Ideal Bend Contour Trajectories for Single-Mode Operation of Low-Loss Overmoded Waveguides

Author

Koos, Christian ; Poulton, Christopher G. ; Zimmermann, Lars ; Jacome, Lenin ; Leuthold, Juerg ; Freude, Wolfgang

Author_Institution

Inst. of High-Frequency & Quantum Electron., Karlsruhe Univ.

Volume

19

Issue

11

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

819

Lastpage

821

Abstract

Bend designs for single-mode operation of low-loss overmoded waveguides are presented. A class of contour trajectories for minimum radiation loss is derived analytically, and numerical optimization is used to find ideal trajectory parameters. Three-dimensional finite-difference time-domain simulations predict bend losses below 0.1 dB for 180deg-bends of overmoded silicon-on-insulator waveguides with a radius of R=1.5 mum. These findings are supported experimentally

Keywords

bending; finite difference time-domain analysis; integrated optics; optical losses; optical waveguides; silicon-on-insulator; waveguide discontinuities; 1.5 mum; Si-SiO₂; bend designs; bend losses; ideal bend contour trajectories; ideal trajectory parameters; low-loss waveguides; overmoded waveguides; radiation loss; single-mode operation; three-dimensional finite-difference time-domain simulations; Finite difference methods; Light scattering; Mirrors; Optical losses; Optical resonators; Optical scattering; Optical waveguides; Particle scattering; Predictive models; Time domain analysis; Multimode waveguides; variational methods; waveguide bends;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2007.897294

Filename

4182412