Two-Dimensional Index Profiling of Fibers and Waveguides
N. H. Fontaine, M. Young
We have constructued a two-dimensional refracted-ray scanner that can resolve index-of-refraction increments of approximately 4 x 10-5. this resolution is an order of magnitude finer than the uncertainty of the measurement. The scanner can be adapted to evaluate either fibers or planar waveguides. The two-dimensional scan and the high precision allow visualization of features, such as deposition layers, that are difficult if not impossible to see in conventional one-dimensional scans.
critical angle, collimation, fibers, index of refraction, index profile, metrology, multimode, refracted near-field, single-mode
and Young, M.
Two-Dimensional Index Profiling of Fibers and Waveguides, Optics Letters
(Accessed December 5, 2023)