Title :
Extended tuning range integrated receivers with grating-assisted codirectional coupler optical filters
Author :
Jan, Yu-Heng ; Heimbuch, Mark E. ; Coldren, Larry A. ; DenBaars, Steven P.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
Abstract :
In recent years, there has been continuous interest in developing tunable receivers for wavelength-division multiplexed (WDM) systems. A direct-detection receiver with a combination of an optical preamplifier and an optical filter offers possible high sensitivity and selectivity. In this paper, we report on an InP/InGaAsP widely tunable receiver, which integrates a semiconductor optical amplifier (SOA), a tunable two-stage grating-assisted codirectional coupler (GACC) optical filter, and a waveguide photodetector. The integrated device can be continuously tuned for a 45-nm wavelength range, however, side-lobes are higher than desired. With suitable tapering in the GACC sections, it is predicted that the side-lobes of the integrated device can be depressed to be as low as -50 dB
Keywords :
III-V semiconductors; diffraction gratings; gallium arsenide; indium compounds; integrated optics; optical directional couplers; optical receivers; optical waveguide filters; tuning; GACC tapering; InP-InGaAsP; WDM system; grating-assisted codirectional coupler optical filter; integrated receiver; semiconductor optical amplifier; sidelobe suppression; tuning range; waveguide photodetector; Gratings; Optical filters; Optical receivers; Optical sensors; Optical tuning; Optical waveguides; Preamplifiers; Semiconductor optical amplifiers; Stimulated emission; Wavelength division multiplexing;
Conference_Titel :
Optical Fiber Communication. OFC 97., Conference on
Conference_Location :
Dallas, TX
Print_ISBN :
1-55752-480-7
DOI :
10.1109/OFC.1997.719670
