METHOD FOR TWO-FREQUENCY SCATTEROMETRY OF FIBER LIGHT GUIDE

摘要

Method for two-frequency scatterometry of fiber light guide includes simultaneous emission of optical signal on two wavelengths at two time instants to fiber light guide. One determines coefficient of decay of reflected optical signal. One determines and identifies equivalent weight of object. One determines difference of calculated equivalent weight of object for two time instants with comparison to rated value. One makes decision on effect of object revealed on optical fiber with determination of range to place of effect.