Title :
Codirectional grating-coupled filter for wavelength selective photodetection
Author :
Sakata, H. ; Takeuchi, Shoji ; Hiroki, T.
Author_Institution :
Canon Res. Center, Kanagawa, Japan
fDate :
4/9/1992 12:00:00 AM
Abstract :
Wavelength selective photodetection employing a vertical coupler filter is described based on a GaAs-AlGaAs p-i-n structure. The filter centre wavelength was varied depending on the grating period by 12.8 nm/ mu m for the transverse electric mode. Frequency response indicated that a cutoff frequency was at least 1 GHz. The proposed device has the potential for use in wavelength selective photodetection having a 3 dB bandwidth down to 1 nm or less; the device is only 1 mm long.
Keywords :
diffraction gratings; frequency response; integrated optics; integrated optoelectronics; optical filters; photodetectors; 1 GHz; 1 mm; GaAs-AlGaAs; codirectional type; cutoff frequency; p-i-n structure; transverse electric mode; wavelength selective photodetection;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920474
