| 摘要 |
An optical attenuator to be used in a fiber optic communication system, includes a waveguide system formed in a crystal substrate, including an input channel for receiving an optical input, a first output branch with a first width, and a second output branch with a second width; electrodes for selectively applying electric fields of opposite directions to the first and second output branches, respectively, wherein the first width and the second width are sufficiently different so that 100 % of the optic input goes through one of the first and second output branches when no electric fields are applied by the electrodes.
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