Fibre optic sensors work by transmitting light through the glass core of a cable, travelling by reflecting off the casing. This information is then turned from light into electrical signals at the end by processors. Fiber optic sensors, known for detecting minute disturbances, offering long-range capabilities, and resisting electromagnetic interference, play a key role in modern perimeter security. Think of it like a photoresistor, which changes its resistance based. Jose Miguel Lopez-Higuera: Handbook of Optical Fiber Sensing Technology, John Wiley & Sons, 2002. Fibers have many uses in remote sensing. Depending on the. birth of fiber optic sensors.