Simple method of measuring scattering losses in optical fibers

Abstract

A simple method of measuring the scattering losses of optical fibers was developed. The method permits the measurement of the scattering-loss spectra by use of photon counting. Measurement is based on right-angle scattering, which is dominated by Rayleigh scattering, a material-intrinsic loss. A reference fiber for which the scattering loss is known is used to cancel out the unknown factors that are dependent on the optical setup. The scattering-loss measurement was demonstrated by use of two different low-loss fibers and was found to agree with predetermined figures to within 10% over the wavelength range 0.44–1.0 µm. Finally, the method was applied to a new high-numerical-aperture optical fiber to find its material scattering loss.

© 1999 Optical Society of America

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