Electromagnetic Immunity and Safety: Optical fibers do not conduct electricity, making them ideal for use in environments with high-voltage electricity, flammable materials, or other hazardous conditions, where traditional electrical sensors could pose risks or be affected by interference . High Sensitivity and Precision: Optical fibers can detect minute changes in physical parameters such as temperature, strain, pressure, displacement, and angular velocity by monitoring variations in light intensity, phase, wavelength, or polarization . This allows for highly accurate measurements in industrial, medical, and structural applications. Flexibility and Small Size: Optical fibers are thin, lightweight, and flexible, enabling sensors to be installed in tight spaces, embedded in structures, or integrated into wearable devices . Resistance to Extreme Conditions: Optical fiber sensors can withstand high temperatures, high pressures, and corrosive environments, making them suitable for applications in chemical plants, petroleum industries, and aerospace . Distributed Sensing Capability: Intrinsic fiber-optic sensors can provide distributed measurements along the entire length of the fiber, allowing monitoring over long distances, such as pipelines, bridges, or power transmission lines . Multiplexing and Remote Sensing: Multiple sensors can be placed along a single fiber using wavelength or time-domain techniques, enabling efficient monitoring of large areas without the need for electrical power at each sensor location .
Optical fiber sensors are widely used in structural health monitoring, industrial process control, medical monitoring (e.g., heart rate, blood oxygen), environmental monitoring (e.g., water quality, air pollution), and transportation systems for real-time data collection and safety assurance . In summary, optical fibers are chosen for sensors because they combine safety, precision, flexibility, and robustness, making them highly versatile for both conventional and extreme sensing applications.
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