Title :
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
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;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.879928
