Pulse method for measurement of relative secondary path intensit

Details Pulse method for measurement of relative secondary path intensit Pulse method for measurement of relative secondary path intensit

1995-12-27

1997-04-01

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

G01N 2188

Patent

active

056172001

ABSTRACT:
A method for measuring the secondary path intensity of an optical unit, such as an optical amplifier, is provided. The method includes applying a pulse of light to a first end of the unit and detecting the light exiting from the second end of the unit. The exiting light is analyzed to determine a primary pulse intensity and a secondary pulse intensity which preferably includes the effects of Rayleigh backscattering (RBS). The ratio of the secondary pulse intensity to the primary pulse intensity provides an accurate measure of the unit's secondary path intensity.

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