| 摘要 |
An all-optical processing system is described for converting or interfacing optical signals from a wavelength division multiplexed (WDM) form to an optical time division multiplexed (OTDM) form, where the initial WDM signal typically comprises a non-return to zero (NRZ) signalling format. The system comprises a plurality of NRZ data modulated, cw optical WDM channels (w, x, y, z), which are cross-phase modulated, and thus are spectrally broadened, in an optical non-linear element (745), by a strong clock pulse signal. The resultant signal comprises an RZ representation of the original NRZ signal. The RZ signal is temporally shifted by a dispersive element (760), which temporally shifts each wavelength channel by a predetermined amount, to produce a wavelength-interleaved OTDM signal. The signal is then wavelength converted by cross-phase modulation with a cw control beam in a second non-linear optical element (770), to provide a single wavelength OTDM signal.
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