Title :
Optimised coupling into planar waveguides with cylindrical prisms
Author :
Chelnokov, A.V. ; Lourtioz, J.M.
Author_Institution :
Inst. d´´Electron. Fondamentale, Univ. de Paris-Sud, Orsay, France
fDate :
2/16/1995 12:00:00 AM
Abstract :
The authors report a theoretical analysis and practical implementation of cylindrical prisms for very efficient coupling into standard planar waveguides. The 90 and 92% efficiencies, respectively, measured at 638 and 980 nm for several SiON waveguides on silicon are among the highest performances reported to date with the prism coupling technique. Still higher values are predicted for the case of cylindrical prisms with radius of curvature larger than used
Keywords :
optical couplers; optical planar waveguides; optical prisms; silicon compounds; 638 nm; 90 percent; 92 percent; 980 nm; Si; SiON waveguides; SiON-Si; cylindrical prisms; optimised coupling; planar waveguides; prism coupling technique; radius of curvature;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19950192
