Title :
High-contrast measurement of refractive-index profile in fused single-mode fibre couplers with high resolution by deconvolution
Author :
Oehler, A.M. ; Hauff, T.M. ; Moratzky, M. ; Heinlein, W.E.
Author_Institution :
Kaiserslautern Univ., West Germany
Abstract :
The optical contrast of the refracted near-field measurement method for fibre refractive-index profiles has been improved by a factor of about five by using numerical apertures adapted to the coupler to be measured. A spatial resolution of 0.3 mu m was achieved by deconvolving with the effective scanning near field.
Keywords :
optical communication equipment; optical couplers; optical fibres; refractive index measurement; deconvolution; effective scanning near field; fibre refractive-index profiles; fused single-mode fibre couplers; measurement of refractive-index profile; numerical apertures; optical contrast; refracted near-field measurement method; spatial resolution;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19900008
