High bandwidth network based on wavelength division multiplexing
AssigneeDigital Equipment Corporation
InventorDonald H. McMahon
Life of this patent
Estimating the term…
Abstract
A network interconnection architecture for a plurality of nodes uses sets of grouped node connections which form a plurality of node groups. A central electrically passive interconnection hub is coupled via a signal transmission path to each node group to establish a full mesh coupling between each of the plurality of node groups. An input and output matrix switch along with a pair of 1.times.N multiplexers are also coupled to each of the plurality of node groups and the hub multiplexer via the signal transmission path. The architecture can be further extended to encompass other networks with electrically passive hubs using a sandwich coupling of a matrix switch between two wavelength multiplexers.
Claims19
An optical transmultiplexer device, comprising:
- a) a plurality of input signal ports which carry an input signal;
- b) a plurality of output signal ports which carry an output signal;
- c) means for wavelength selection from said input signal enabling a point-to-point transfer of optical signal wavelengths between the input signal and output signal ports;
- d) an optic device coupled to said means for wavelength selection which provides additional focussing of said input and output signals into and from the means for wavelength selection, respectively, for efficient coupling between the input signal and output signal ports;
- e) wherein said optic device comprises additional signal ports for receiving selected wavelengths from the output side of said means for wavelength selection and means for coupling the additional signal ports to selected output signal ports.
The optical transmultiplexer device comprising:
- a) A plurality of N input signal ports which carry an input signal;
- b) a plurality of N output signal ports which carry an output signal;
- c) means for wavelength selection from said input signal enabling a point-to-point transfer of optical signal wavelengths between the N input signal and N output signal ports;
- d) an optic device coupled to said means for wavelength selection which provides additional focussing of said input and output signals into and form the means for wavelength selection, respectively, for efficient coupling between the N input signal and N output signal ports;
- e) wherein the means for wavelength selection comprises a Littrow mount which includes a birefringent prism.
An optical transmultiplexer device comprising:
- a) A plurality of N input signal ports which carry an input signal;
- b) a plurality of N output signal ports which carry an output signal;
- c) means for wavelength selection from said input signal enabling a point-to-point transfer of optical signal wavelengths between the N input signal and N output signal ports;
- d) an optic device coupled to said means for wavelength selection which provides additional focussing of said input and output signals into and from the means for wavelength selection, respectively, for efficient coupling between the N input signal and N output signal ports;
- e) wherein the means for wavelength selection comprises a Littrow mount which includes a split diffraction grating.
An optical transmultiplexer device, comprising:
- a) a plurality of input signal ports which carry an input signal;
- b) a plurality of output signal ports which carry an output signal;
- c) means for wavelength selection from said input signal enabling a point-to-point transfer of optical signal wavelengths between the input signal and output signal ports, said means for wavelength selection including a Littrow mount;
- d) an optic device coupled to said means for wavelength selection which provides additional focussing of said input and output signals into and from the means for wavelength selection, respectively, for efficient coupling between the input signal and output signal ports;
- e) wherein said optic device comprises additional signal ports for receiving a selected wavelength from the output side of said means for wavelength selection and returning the selected wavelength to the input side of the means for wavelength selection;
- f) wherein said optic device further comprises a mounting block adapted for coupling fibers to said input and output ports of said optical transmultiplexer device.
An optical N.times.N transmultiplexer device comprising:
- a) a plurality of N input signal ports which carry an input signal;
- b) a plurality of N output signal ports which carry an output signal;
- c) means for wavelength selection from said input signal enabling a point to point transfer of optical signal wavelengths between the input signal and output signal ports;
- d) wherein said means for wavelength selection includes a wavelength selective 2.times.2 coupler.
Dependencies are inferred from the claim text.