This work reviews the fiber‐optic sensors based on Bragg gratings, long period gratings, interferometers, surface plasmon resonance, fluorescence, and light diffusion. Fiber‐optic technology emerged originally for applications in data transmission and telecommunications. P 603 Radiation absorption excites an orbital electron to a higher energy level. Recent advancements focus on enhancing sensitivity and performance, especially in biomedical and environmental applications. Challenges remain in fabrication. Optical fiber sensors (OFSs) have emerged as essential tools in the monitoring of physical, chemical, and bio-medical parameters in harsh situations due to their high sensitivity, electromagnetic interference (EMI) immunity, and long-term stability. This article will explore the principles behind fiber optic current sensors.
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