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DOI码：10.1016/j.optcom.2025.131679

发表刊物：Optics Communications

关键字：Femtosecond laser Accelerometer Cladding waveguide fiber Bragg gratings

摘要：This paper presents a cladding waveguide fiber Bragg gratings (CWFBGs) two-dimensional (2D) vector accelerometer in a standard single-mode fiber. The cladding waveguides with large eccentricity are inscribed using the femtosecond laser direct writing technique with a multiple-scan method. Subsequently, FBGs are inscribed into cladding straight waveguides. Experiments were conducted to monitor the variation of the central wavelength of the CWFBGs in response to bending and vibration. The results show that the maximum bending sensitivity is 67.38 pm/m−1 and the maximum acceleration sensitivity is 37.78 pm/g at an offset distance of 45 μm. According to the method described above, orthogonal CWFBGs are inscribed at the same position in the single-mode fiber, which overcomes the limitations of the geometry of multi-core fiber (MCF), achieving higher sensitivity than MCF under the same conditions. Additionally, the demodulation of multiple channels does not require a fan-in/fan-out device, reducing the cost of sensing. The findings of this study illustrate that CWFBGs offer highly sensitive 2D vector vibration measurement in a compact form factor, thus holding promising applications in miniaturized vector fiber sensing.

论文类型：期刊论文

论文编号：131679

学科门类：理学

一级学科：光学

文献类型：J

卷号：583

ISSN号：00304018

是否译文：否

收录刊物：SCI

发布期刊链接：https://linkinghub.elsevier.com/retrieve/pii/S003040182500207X

第一作者：Rongsheng Liu , Pengtao Luo , Xingyong Li, Fengyi Chen , Rui Zhou∗, Xueguang Qiao