多路复用
栅栏
光学
偏移量(计算机科学)
材料科学
波长
波分复用
光纤
光纤布拉格光栅
光纤传感器
计算机科学
物理
电信
程序设计语言
作者
Yanjie Meng,Shuai Xiao,Rongyi Shan,Wenfa Liang,Huajian Zhong,Yuhao Kong,Zhenwei Peng,Cailing Fu,Changrui Liao,Z. Zhang,Yiping Wang
出处
期刊:Optics Letters
[Optica Publishing Group]
日期:2024-07-03
卷期号:49 (15): 4146-4146
被引量:1
摘要
Limited by the multiplexing number of fiber Bragg grating (FBG), further improvement in the length of 3D shape sensing based on FBG technology is challenging. In this Letter, a wavelength-division and space-division multiplexing multicore fiber grating method is proposed, which extends the sensing length. Employing the femtosecond-laser point-by-point technology, we inscribed WDM grating arrays in six outer cores of a seven-core fiber, respectively. Three cores were utilized as a segment for shape sensing, and two such segments were offset by a specific length and combined to form a shape sensor. Utilizing an FBG interrogator, the proposed shape sensor achieved 2D and 3D shape sensing at a length of 967 mm and effectively mitigated the effects of temperature variations. In experiments, maximum shape reconstruction errors per unit lengths are 1.89%, 2.72%, and 1.47% for 2D shape, 3D shape, and an arbitrary shape under variable temperature conditions, respectively. The proposed method holds promise for further extending the shape sensing length by utilizing multicore fibers or fiber clusters containing more cores.
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