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Figure 3
Positive splice (A ->B) / Negative Splice (B -> A)
The sum gives the bi-directional or average splice loss value:
Bi-directionnal measurement consists in performing a measurement from the extremity
of fiber A, then another measurement from the extremity of fiber B, finally get events of
both traces and calculate the average for all slope, splice and reflectance measure-
ments.
Principle of the optical power and attenuation
measurements
Power measurement
A power meter, is all that is needed to measure emitted or received power:
•
to measure emitted power, connect the power meter directly to the output of the
optical emitter;
•
to measure the power at the input of an optical receiver, the power meter is
connected to the end of the fiber, at the point where the optical receiver would be
connected.
Attenuation measurements (optical link loss)
For measurement of the attenuation of power in a complete link or in elements such as
sections of fiber, connections or optical components, a light source and a power meter
are required.
This attenuation is usually deduced from the measurement of optical power at two
points:
Principle of the optical power and attenuation measurements
User Manual
Chapter 1 Principles of measurement
78000010220 Rev. 024
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