Keysight N778xC Series Polarization Instruments User’s Guide 47
Definition of Terms 3
Output Power
The power level at the output connector interface.
Gain (Loss, Insertion Loss)
Insertion Loss (IL) is defined as the difference in the transmitted power,
expressed in dB, between the test device measurement, P
b
, and the
normalization measurement, P
a
, given a constant power of the laser
source, calculated as:
Insertion Loss Dynamic Range
The maximum test device loss for which insertion loss measurements can
be performed.
State of Polarization (SOP)
The State of Polarization of a signal is defined by the three normalized
Stokes Parameters s
1
, s
2
and s
3
which define a point in a
three-dimensional coordinate system. For fully polarized light
(DOP=100%), this point is located on a unity sphere commonly known as
Poincaré sphere.
SOP Uncertainty
The SOP uncertainty is defined to be twice the standard deviation of the
angular error on the Poincaré sphere.
Degree of Polarization (DOP)
The Degree of Polarization is the square-root of the sum of the squared
normalized Stokes Parameters s
1
, s
2
and s
3
. DOP can be a value between
0 and 1 or between 0% and 100% accordingly:
To Next Page
Loading...
