Method of measuring the refractive index profile of optical...

Details Method of measuring the refractive index profile of optical... Method of measuring the refractive index profile of optical...

G - Physics

01

M

354/29, 73/53

G01M 11/00 (2006.01) G01N 21/41 (2006.01)

Patent

CA 1286403

Abstract: The present invention is directed to a method for determining the refractive index profile of an optical fiber wherein light from an intense optical source is focused at the bare fiber end portion of the test fiber. A small amount of light will be coupled into the optical fiber where for the short length of uncoated fiber only cladding modes are excited. The index of refraction is determined directly by analyzing the intensity distribution emitted from the optical fiber with a lens system having a limited numerical aperture.

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