From 'Absorption' to 'Zing Fiber', the Fiberpaedia™ provides a concise collection of explanations and definitions of some of the most important fiber optic concepts and parameters - all resourced in alphabetically order for ease of reference.
When a fiber absorbs, less power will be seen at the output than was put into the fiber. Absorption is any mechanism by which the material takes energy into its structure.
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The acceptance angle θa is the maximum angle to the core at which light will go into the fiber. .
A material associated with an output gain. Any material that has a dynamic response to light can be regarded as an active medium.
Silica (pure SiO2) can be doped with aluminium (Al), mostly as alumina (Al2O3), for several reasons.
Atoms in an excited state will spontaneously emit photons when they fall back to their lower, or ground state.
A device which introduces gain into a signal passing through it. In fiber optics amplifiers can be made with active fiber.
The end face of a connector polish may be finished at an angle; so that the reflection angle of light moving out of the core from the fiber end face exceeds the acceptance angle of the fiber
When a fiber attenuates less power will be seen at the output than was put into the fiber.
The loss attributed to the material. It is often dominated by Rayleigh scattering – though this depends on the wavelength concerned.
Light in the fast and slow axes travels at slightly different speeds, and so when a laser source is interfered together in the fiber it will fall in and out of phase at regular intervals, the beat length, along the fiber.
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