METHOD AND APPARATUS FOR MEASURING BIREFRINGENCE OF OPTICAL FIBER, METHOD OF MEASURING POLARIZATION MODE DISPERSION OF THE OPTICAL FIBER, AND THE OPTICAL FIBER

摘要

PROBLEM TO BE SOLVED: To provide a method and an apparatus for measuring birefringence and PMD of an optical fiber with relatively small PMD in a free state correctly in a short time.;SOLUTION: The method of measuring the birefringence of the optical fiber includes steps of acquiring a Jones matrix R(z) in first back-and-forth sections (0, z) between a measurement start point 0 and a predetermined position z on the optical fiber to be measured and a Jones matrix R(z+Δz) in second back-and-forth sections (0, z+Δz) between the measurement start point and a position z+Δz different from the position z, calculating eigen values ρ₁, ρ₂ of a matrix R(z+Δz)R(z)^-1, and obtaining the birefringence in a micro section Δz by calculation.;COPYRIGHT: (C)2007,JPO&INPIT