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Updated: Jan 26, 2026

Writing Bragg Gratings in Multicore Fibers
Published on: April 20, 2016
On-line Writing of Fiber Bragg Grating Array on a Two-mode Optical Fiber for Sensing Applications
Haihu Yu1, Wenjing Gao2, Xin Jiang3
1National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China. hhyu@whut.edu.cn.
Abstract:
On-line fabricated fiber Bragg grating (FBG) array and its sensing potentials have attracted plenty of attention in recent years. In this paper, FBG arrays are written on-line on a two-mode fiber, and this two-mode fiber Bragg grating (TM-FBG) is further experimentally investigated for temperature and curvature sensing. The responses of this sensor were characterized by 11.2 pm/°C and -0.21 dB/m-1 for temperature and curvature, respectively. Based on the measurements, a dual-parameter fiber sensing system was developed, which can realize the quasi-distributed, simultaneous detection of temperature and curvature, making it suitable for structural health monitoring or perimeter security.
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