| 摘要 |
A data signal processing circuit is arranged to receive (45) an input data signal (43) from a data input (44) and to provide a processed data signal (63) to a source of optical radiation (36) and the source of optical radiation is arranged to generate from this an optical signal for transmission by a multimode optical fibre (33). The data processing circuit (47-62) is arranged to provide from the input data signal (43) a non-inverted data signal (45) and an inverted data signal (48), receive a control signal (70,71) for controlling the generation of the processed data signal (63), apply a controllable delay (46,49) in accordance with the control signal (70,71) to at least one of said non-inverted and inverted data signals (45,48), apply a controllable gain factor (55,56) in accordance with the control signal (70,71) to at least one of said non-inverted and inverted data signals (45,48), and combine the non-inverted and inverted signals after the application of the controllable delay(s) (46,49) and gain factor(s) (55,56) to generate the processed data signal (63) containing pulse shaped pulses which are dispersion tolerant.
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