OPTICAL LOSS PROPERTY OF SILICA-BASED SINGLE-MODE FIBERS

The optical loss property of silica fibers has been investigated theoretically and experimentally based on their Rayleigh scattering and absorption losses. The Rayleigh scattering loss for fibers has been estimated using Rayleigh scattering coefficient and power distribution in the fiber. The Rayleigh scattering coefficients are measured for preforms prepared for fiber fabrication and are discussed for GeO2-doped and F-doped glasses. The relationship between the optical loss and fiber parameters are clarified. Moreover, the loss increase due to residual stress which occurs during the drawing process is simulated. The optical loss limitations for GeO2-doped and pure silica core fibers are shown.