| 摘要 |
<p>The present invention provides an optic filter having first (12) and second (14) sets of alternating layers of material, where each set of alternating layers of material has a first dielectric material and a second dielectric material stacked upon each other. Further, the first and second dielectric materials have different indices of refraction. The optic filter of the present invention also includes an intermediate material (20) disposed between the first and second sets of alternating layers. The intermediate material has an index of refraction that varies as a function of the intensity of an electric field applied thereto. Additionally, the first set of alternating layers is connected to a transparent substrate (24). In operation, to filter an optic signal of interest, the composition, thickness, and number of first and second dielectric layers are chosen to filter or reflect the desired wavelengths of the optic signal. The optic signal is then directed incident to the optic filter and an electrical field is applied to the intermediate layer of the optic filter. The introduction of the electrical field causes a change in the index of refraction of the intermediate material of the optic filter, thereby causing the optic filter to either transmit or reflect the wavelengths of interests in the optic signal.</p> |
