[TuC1] FBG and SDM Sensors

[TuC1-4] High Sensitivity Curvature Sensor Based on Seven Core Fiber

Shandong Dong^1,2, 〇Fengze Tan³, Bo Dong⁴, Changyuan Yu³, Yongxin Guo^1,2 (¹National Univ. of Singapore, Singapore, ²National Univ. of Singapore (Suzhou) Research Institute, China, ³Hong Kong Polytechnic Univ., Hong Kong, ⁴Xi'an Institute of Optics and Precision Mechanicsd, China)

Keywords:Fiber sensing, Seven core fiber, Modal interferometer, Curvature

This paper presents a structure of single-mode fiber (SMF)-seven-core-fiber (SCF)-SMF, with a core-offset in one splicing point. Its maximum curvature sensitivity reaches 33.4363 nm/m^-1, within the measurement range of 0.86 m^-1-1.21 m^-1.