In an early step in the fabrication of these devices, a preform is created by chemical vapor deposition of silicon tetrachloride and germanium tetrachloride.
In an early step in the fabrication of these devices, a preform is created by chemical vapor deposition of silicon tetrachloride and germanium tetrachloride. When doped with erbium, these devices can be used to amplify signals by transitions from the J-equals-15-over-2 state to the J-equals-13-over-2 state. Types of these devices with a step-index profile become single-mode at a V-number of less than 2.405. These devices can be described by their numerical aperture, which relates the indices of refraction of the cladding and the core. For 10 points, name these optical waveguides, usually made of glass, in which total internal reflection allows light to propagate over long distances.
In an early step in the fabrication of these devices, a preform is created by chemical vapor deposition of silicon tetrachloride and germanium tetrachloride.
optical fibers [accept fiber optics; prompt on waveguides until read; prompt on fibers until "optical" is read, but accept it thereafter] &lt;Rombro&gt;