Star type multi-stage network

Details Star type multi-stage network Star type multi-stage network

1992-08-13

1996-04-09

Olms, Douglas W.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359121, 359127, 359128, 370 93, H04J 1400

Patent

active

055067115

ABSTRACT:
A star type multi-stage network having the same connectivity graph between stages and having a physical topology of a star form, comprises a plurality of columns assigned with different specific transmission wavelengths, respectively, NIU's each including a transmitter for making a transmission on a wavelength assigned to a column to which that NIU (network interface unit) belongs and a receiver for receiving a wavelength assigned to a column from which reception is to be made, and a fundamental connection section including a connection portion formed by optical fibers or optical waveguides to provide a fundamental connection pattern between stages. Inputs and outputs of the optical fibers or optical waveguides are connected to couplers having inputs or outputs the number of which is equal to at least the number of the transmitters of the NIU's. Outputs of the transmitters of the NIU's are connected to inputs of the fundamental connection section corresponding to connectivity between stages. Inputs of the receivers of the NIU's are connected to outputs of the fundamental connection section corresponding to connectivity between stages.

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