| 摘要 |
A method for externally modulating an optical carrier wave by propagating the wave through a single channel waveguide structured to have an output whose optical power in the near field is distributed in a predetermined spatial pattern, selectively changing the optical power distribution pattern in correspondence with an information signal, and spatially filtering the power distribution pattern so that only the power available within selected region of the pattern is transmitted beyond the point of spatial filtering where it is available as an optical carrier wave whose intensity is modulated in correspondence with the information signal.
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