| 摘要 |
An optical switch useful in thin-film electro-optic light guides relies on an induced stationary diffraction grating. The grating is produced by an interdigital electrode structure which is deposited on the electro-optic guide. The application of a voltage to the electrode pattern produces a spatial modulation of the refractive index of the guide which acts as a diffraction grating to light traveling in the guide. This grating causes light in the guide to be diffracted out of the guide, thereby stopping transmission. Removal of the voltage eliminates the grating and restores transmission.
|
