Title :
A simple 8*8 optoelectronic crossbar switch
Author :
Forrest, S.R. ; Tangonan, G.L. ; Jones, V.
Author_Institution :
Dept. of Electr. Eng. & Mater. Sci., Univ. of Southern California, Los Angeles, CA, USA
fDate :
4/1/1989 12:00:00 AM
Abstract :
The authors demonstrate the operation of an 8*8 optoelectronic crossbar switch consisting of integrated arrays of eight 1*8 GaAs metal-semiconductor-metal (MSM photodiodes connected in a current summing network to the input of Si bipolar transimpedance amplifiers. The MSM devices are also connected to TTL transistor-transistor logic) driven CMOS analog multiplexers which, in the ´off´ state, switch the detectors into an open-circuit mode. This particular combination of detectors and switching network gives a very high interchannel isolation, reduced circuit complexity, and low input noise. Data rates of 200 Mbit´s and switch reconfiguration times of -100 ns are achieved. System noise is calculated and measured, and the advantages of using fully integrated GaAs crossbar switch arrays are quantitatively discussed.<>
Keywords :
amplifiers; integrated optoelectronics; multiplexing equipment; noise; optical switches; photodiodes; -100 ns; 200 Mbit/s; 8*8 optoelectronic crossbar switch; CMOS analog multiplexers; GaAs; MSM; Si; bipolar transimpedance amplifiers; current summing network; integrated arrays; interchannel isolation; metal-semiconductor-metal photodiodes; open-circuit mode; switch reconfiguration; switching network; system noise; transistor-transistor logic; CMOS logic circuits; Detectors; Gallium arsenide; Logic devices; Multiplexing; Operational amplifiers; Photodiodes; Reconfigurable logic; Switches; Switching circuits;
Journal_Title :
Lightwave Technology, Journal of
