Patent ID: 11962352
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC G  H | IPC H

Claim 14:
15. A method, comprising:
transmitting an input first optical signal to a first wavelength division multiplexer (WDM) using a first port, wherein the first optical signal is a multi-wavelength signal, and a device comprises the first port, a second port, the first WDM, an optical splitter, an optical monitor, an optical switch, and a second WDM, wherein the optical splitter and the optical switch are disposed along an optical path between the first WDM and the second WDM;
demultiplexing the first optical signal by using the first WDM, to obtain a demultiplexed first optical signal, wherein the demultiplexed first optical signal comprises multiple spatially separated wavelength signals;
splitting the demultiplexed first optical signal by using the optical splitter, to obtain a first sub-signal and a second sub-signal, wherein a quantity of spatially separated wavelength signals in the second sub-signal is the same as that in the demultiplexed first optical signal;
performing optical switching on the first sub-signal by using the optical switch;
multiplexing, by the second WDM, the first sub-signal obtained after the performing the optical switching, to obtain a multiplexed first sub-signal;
outputting, by using the second port, the multiplexed first sub-signal; and
performing optical performance monitoring on the second sub-signal by using the optical monitor.