Abstract

Multi core fiber (MCF)-based shape sensing has emerged as a promising technology for real time, three dimensional reconstruction of complex structures. By integrating multiple light guiding cores within a single cladding, MCF sensors enable simultaneous measurement of curvature, twist, and strain, providing superior spatial resolution and robustness compared with traditional single core configurations. This review summarizes recent progress in MCF design, interrogation techniques, and reconstruction algorithms, and discusses current challenges and future development trends toward high precision, miniaturized, and intelligent sensing systems for medical, robotic, and structural applications.

Keywords:Multi core fiber; Shape sensing; Distributed sensing; Curvature sensing