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A simple 8*8 optoelectronic crossbar switch

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3 Author(s)
Forrest, S.R. ; Dept. of Electr. Eng. & Mater. Sci., Univ. of Southern California, Los Angeles, CA, USA ; Tangonan, G.L. ; Jones, V.

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.<>

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Lightwave Technology, Journal of  (Volume:7 ,  Issue: 4 )