An optical fiber sensing system is basically composed of a light source, optical fiber; a sensing element or transducer and a detector (see Fig. Radiation absorption excites an orbital electron to a higher energy level. Heating the material enables the trapped states to interact with phonons and decay into lower-energy. A fiber-optic sensor is a sensor that uses optical fiber either as the sensing element ("intrinsic sensors"), or as a means of relaying signals from a remote sensor to the electronics that process the signals ("extrinsic sensors"). Depending on the. It covers essential components like transmitters, detectors, optical couplers, isolators, circulators, switches, amplifiers, filters, equalizers, connectors, multiplexers, de-multiplexers, and more. The principle of operation of a fiber sensor is that the transducer modulates some parameter of the optical system (intensity, wavelength. A Fiber Sensor is a type of Photoelectric Sensor that enables detection of objects in narrow locations by transmitting light from a Fiber Amplifier Unit with a Fiber Unit. Detection in Narrow Locations The small sensing section and flexible Fiber Unit cable enable a Fiber Sensor to detect.