Patent ID: 8861968

Claim:
An inresistant, colorless reconfigurable optical add/drop multiplexing device, wherein the device comprises: a dropping unit, configured to: separate multi-wavelength optical signals which are input to the dropping unit from directions 1 to X, switch the multi-wavelength optical signals from the directions 1 to X to any corresponding output port through multiple N×N optical switches, and send the optical signals to a corresponding receiver (RX) after combining the received optical signals through a corresponding K×1 coupler/optical switch; and an adding unit, configured to: broadcast the optical signals sent by a transmitter (TX) to the multiple N×N optical switches through N 1×K couplers/optical switches, switch the optical signals to any corresponding output port by the respective N×N optical switches, and multiplex the corresponding optical signals in the directions 1 to X and output the corresponding optical signals in a circuit direction; wherein, X is an integer which is greater than or equal to 2, and K and N are both integers; wherein 1×M optical de-multiplexer units in the directions 1 to X and Y N×N optical switches are arranged in the dropping unit, wherein: the 1×M optical de-multiplexer units in the directions 1 to X are connected with the Y N×N optical switches and configured to separate the optical signals with different wavelengths from the directions 1 to X, and output the optical signals to the Y N×N optical switches; and the Y N×N optical switches are connected with the 1×M optical de-multiplexer units and configured to switch the input multi-wavelength optical signals in each direction to any corresponding output port, and send the optical signals to the corresponding K×1 couplers/optical switches; wherein, X is an integer which is greater than or equal to 2; K, Y, M and N are all integers greater than 1, K is greater than or equal to Y, and N is greater than or equal to M, and Y×N is greater than or equal to X×M; wherein the adding unit is provided with M×1 multiplexers in the directions 1 to X and Y N×N optical switches, wherein: the Y N×N optical switches are connected with the M×1 multiplexers and configured to switch the optical signals of multiple direction broadcast from the 1×K couplers/optical switches to any corresponding output port; and the M×1 multiplexers in the directions 1 to X are connected with the Y N×N optical switches and configured to output the optical signals after multiplexing the optical signals in the corresponding direction outputted by the N×N optical switches.