Multiplex communications – Wide area network – Packet switching
Patent
1988-01-20
1990-08-28
Orsino, Joseph A.
Multiplex communications
Wide area network
Packet switching
250553, 34082581, 350 9614, 455600, H04J 1400, H04B 1000
Patent
active
049531557
ABSTRACT:
An optoelectronic crossbar switch 50 for selectively connecting signals on a plurality of optical fiber channels 52 to a given number of output receivers 30-36. Each optical fiber channel is split into a different number of optical fibers 56(a-h) which are arranged into an array having a plurality of rows and columns. Each row contains a fiber from each channel. A current summation network 58 is provided for each row and advantageously employs a plurality of selectively activatable detectors 60-74. The detectors are held in their open circuit state via a CMOS multiplexer 80 so as to minimize crosstalk between addressed and nonaddressed detectors. The switch 50 construction also minimizes the number of required components.
REFERENCES:
patent: 4074142 (1978-02-01), Jackson
patent: 4221932 (1980-09-01), Anglikowski
patent: 4696059 (1987-09-01), MacDonald
"Monolithically Intregrable High Speed Photodetectors", D. J. Jackson et al, Proc. SPIE 716 (1987) 104.
"Symmetric MOTT Barrier As a Fast Photodetector", Wei et al., Electron Lett 17, 688 (1981).
"Optoelectronic Broadband Switch Array", MacDonald et al., Electron Lett 14 (1978) page 502.
R. A. Peters, "Optical Switch Matrices for SS-TDMA Applications", Proc. of 7th International Conf. on Digital Satellite Communications, May 12-16, 1986, pp. 579-585.
L. D. Hutcheson, "Optical Interconnect Technology Developments", 1986, Proc. Fall Joint Computer Conf., Nov. 2-6, 1986, pp. 448-456.
S. F. Sun et al., "A Review on Classification of Optical Switching Systems", IEEE Communications Magazine, vol. 24, No. 3, May 3, 1986, pp. 50-55.
Forrest Stephen R.
Jones Vincent L.
Tangonan Gregory L.
Beek L. Van
Denson-Low W. K.
Duraiswamy V. D.
Hughes Aircraft Company
Orsino Joseph A.
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