Low Loss and Low Crosstalk Waveguide Crossings Designed by Wavefront Matching Method

Author

Sakamaki, Yohei ; Saida, Takashi ; Tamura, Munehisa ; Hashimoto, Toshikazu ; Takahashi, Hiroshi

Author_Institution

NTT Photonics Labs., Kanagawa

Volume

18

Issue

19

fYear

2006

Firstpage

2005

Lastpage

2007

Abstract

We designed waveguide crossings with small angles by the wavefront matching method to reduce excess loss and crosstalk. The designed waveguide crossings were fabricated using silica-based planar lightwave circuit (PLC) technology. We experimentally obtained excess loss and crosstalk values of less than 0.3 and -30 dB, respectively, for a crossing angle of 5deg, and of less than 0.1 and -38 dB, respectively, for an angle of 20deg, in the 1530-1565-nm wavelength range. The designed waveguide crossings are promising as basic circuit elements for realizing more compact PLC devices

Keywords

integrated optics; optical crosstalk; optical design techniques; optical losses; optical waveguides; 1530 to 1565 nm; circuit elements; crossing angle; low crosstalk waveguide crossings; low loss waveguide crossings; planar lightwave circuit devices; silica-based planar lightwave circuit; wavefront matching; waveguide crossing design; waveguide crossing fabrication; Circuits; Optical attenuators; Optical crosstalk; Optical devices; Optical fiber networks; Optical planar waveguides; Optical waveguides; Planar waveguides; Programmable control; Waveguide junctions; Design methodology; optical crosstalk; optical planar waveguides; waveguide junctions;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2006.879928

Filename

1703617