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