| 摘要 |
A network element has at least one input, to which an optical signal can be fed, and at least one output, which is equipped to emit an optical signal; a first coupler having an input linked to the network element input and a first and a second output; an optical receiver having at least one input coupled to the second output of the first coupler and at least one output; an optical sender having at least one input of which is linked to the output of the optical receiver; a signal processing device being arranged in the signal path; a second coupler having a first input linked to the first output of the first coupler, a second input linked to the output of the optical sender, and an output which is linked to the first output of the network element. |
| 主权项 |
1. A network element having
at least one first input, to which an optical signal may be supplied, at least one first output, which is designed to emit an optical signal, wherein the network element comprises further a first coupler, with an input and a first output and a second output, the first input of the network element being coupled to the input of the first coupler, and the network element further comprises an optical receiver, which has at least one input and at least one output, the second output of the first coupler being coupled to the input of the optical receiver, the network element further comprises an optical transmitter, which has at least one input and at least one output, the network element further comprises a signal-processing device with at least one first input and at least one first output, the output of the optical receiver being coupled to the input, and the input of the optical transmitter being coupled to the output, the network element further comprises a second coupler, with a first input, a second input and an output, the first output of the network element being coupled to the output of the second coupler, the first input of the second coupler being coupled to the first output of the first coupler, and the second input of the second coupler being coupled to the output of the optical transmitter, wherein the signal-processing device is adapted to provide a signal at its output which is formed such that it comprises a signal component which cancels the signal originally transported on this channel when interfering in the second coupler, and wherein the signal-processing device comprises at least one inverter with an input and an output and an optional low-pass filter with an input and an output,
the input of the inverter being coupled to the first input and/or the second output of the signal-processing device,the output of the inverter being coupled to the output of the signal processing device and/or to the second input of the signal-processing device, andthe optical low-pass filter being arranged in the signal path between the input of the inverter and the first input of the signal-processing device. |
