| 摘要 |
A TDM comprising: (a) at least two wavelength-tunable devices for outputting a signal, each wavelength-tunable device being adapted to change signal wavelength in response to a change signal; (b) a plurality of on-off gates, one on-off gate being coupled to the output of each wavelength-tunable device such that, when a gate is on, the signal of its respective wavelength-tunable device passes through, and, when it is off, the signal of its respective wavelength-tunable device does not pass through, the gates being configured such that a gate is switched off when its respective wavelength-tunable device receives a change signal, and, when one gate is turned off, another gate is turned on; and (c) a combiner coupled to the outputs of all the gates for combining the outputs on a single transmission line.
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