Title :
Vertically integrated optical directional couplers in glass for improved edge coupling to a thin-film photodetector
Author :
Noutsios, P.C. ; Yip, G.L.
Author_Institution :
Dept. of Electr. Eng., McGill Univ., Montreal, Que., Canada
Abstract :
An improved vertical coupling structure, consisting of a graded-index planar buried waveguide in glass and a dielectric overlayer, is designed and realized to provide an optimum edge coupling to a modelled GaAs photodetector. Calculations of the attenuation coefficient and coupling efficiency show an optimum absorption behavior. Normal mode measurements and beam propagation calculations of the coupling length and power transfer ratio are compared
Keywords :
dielectric waveguides; gradient index optics; optical couplers; optical directional couplers; optical glass; photodetectors; thin film devices; GaAs; III V semiconductors; attenuation coefficient; beam propagation; coupling efficiency; coupling length; dielectric overlayer; dielectric surface guide; edge coupling; glass; graded-index planar buried waveguide; normal mode measurements; optimum absorption; power transfer ratio; thin-film photodetector; vertical coupling structure; vertically integrated optical directional couplers; Dielectrics; Directional couplers; Gallium arsenide; Glass; Integrated optics; Optical attenuators; Optical planar waveguides; Optical waveguides; Photodetectors; Planar waveguides;
Conference_Titel :
Electrical and Computer Engineering, 1995. Canadian Conference on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-2766-7
DOI :
10.1109/CCECE.1995.528080
