Biased Perturbation Method for Index Profiling Single-Mode Fibers from Near-Field and Far-Field Data
N. H. Fontaine, M. Young
We have developed a biased perturbation method for calculating the index profiles of single-mode fibers from either near-field or far-field data. Unlike other perturbation and direct inversion methods, which require smoothing of the near-field data, our method works by smoothing the perturbation. This biased perturbation method minimizes the loss of resolution and distortion at large radii and forces the index profile to converge to the cladding index. We have compared index profiles with those measured by the refracted near-field method, showing agreement within δnnearly equal to} 0.0005 from the fiber axis to a radius of 20 5m.
and Young, M.
Biased Perturbation Method for Index Profiling Single-Mode Fibers from Near-Field and Far-Field Data, Tech. Dig., Symp. on Optical Fiber Meas., Boulder, CO
(Accessed May 28, 2023)