Geometrical parameters of an Optical fiber

Geometrical parameters of an Optical fiber

Core
The central region of an optical fiber through which most of the optical power is transmitted. It is characterized by a refractive index, which is higher than that of the surrounding cladding. The core diameter is often determined by the near field measurement technique.

Cladding
The layer of dielectric material surrounding the core.

Cladding Mode Stripper
A device that encourages the conversion of cladding modes to radiation modes.

Cladding Surface Centre
For a cross section of an optical fiber, it is the position of the circle which best fits the focus of the cladding surface in the given cross section.
The best fit method has to be specified.
Cladding Surface Diameter
The diameter of the circle defining the cladding centre.

For normally circular fiber, the cladding surface diameter in any orientation of the cross section is the largest distance across the cladding
Non-Circularity of the Cladding Surface
The difference between the maximum cladding surface diameter Dmax and minimum cladding surface diameter D min ( with respect to the common cladding surface centre) divided by the nominal cladding diameter D.

0 comments:

Post a Comment

SEARCH

Custom Search