Fiber Optic Sensing (FOS) has transformed the landscape of monitoring and diagnostics. Far beyond its origins in telecommunications, FOS now provides critical data across sectors, from safeguarding infrastructure to advancing environmental conservation. In 2023, researchers turned submarine cables into earthquake warning systems and gave electric vehicles “optical nerves” to prevent battery failures. From energy. Jose Miguel Lopez-Higuera: Handbook of Optical Fiber Sensing Technology, John Wiley & Sons, 2002. Radiation absorption creates electronic excited states that are trapped by localized defects for extended periods of. Fiber optic sensors use optical fibers as the sensing medium to measure a wide range of physical properties such as temperature, pressure, strain, and chemical composition.