Fiber Optic Sensors Based on Light Intensity Changes: Environmental changes are measured by analyzing the intensity changes of light signals. Detection in Narrow Locations The small sensing section and flexible Fiber Unit cable enable a Fiber Sensor to. Fiber optic sensors are used in a wide range of fields, including: Structural Health Monitoring: Real-time monitoring of the physical condition of structures. Jose Miguel Lopez-Higuera: Handbook of Optical Fiber Sensing Technology, John Wiley & Sons, 2002. P 603 Radiation absorption excites an orbital electron to a higher energy level. Radiation absorption creates electronic excited states that are trapped by localized defects for extended periods of. Among the reasons why optical fibers are such an attractive are their low loss, high bandwidth, immunity to electromagnetic interference (EMI), small size, light weight, safety, relatively low cost, low maintenance, etc. These sensors mainly measure physical quantities, such as object displacement and pressure, by. Sensors come in a wide variety, and each type has strengths and weaknesses. What Is a Sensor? Learn all about the principles, structures, and features of eight sensor types according to their detection principles.