Fiber Optic Sensing Angle
Optical fibers can be used as sensors to measure, , and other quantities by modifying a fiber so that the quantity to be measured modulates the,,, or transit time of light in the fiber. Sensors that vary the intensity of light are the simplest, since only a simple source and detector are required. Special fibers like long-period fiber grating (LPG) optical fibers can be used for direction recognition . This work reviews the ber-optic sensors based on Bragg gratings, long fi period gratings, interferometers, surface plasmon resonance, uorescence, and light fl diffusion.
Read More