Highly sensitive curvature sensor based on single-mode fiber using core-offset splicing

摘要

A highly sensitive curvature sensor based on core-offset splicing is proposed and demonstrated. The whole fabrication process is quite simple and the sensor head is cost effective. Measurement results show that it has a high sensitivity of -22.947 nm/m~(-1) in the range from 0.35312 m~(_1) to 2.8127 m~(-1). Temperature sensitivity of 77.6 pm/°C within the range of 20-80 °C has also been achieved, which implies the possibility for measurement of temperature. High sensitivity and low-cost make it a preferable candidate for small curvature sensing with high resolution in practical applications.