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US 12,520,066 B2Granted
Wavelength selective switch, optical switching device, and system
AssigneeHuawei Technologies Co., Ltd.
InventorsNing Deng, Wei Jia, Liangjia Zong
Life of this patent
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Abstract
A WSS is provided. The WSS includes a first common port, a second common port, a grating, a spatial light modulator, and a plurality of branch ports. The first common port is configured to receive a first-band optical signal, and the second common port is configured to receive a second-band optical signal. The grating is configured to perform wavelength demultiplexing on the first-band optical signal and the second-band optical signal, to output a plurality of first optical signals, where the first optical signals are optical signals of a single wavelength.
Claims20
An optical switching device, comprising:
- a first wavelength selective switch (WSS), wherein the first WSS comprises at least one first common port and a plurality of first branch ports, each first branch port of the plurality of first branch ports is configured to output a first-band optical signal, a second-band optical signal, or a combined signal of the first-band optical signal and the second-band optical signal;
- a first down module, connected to a first branch port of the plurality of first branch ports of the first WSS, and configured to drop the first-band optical signal or the first-band optical signal in the combined signal;
- a second down module, connected to a second branch port of the plurality of first branch ports of the first WSS, and configured to drop the second-band optical signal or the second-band optical signal in the combined signal, and wherein the first branch port and the second branch port are the same branch port or different branch ports of the first WSS;
- a second WSS, wherein the second WSS comprises at least one second common port and a plurality of second branch ports, and each second branch port of the plurality of second branch ports is configured to input a first-band optical signal, a second-band optical signal, or a combined signal of the first-band optical signal and the second-band optical signal, and at least one second branch port of the plurality of second branch ports is connected to at least one first branch port of the plurality of first branch ports;
- a first up module, connected to a third branch port of the plurality of second branch ports of the second WSS, and configured to add the first-band optical signal;
- and
- a second up module, connected to a fourth branch port of the plurality of second branch ports of the second WSS, and configured to add the second-band optical signal, and wherein the third branch port and the fourth branch port are the same branch port or different branch ports of the second WSS.
4 more elements
An optical switching device, comprising:
- a first wavelength selective switch (WSS), wherein the first WSS comprises at least one first common port and a plurality of first branch ports, wherein the at least one first common port is an input port and the plurality of first branch ports are output ports, or the plurality of first branch ports are input ports and the at least one first common port is an output port;
- a band filter, wherein the band filter comprises at least one second common port and a plurality of second branch ports, and the at least one second common port of the band filter is connected to a first branch port of the plurality of first branch ports of the first WSS;
- a first combiner-divider, wherein the first combiner-divider is connected to at least one branch port of the plurality of second branch ports of the band filter, and is configured to add or drop a first-band optical signal or a second-band optical signal;
- and
- a second WSS, wherein the second WSS comprises at least one third common port and a plurality of third branch ports, and a third branch port of the plurality of third branch ports of the second WSS is connected to a second branch port of the plurality of first branch ports of the first WSS, wherein the at least one third common port is an input port and the plurality of third branch ports are output ports, or the plurality of third branch ports are input ports and the at least one third common port is an output port.
2 more elements
Dependencies are inferred from the claim text.