User`s guide

Performance Tests Performance Tests
60 Agilent 81618A/9A and Agilent 81623B/4B/6B/8B Optical Heads, Fourth Edition
Relative Uncertainty due to Polarization
(Optional Test)
Refer to Figure 13 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.
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.
NOTE