Wavelength division switching system with reduced optical compon

Details Wavelength division switching system with reduced optical compon Wavelength division switching system with reduced optical compon

1990-11-20

1993-03-16

Coles, Sr., Edward L.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359123, H04J 1402

Patent

active

051949776

ABSTRACT:
In a wavelength division switching system having m.sub.1 inlet highways and m.sub.2 outlet highways, m.sub.1 splitters are coupled respectively to the inlet highways to split each multiplex signal into m.sub.2 .times.n output signals for coupling to respective inputs of m.sub.2 .times.n optical switches. Each optical switch is responsive to a switching control signal for coupling one of its inputs to one of m.sub.2 .times.n tunable wavelength filters capable of passing one of n different wavelengths, in response to a wavelength selecting signal, to one of m.sub.2 .times.n fixed wavelength converters which are organized into m.sub.2 groups. These wavelength converters provide conversion of the input signals so that the converted wavelength is unique in each of the m.sub.2 groups. An array of m.sub.2 combiners are respectively associated with the groups of the fixed wavelength converters and with the outlet highways. Each combiner has n inputs coupled respectively to the outputs of the fixed wavelength converters of the associated group to multiplex signals appearing at the n inputs thereof for coupling to the associated outlet highway.

REFERENCES:
patent: 4989199 (1991-01-01), Rzeszewski
patent: 5005166 (1991-05-01), Suzuki et al.

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