In addition to their use in POF laser devices, they havedirect application in sensing systems. Fibers in this category are typically doped with organic dyes, of the typeused extensively in the printing industry and for display.They are frequently used for decorative purposes, but cladand coated fibers with a fluorescent core are often exploited in sensing and measurement as a result of theirability to capture light, which excites them over theirwhole length.