| 摘要 |
An optical isolator is constructed using a pair of rotating half-wave plates as the active elements. In a first embodiment, the rotating half-wave plates are arranged in series between a pair of linear polarizers, the spacing between the plates being adjusted to pass light travelling in one direction but not in the opposite direction. In a second embodiment, a Fabry-Perot interferometer is positioned between two rotating half-wave plates so as to pass circularly polarized light travelling in one direction but not in the opposite direction.
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