Efficient single-hop directional multichannel system

Details Efficient single-hop directional multichannel system Efficient single-hop directional multichannel system

1991-09-30

1992-09-08

Ullah, Akm E.

Optical waveguides

With optical coupler

Plural

359115, 359127, G02B 600, G02B 636

Patent

active

051465140

ABSTRACT:
A shared directional multichannel for efficiently transmitting k=( log.sub.p n choose (p-1)) concurrent, non-interfering transmissions from a set of m.gtoreq.k source stations, each having p transmitters, to a set of n destination stations, each having one receiver, without active repeater components. The multichannel architecture permits implementation of an efficient single-hop multichannel system using optical star couplers in a manner that limits the power spreading loss to the n/p value known for bus-oriented networks instead of n.sup.2 /p. Several coupling stages are employed, each stage having a plurality of identical substantially-square directional couplers, to obtain channel concurrency k, which is an improvement over the concurrency p available in bus-oriented networks, without the higher power spreading loss normally arising from the larger number of connections between each source station and every destination station.

REFERENCES:
patent: 4458187 (1984-07-01), Heiman
patent: 4543666 (1985-09-01), Witte et al.
patent: 4551812 (1985-11-01), Gurr et al.
patent: 4914648 (1990-04-01), Acampora et al.
Matthew T. Busche, et al., "On Optical Interconnection of Stations Having Multiple Transmitters and Receivers", 1990 International Symposium On Information Theory and Its Applications (ISITA'90), Hawaii, U.S.A., Nov. 27-30, 1990, Session 63-3, pp. 967-970.
Yitzhak Birk, et al., "On The Uniform-Traffic Capacity of Single-Hop Interconnections Employing Shared Directional Multichannels", Internal IBM report #RJ 7859 (72519), Dec. 5, 1990.

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