Simple 8 \times 8 optoelectronic crossbar switch
Abstract
The authors demonstrate the operation of an 8 x 8 optoelectronic crossbar switch consisting of integrated arrays of eight 1 x 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.
- Publication:
-
Journal of Lightwave Technology
- Pub Date:
- April 1989
- DOI:
- 10.1109/50.19086
- Bibcode:
- 1989JLwT....7..607F
- Keywords:
-
- Gallium Arsenides;
- Msm (Semiconductors);
- Optical Switching;
- Optoelectronic Devices;
- Photodiodes;
- Silicon Transistors;
- Bit Error Rate;
- Cmos;
- Light Emitting Diodes;
- Photometers;
- Schottky Diodes;
- Volt-Ampere Characteristics;
- Optics