Waveguides acclimated at optical frequencies are about dielectric waveguides, structures in which a dielectric actual with top permittivity, and appropriately top basis of refraction, is amidst by a actual with lower permittivity. The anatomy guides optical after-effects by absolute centralized reflection. An archetype of an optical waveguide is optical fiber.
Other types of optical waveguide are aswell used, including photonic-crystal fiber, which guides after-effects by any of several audible mechanisms. Guides in the anatomy of a alveolate tube with a awful cogitating close apparent accept aswell been acclimated as ablaze pipes for beam applications. The close surfaces may be able metal, or may be covered with a multilayer blur that guides ablaze by Bragg absorption (this is a appropriate case of a photonic-crystal fiber). One can aswell use baby prisms about the aqueduct which reflect ablaze via absolute centralized absorption 1—such bonds is necessarily imperfect, however, back absolute centralized absorption can never absolutely adviser ablaze aural a lower-index amount (in the prism case, some ablaze leaks out at the prism corners).
Other types of optical waveguide are aswell used, including photonic-crystal fiber, which guides after-effects by any of several audible mechanisms. Guides in the anatomy of a alveolate tube with a awful cogitating close apparent accept aswell been acclimated as ablaze pipes for beam applications. The close surfaces may be able metal, or may be covered with a multilayer blur that guides ablaze by Bragg absorption (this is a appropriate case of a photonic-crystal fiber). One can aswell use baby prisms about the aqueduct which reflect ablaze via absolute centralized absorption 1—such bonds is necessarily imperfect, however, back absolute centralized absorption can never absolutely adviser ablaze aural a lower-index amount (in the prism case, some ablaze leaks out at the prism corners).
No comments:
Post a Comment