Title :
Multifunctional grating couplers for bidirectional incoupling into planar waveguides
Author :
Backlund, Johan ; Bengtsson, Jörgen ; Carlström, Carl-Fredrik ; Larsson, Anders
Author_Institution :
Dept. of Microelectron., Chalmers Univ. of Technol., Goteborg, Sweden
fDate :
3/1/2000 12:00:00 AM
Abstract :
A novel type of grating coupler for coupling light from free space into a planar waveguide was designed. Compared to a conventional grating coupler which can couple light into one main direction, this new design enables simultaneous coupling into two opposite main directions. This leads to increased flexibility in integrated optics design and may also increase the overall coupling efficiency. We demonstrate experimentally devices for bidirectional incoupling with additional beam splitting and focusing capabilities.
Keywords :
diffraction gratings; optical beam splitters; optical couplers; optical design techniques; optical focusing; optical planar waveguides; additional optical beam splitting; bidirectional incoupling; coupling light; free spac; integrated optics design; multifunctional grating couplers; optical focusing capabilities; overall coupling efficiency; planar waveguides; Couplers; Coupling circuits; Gratings; Holographic optical components; Integrated optics; Optical coupling; Optical design; Optical propagation; Optical waveguides; Planar waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
