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US 2025/0105940 A1Published application
Partially Colored Flexgrid Wavelength-Division Multiplexer/Demultiplexer
AssigneeGoogle Inc.
InventorRene Marcel Schmogrow
Life of this patent
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Abstract
Wavelength division multiplexing technology in which a layer of arrayed waveguides is used to extend the number of ports of wavelength selective switches used in multiplexing and/or demultiplexing the optical signals transported over the optical network. In some examples, the wavelength division multiplexing technology is used as part of an optical signal communication system, such as between data centers or as part of a larger network.
Claims20
A wavelength division multiplex apparatus, comprising:
- a plurality of optical modules, each optical module having a first arrayed waveguide grating, the first arrayed waveguide grating including a first output port and a plurality of first input ports, each of the plurality of first input ports configured to receive optical data signals from one of a plurality of transponders for transmission on a transport fiber, the first output port outputting a combined signal formed from the optical data signals received from the plurality of transponders,
- wherein the plurality of optical modules are configured so that spectrally adjacent optical signals are mapped to corresponding first input ports on a different ones of the plurality of optical modules, and
- wherein each optical module has an optical amplifier having an output and an input, the input of the optical amplifier being coupled to receive the combined signal from the first output port of the first arrayed waveguide grating.
An optical module for a wavelength division multiplexer or demultiplexer, comprising:
- a first arrayed waveguide grating, the first arrayed waveguide grating including a first output port and a plurality of first input ports, each of the plurality of first input ports configured to receive optical data signals from one of a plurality of optical transponders for transmission on a transport fiber, the first output port outputting a combined signal formed from the optical data signals received from the plurality of transponders,
- a first arrayed waveguide grating, the first arrayed waveguide grating including a first output port and a plurality of first input ports, each of the plurality of first input ports configured to receive optical data signals from one of a plurality of optical transponders for transmission on a transport fiber, the first output port outputting a combined signal formed from the optical data signals received from the plurality of transponders, and
- an optical amplifier having an output and an input, the input of the optical amplifier being coupled to receive the combined signal from the first output port of the first arrayed waveguide grating.
A system, comprising:
- a plurality of transponders;
- a transport fiber;
- and
- a plurality of optical modules, each optical module having a first arrayed waveguide grating, the first arrayed waveguide grating including a first output port and a plurality of first input ports, each of the plurality of first input ports configured to receive optical data signals from one of the plurality of transponders for transmission on the transport fiber, the first output port outputting a combined signal formed from the optical data signals received from the plurality of transponders,
- wherein the plurality of optical modules are configured so that spectrally adjacent optical signals are mapped to corresponding first input ports on a different ones of the plurality of optical modules, and
- wherein each optical module has an optical amplifier having an output and an input, the input of the optical amplifier being coupled to receive the combined signal from the first output port of the first arrayed waveguide grating.
3 more elements
Dependencies are inferred from the claim text.