Title :
A comparison between different propagative schemes for the simulation of tapered step index slab waveguides
Author :
Haes, Jan ; Baets, Roel ; Weinert, C.M. ; Gravert, M. ; Nolting, H.P. ; Andrade, M. Adelaide ; Leite, A. ; Bissessur, Hans K. ; Davies, J.B. ; Ettinger, Robert D. ; Ctyroky, Jiri ; Ducloux, E. ; Ratovelomanana, F. ; Vodjdani, N. ; Helfert, Stefan ; Pregla
Author_Institution :
Dept. of Inf. Technol., Ghent Univ., Belgium
fDate :
6/1/1996 12:00:00 AM
Abstract :
The performance and accuracy of a number of propagative algorithms are compared for the simulation of tapered high contrast step index slab waveguides. The considered methods include paraxial as well as nonparaxial formulations of optical field propagation. In particular attention is paid to the validity of the paraxial approximation. To test the internal consistency of the various methods the property of reciprocity is verified and it is shown that for the paraxial algorithms the reciprocity can only be fulfilled if the paraxial approximation of the power flux expression using the Poynting vector is considered. Finally, modeling results are compared with measured fiber coupling losses for an experimentally realized taper structure
Keywords :
approximation theory; modelling; optical fibre couplers; optical losses; optical waveguide theory; optical waveguides; refractive index; vectors; Poynting vector; fiber coupling losses; internal consistency; nonparaxial formulations; optical field propagation; paraxial algorithms; paraxial approximation; paraxial formulations; power flux expression; propagative algorithms; propagative schemes; simulation; taper structure; tapered high contrast step index slab waveguides; tapered step index slab waveguides; Etching; Fiber lasers; Laser modes; Optical coupling; Optical propagation; Optical refraction; Optical variables control; Optical waveguides; Slabs; Waveguide lasers;
Journal_Title :
Lightwave Technology, Journal of
