Temperature-insensitive 2D tilt sensor with three fiber Bragg gratings

摘要

A two-dimensional (2D) tilt sensor based on three optical fiber Bragg gratings (FBGs) is proposed and demonstrated. Experimental results show that a high measurement sensitivity of 192 pm/deg and resolution of 0.005 deg can be achieved and the measurement is insensitive to temperature. Furthermore, the FBGs were subjected to the force directly without any force transmission, which ensures a high measurement accuracy of 0.1 deg.