Analysis of fiber Bragg grating array based multipoint sensor for monotonic temperature fields

Abstract

In this paper, fiber Bragg grating (FBG) array incorporating three FBGs in SMG-28 fiber with distinct centre wavelengths at 1545.01 nm, 1550.03 nm and 1555.03 nm has been investigated for multipoint sensing of monotonic temperature fields. The response and sensitivity of the commercially available FBG array is compared with OptiGrating 4.2.1 simulations. The findings can be used for optimizing the key parameters of FBG array sensor for cost effective and spectrally enhanced multipoint and distributed sensors.