Methods for determining optical properties of optical waveguide

Details Methods for determining optical properties of optical waveguide Methods for determining optical properties of optical waveguide

1993-12-30

1995-12-26

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

G01N 2159, G01N 2188

Patent

active

054792517

ABSTRACT:
Methods for determining optical properties of an optical waveguide fiber using an optical time domain reflectometer (OTDR) are provided. The methods involve the removal of noise from an OTDR trace (signal) by fitting the noise component of the signal and then subtracting the fitted noise from the original signal to produce a noise-reduced signal. Optical properties are more readily determined from the noise-reduced signal than from the original signal. In particular, the noise-reduced signal can be used to determine axial optical properties of long fibers, e.g., fibers having a length of 50 kilometers or more.

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