This review provides a comprehensive overview of FBG sensor technology, focusing on their operating principles, key advantages such as high sensitivity and immunity to electromagnetic interference, and common challenges like temperature-strain cross-sensitivity and the high cost of. This review provides a comprehensive overview of FBG sensor technology, focusing on their operating principles, key advantages such as high sensitivity and immunity to electromagnetic interference, and common challenges like temperature-strain cross-sensitivity and the high cost of. This page describes the structure, working operation, advantages, and disadvantages of a Fiber Bragg Grating (FBG) Sensor. Fiber optic sensors work by modulating one or more properties of the light wave, such as intensity, phase, polarization, and frequency. An optical fiber typically consists of a. Fiber Bragg grating (FBG) sensors have emerged as advanced tools for monitoring a wide range of physical parameters in various fields, including structural health, aerospace, biochemical, and environmental applications. In this article, we will explore the definition, historical background, and importance of FBGs in modern optics. The distance between the reflection points. What are the advantages and disadvantages of using fiber Bragg gratings (FBGs) for temperature sensing? What are FBGs? How do FBGs work for temperature sensing? What are the advantages of FBGs for temperature sensing? What are the disadvantages of FBGs for temperature sensing? Fiber optic sensors. Fibre Bragg Grating (FBG) sensors are now a revolutionary technology in the optical sensing area, recognized for their high sensitivity, immunity to electromagnetic interference, and reliability of operation in demanding environments. The present review paper provides an in-depth analysis of FBG.