Title :
Wavelength-selective coupling among three vertically integrated optical waveguides by grating couplers
Author :
Ura, Shogo ; Nishida, Ryuji ; Suhara, Toshiaki ; Nishihara, Hiroshi
Author_Institution :
Dept. of Electron. Eng., Osaka Univ., Japan
fDate :
2/1/2001 12:00:00 AM
Abstract :
Selective coupling between two specified optical waveguides in a multistory device via radiation modes was proposed and discussed. Three single-TE-mode waveguides consisting of a Corning 7059 glass guiding core layer and a SiO/sub 2/ waveguide-separation layer were stacked on a Si substrate with grating couplers. The coupling length was 0.5 mm. Contradirectional couplings from the first story to the second story at a wavelength of 814 nm and from the first story to the third story at 819 nm with sharp wavelength dependence of 0.5-nm full-width at half-maximum (FWHM) were experimentally demonstrated.
Keywords :
diffraction gratings; optical design techniques; optical directional couplers; optical fabrication; optical glass; optical planar waveguides; silicon compounds; 0.5 mm; 814 nm; 819 nm; Corning 7059 glass guiding core layer; Si; Si substrate; SiO/sub 2/; SiO/sub 2/ waveguide-separation layer; contradirectional couplings; coupling length; full-width at half-maximum; grating couplers; multistory device; optical waveguides; radiation modes; selective coupling; sharp wavelength dependence; single-TE-mode waveguides; vertically integrated optical waveguides; wavelength-selective coupling; Couplers; Gratings; Integrated optics; Optical coupling; Optical devices; Optical interconnections; Optical waveguide components; Optical waveguides; Semiconductor waveguides; Substrates;
Journal_Title :
Photonics Technology Letters, IEEE
