RANDOM REFRACTIVE INDEX MODULATED OPTICAL FIBERS

摘要

An optical fiber containing one or more random modulations capable of reflecting one or more random wavelengths of light passing through the optic al fiber is provided. Each modulation is a section of the optical fiber in which the refractive index has been modified or a section of random refractive index optical fibe r that has been spliced into the optical fiber. The optical fiber is produced by modifying the refractive index of at least one portion of the optical fiber through photo- etching, photo-bleaching, ultraviolet radiation exposure or splicing. The optical fib er containing the random modulation is used to measure one or more engineering parameters by locating the section or portion of the optical fiber containin g the random modulation in an area where the engineering parameter is to be measur ed and measuring the engineering parameter using optical frequency domain reflectometry.