According to the different packaging technology of FBG, FBG sensors can be divided into tube-packaged, embedded packaging and surface-attached packaging. These three monitoring methods have their own characteristics and applicable conditions. In the context of SHM in the aircraft field, this article provides an overview of four aspects: classification and principles of fiber optic sensors, packaging forms of FBG sensors, bonding technology, and calibration technology. The light beam travels through the core by. Fiber optic-based sensing for non-destructive evaluation (NDE) and structural health monitoring of various infrastructure and energy assets is an increasingly important sensing scheme. It's a device that converts light rays into electronic signals. Think of it like a photoresistor, which.