Patent ID: 11909514
Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A reconfigurable optical add-drop multiplexer, comprising:
at least one optical cross-connect device;
at least two optical signal processing devices corresponding to different optical directions;
each of the optical signal processing devices comprising a wavelength-selective switch and a filter, the wavelength-selective switch being configured to perform wavelength-based allocation on inputted dense wavelength division multiplexing optical signals and input the dense wavelength division multiplexing optical signals into the filter, the filter being configured to separate the optical signals outputted by the wavelength-selective switch into single-channel optical signals, the filter being configured to multiplex a plurality of single-channel optical signals outputted by the optical cross-connect device and input the multiplexed single-channel optical signals into the wavelength-selective switch, the wavelength-selective switch being configured to perform wavelength combination on the optical signals outputted by the filter and output the optical signals; and
the optical cross-connect device comprising N upper ports and N lower ports, the optical cross-connect device being connected to the filters in the optical signal processing devices through the upper ports, the lower ports being connected to an optical transform unit, the optical cross-connect device being configured to drop the single-channel optical signals outputted by the filters, and input single-channel optical signals outputted by the optical transform unit into the filters through the upper ports, wherein:
the at least one optical cross-connect device comprise i optical cross-connect devices, i being an integer greater than 1;
the upper ports of each of the optical cross-connect devices are connected to a target quantity of uplink input ports in the filter in a one-to-one manner, and the target quantity of uplink input ports accounts for 1/i of a total of uplink input ports in the filter;
the upper ports of each of the optical cross-connect devices are connected to a target quantity of downlink output ports in the filter in a one-to-one manner, and the target quantity of downlink output ports accounts for 1/i of a total of downlink output ports in the filter;
N=m×n÷i, wherein the reconfigurable optical add-drop multiplexer corresponds to m optical directions and each optical direction corresponds to optical signals of n wavelengths;
the wavelength-selective switch comprises a first wavelength-selective switch and a second wavelength-selective switch;
the first wavelength-selective switch comprises a first input port and more than one first output port, and the first wavelength-selective switch is configured to receive, through the first input port, the dense wavelength division multiplexing optical signals inputted in an ingress direction, and allocate the dense wavelength division multiplexing optical signals to different first output ports according to wavelengths; and
the second wavelength-selective switch comprises a second output port and more than one second input port, and the second wavelength-selective switch is configured to combine optical signals inputted from the second input ports into the dense wavelength division multiplexing optical signals, and output the dense wavelength division multiplexing optical signals in an egress direction through the second output port, wherein
the ingress direction and the egress direction belong to the same optical direction, and the ingress direction and the egress direction are opposite directions.