Title :
Semiconductor monolithic wavelength selective router using a grating switch integrated with a directional coupler
Author :
Shibata, Yasuo ; Oku, Satoshi ; Kondo, Yasuhiro ; Tamamura, Toshiaki ; Naganuma, Mitsuru
Author_Institution :
NTT Opto-Electron. Labs., Kanagawa, Japan
fDate :
6/1/1996 12:00:00 AM
Abstract :
A semiconductor monolithic wavelength selective router is proposed. An electrically tunable grating switch is monolithically integrated with a directional coupler. The effect of sidelobe on the demultiplexing characteristics of the router is investigated, and it is shown that the sidelobes degrade the wavelength crosstalk and introduce a power penalty for demultiplexing characteristics. A phase-synchronized sampled grating is introduced to suppress the sidelobes, and wavelength router switching is observed in this structure. The extinction ratio is over 10 dB at a current injection of 25 mA. Using this structure, power-penalty-free wavelength selective routing at a 2.5 Gb/s wavelength-division-multiplexed NRZ random pattern is demonstrated
Keywords :
demultiplexing; diffraction gratings; electro-optical switches; integrated optoelectronics; optical communication equipment; optical crosstalk; optical directional couplers; semiconductor switches; telecommunication network routing; tuning; wavelength division multiplexing; 2.5 Gbit/s; 25 mA; demultiplexing characteristics; electrically tunable grating switch; extinction ratio; grating switch; integrated optics; optical directional coupler; phase-synchronized sampled grating; power penalty; power-penalty-free wavelength selective routing; semiconductor monolithic wavelength selective router; sidelobe; wavelength crosstalk; wavelength router switching; wavelength-division-multiplexed NRZ random pattern; Demultiplexing; Directional couplers; Gratings; Mirrors; Optical filters; Optical signal processing; Optical waveguides; Switches; Wavelength division multiplexing; Wavelength routing;
Journal_Title :
Lightwave Technology, Journal of
