Atec Agilent-81618A - Manual (Page 57)

Performance Tests Performance Tests
Agilent 81618A/9A and Agilent 81622B/3B/4B/6B/7B/8B User’s Guide, Second Edition
57
Relative Uncertainty due to Polarization
(Optional Test)
N O T E The performance test "Relative Uncertainty due to Polarization" is
optional, since the polarization is given with the production of the unit
by mechanical and optical cavities and is unchanged by normal use of
the sensor module.
Refer to Figure 15 for a setup to verify the relative uncertainty due to
polarization of the sensor module.
Generally, during this measurement procedure the tunable laser
source is swept through a predefined wavelength range. After every
wavelength step, a single PDL -measurement is made, where the
polarization controller generates all the different polarization states.
The highest PDL value is taken as the "relative uncertainty due to
polarization". The low output power path of the coupler is used to
monitor the power stability of the setup.