Measuring The Insertion Loss - Agilent Technologies HP E5574A User Manual

Taking Standard Loss Measurements

Measuring the Insertion Loss

3.1 Measuring the Insertion Loss
This section covers the use of the application "Insertion Loss" to
measure the ratio of the optical power emerging from a device to
the power launched into that device.
Note: The attenuation of polarized light usually differs from the
attenuation of unpolarized light. However, you can measure the
same averaged Insertion Loss as with an unpolarized source even
with the internal source. This is accomplished by using the
application "PDL / Ins. Loss" (see section 2.1 "Measuring
Polarization Dependent Loss" on page 41).
ATTEN TIO N Before you measure the Insertion Loss, you must
at least measure and store the reference power P ref. If you have not
yet stored the reference power, refer to page 31 in section 1.6
"Getting Started".
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