Negative curvature hollow core fiber-functionalized cascaded structure for curvature sensing

Xinsai Zhang; Qi Zhang; Yang Yu; Yang Wang; Zong Cao; Xiaobei Zhang; Tingyun Wang

doi:10.1117/12.2687611

27 November 2023 Negative curvature hollow core fiber-functionalized cascaded structure for curvature sensing

Xinsai Zhang, Qi Zhang, Yang Yu, Yang Wang, Zong Cao, Xiaobei Zhang, Tingyun Wang

Proceedings Volume 12771, Advanced Sensor Systems and Applications XIII; 127711P (2023) https://doi.org/10.1117/12.2687611
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Conference Poster

Abstract

We demonstrate a high-sensitivity curvature sensor based on the negative curvature hollow core fiber (NCHCF). The graded index fiber (GIF) is introduced between single mode fiber (SMF) and NCHCF for the sensor of cascaded structure of SMF-GIF-NCHCF-GIF-SMF. The coupling efficiency can be improved by cascading the GIF. The experimental results show that there are two coexisted mechanisms in the cascaded structure, where multi-mode interference (MMI) is sensitive to curvature change and anti-resonance (AR) is insensitive to curvature change. The obtained curvature sensitivity based on MMI is up to -4.97 nm/m-1 . With advantages of compactness, flexibility, high sensitivity and so on, the curvature sensor shows prospects in structural health monitoring, medical applications, energy exploration and other fields.

Citation Download Citation

Xinsai Zhang, Qi Zhang, Yang Yu, Yang Wang, Zong Cao, Xiaobei Zhang, and Tingyun Wang "Negative curvature hollow core fiber-functionalized cascaded structure for curvature sensing", Proc. SPIE 12771, Advanced Sensor Systems and Applications XIII, 127711P (27 November 2023); https://doi.org/10.1117/12.2687611

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