Title :
The effect of wavefront tilt on mode conversion in asymmetrical Y-branch waveguides
Author :
Frenette, N.J.P. ; Cartledge, J.C.
Author_Institution :
Dept. of Electr. Eng., Queen´´s Univ., Kingston, Ont., Canada
fDate :
4/1/1989 12:00:00 AM
Abstract :
Step approximation models provide a simple method of studying mode propagation and mode conversion in planar Y-branch optical waveguides. They are, however, only applicable to small branching angles since they neglect the wavefront tilt of the separating waveguides. A phasefront tilt approximation which can be used in conjunction with the local normal mode profile of the five-layer structure is introduced. By rotating the Y-branch about the branching point, a symmetrical branching angle is defined so that the phasefront approximation can be used not only for symmetrical Y-branches, but also for Y-branches which have an asymmetrical branching angle or have a change in branching angle along the longitudinal axis of the Y-branch.<>
Keywords :
integrated optics; optical modulation; optical waveguide theory; asymmetrical Y-branch waveguides; integrated optics; mode conversion; mode propagation; phasefront tilt approximation; planar optical waveguides; step approximation models; symmetrical Y-branches; wavefront tilt; Directional couplers; Geometry; Optical coupling; Optical planar waveguides; Optical propagation; Optical switches; Optical waveguide components; Optical waveguide theory; Optical waveguides; Planar waveguides;
Journal_Title :
Quantum Electronics, IEEE Journal of
