Title :
Up and down UV-trimming of planar directional waveguide couplers: modeling
Author_Institution :
Arbeitsbereich Opt. und Messtech., Tech. Univ. Hamburg-Harburg, Germany
fDate :
7/1/2000 12:00:00 AM
Abstract :
In contrast to etched channel waveguide couplers, directional couplers UV-written into a photosensitive layer can be both down and up trimmed by UV post-illumination of the waveguide cores and of the separating photosensitive region, respectively. Theoretically, the coupling length can be corrected by 10%-40% several times, before the third supermode starts to propagate.
Keywords :
etching; integrated optics; multiplexing equipment; optical communication equipment; optical directional couplers; optical fabrication; optical waveguide components; UV post-illumination; UV-written; coupling length; down UV-trimming; optical directional couplers; photosensitive layer; planar directional waveguide coupler model; separating photosensitive region; supermode; up UV-trimming; waveguide cores; Bragg gratings; Directional couplers; Etching; Optical filters; Optical propagation; Optical waveguide theory; Optical waveguides; Planar waveguides; Propagation constant; Silicon compounds;
Journal_Title :
Photonics Technology Letters, IEEE
