High sensitivity sapphire FBG temperature sensors for the signal processing of data communications technology

Abstract

<p>This study has outlined the fiber bragg grating (FBG) temperature sensors signal processing for data communications by using OptiGrating simulation software. The reflectivity of the silica and sapphire fiber grating spectrum is reported against the grating wavelength for internal and external temperature variations. As well as apodized Gaussian reflectivity of the silica and sapphire fiber grating spectrum is simulated and clarified against the grating wavelength for high temperature variations. The temperature sensitivity of sapphire FBG nearly 0.11 pm/<sup>0</sup>C, where its value is three times higher than silica FBG. It is observed that silica and Sapphire FBG sensors were tested up to 1000 <sup>0</sup>C by using Gaussian apodization type, side lobes in reflectivity spectrum are totally suppressed.</p>

A Review of Optical Fiber Sensing Technology Based on Thin Film and Fabry–Perot Cavity

“…However, existing electronic temperature sensors are difficult to use in the presence of strong electromagnetic fields. In contrast, optical fibers can overcome this interference, as demonstrated by temperature sensors based on FBG [136,137], WGM [138,139], MZI [140,141], and Michelson interferometry [142,143]. This section will focus on the recent achievements of fiber FP devices based on different thin films for temperature sensing.…”

Performance comparison of TOPAS chirped fiber Bragg grating sensor with Tanh and Gaussian apodization

“…Cubicroot-CFBG and the last type is cubicroot-CFBG, the distance between the gratings in the FBG core is defined as in (6). For cubicroot-CFBG has a lattice along the core which is arranged according to the cubic root function.…”

“…This has happened since the demonstration of photon-induced refractive index modulation in the last three decades. FBG sensor grating has different shapes and is used in various fields such as the oil and gas industry [2], aviation [3], medical [4], strain sensing [5], and temperature [6], [7], and monitoring in nuclear plants [8]. In general, FBG is sensitive to changes in physical parameters such as strain and temperature independently, which we cannot separate the effects of the two quantities normally, but requires special measures, as well as simultaneous temperature and strain sensing.…”