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

Weijia Bao, Namita Sahoo, Zhongyuan Sun, Changle Wang, Shen Liu*, Yiping Wang, Lin Zhang

*Corresponding author for this work

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)26461-26469
Number of pages9
JournalOptics Express
Volume28
Issue number18
DOIs
Publication statusPublished - 24 Aug 2020

Bibliographical note

© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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