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Keywords = inner cladding-FBG inscription

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Article
Orientation-Dependent Displacement Sensor Using an Inner Cladding Fiber Bragg Grating
by Tingting Yang, Xueguang Qiao, Qiangzhou Rong and Weijia Bao
Sensors 2016, 16(9), 1473; https://doi.org/10.3390/s16091473 - 11 Sep 2016
Cited by 19 | Viewed by 5506
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 [...] Read more.
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. Full article
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