Selective fiber Bragg grating inscription in four-core fiber for two-dimension vector bending sensing

Abstract

The paper presents selective fiber Bragg grating (FBG) inscription in four-core fiber based on a phase mask scanning method. The inscription factors are systematically investigated, which involves fiber core position and focused laser beam size in fiber, etc. Several specific inscriptions (including individual, dual and all inscriptions) are demonstrated. Two orthogonally positioned cores are selectively inscribed and applied to two-dimension vector bending measurement. The measured bending sensitivities of two FBGs range from −54.3 pm/m−1 to 52.2 pm/m−1 and −53.7 pm/m−1 to 52.8 pm/m−1, respectively. More importantly, it has been revealed that their sensitivities versus bending direction follow regular cosinoidal and sinusoidal distribution. The direction and amplitude of the vector bending can be recovered using measured central wavelength shifts of those two FBGs.

Publication DOI: https://doi.org/10.1364/OE.398794
Divisions: College of Engineering & Physical Sciences > School of Informatics and Digital Engineering > Electrical and Electronic Engineering
Additional Information: © 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Uncontrolled Keywords: Atomic and Molecular Physics, and Optics
Publication ISSN: 1094-4087
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.osa ... =oe-28-18-26461 (Publisher URL)
PURE Output Type: Article
Published Date: 2020-08-24
Accepted Date: 2020-08-10
Authors: Bao, Weijia
Sahoo, Namita
Sun, Zhongyuan
Wang, Changle
Liu, Shen
Wang, Yiping
Zhang, Lin

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