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Output Power
Gain (Loss, Insertion Loss)
Insertion Loss Dynamic Range
State of Polarization (SOP)
SOP Uncertainty
Degree of Polarization (DOP)
Keysight N778-C Series Polarization Instruments User's Guide
The power level at the output connector interface.
Insertion Loss (IL) is defined as the difference in the transmitted power,
expressed in dB, between the test device measurement, P
normalization measurement, P
source, calculated as:
The maximum test device loss for which insertion loss measurements can
be performed.
The State of Polarization of a signal is defined by the three normalized
Stokes Parameters s
, s
1
three-dimensional coordinate system. For fully polarized light
(DOP=100%), this point is located on a unity sphere commonly known as
Poincaré sphere.
The SOP uncertainty is defined to be twice the standard deviation of the
angular error on the Poincaré sphere.
The Degree of Polarization is the square-root of the sum of the squared
normalized Stokes Parameters s
0 and 1 or between 0% and 100% accordingly:
, given a constant power of the laser
a
and s
which define a point in a
2
3
, s
and s
. DOP can be a value between
1
2
3
Definition of Terms
3
, and the
b
47
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