Title :
A compact photonic horizontal spot-size converter realized in silicon-on-insulator
Author :
Luyssaert, Bert ; Vandersteegen, Peter ; Taillaert, Dirk ; Dumon, Pieter ; Bogaerts, Wim ; Bienstman, Peter ; Van Thourhout, Dries ; Wiaux, Vincent ; Beckx, Stephan ; Baets, Roel
Author_Institution :
Dept. of Inf. Technol., Ghent Univ.-IMEC, Gent, Belgium
Abstract :
We present a compact planar coupler connecting two optical waveguides with highly different widths. The coupler consists of various nonperiodic waveguide sections, whose dimensions are determined using a genetic optimization algorithm. Efficiencies that exceed those of the more conventional designs with similar lengths, like gradual linear tapers, were obtained in silicon-on-insulator using 248-nm-deep ultraviolet lithography.
Keywords :
genetic algorithms; integrated optics; optical couplers; optical waveguides; silicon-on-insulator; ultraviolet lithography; 248 nm; compact photonic spot-size converter; genetic optimization algorithm; gradual linear tapers; horizontal spot-size converter; nonperiodic waveguide sections; optical waveguides; planar coupler; silicon-on-insulator; ultraviolet lithography; Coupling circuits; Crystalline materials; Optical coupling; Optical materials; Optical planar waveguides; Optical waveguides; Photonics; Planar waveguides; Refractive index; Silicon on insulator technology; Compact coupler; high index contrast; nonadiabatic taper; optical coupler;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.838655
