| 摘要 |
An electro-optical switch (170) for receiving N data streams optically, each of said N data streams having an amplitude and a phase and each being located at an optical centre frequency FO1+RFM, where FO1 is a first optical modulation frequency and RFM is a signal centre frequency. The electro-optical switch is arranged to convert the N data streams to electrical data signals at the data stream's signal centre frequency RFM, the electrical data signals having the amplitude and phase of the optical data stream. The electro-optical switch is further arranged to convert electrical data signals to optical output signals at optical centre frequency FO2+RFOut with the amplitude and phase of the first electrical data signal maintained, and to transmit the optical output signals, with RFM and RFOut, being equal to or different from each other, and FO1 and FO2 also being equal to or different from each other.
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