User`s guide

Performance Test Instructions Performance Tests
Agilent 81560A, 81561A, 81566A, & 81567A Optical Attenuator Modules, First Edition 49
Polarization Dependent Loss (PDL) Test - Scanning
method
Carry out the following PDL Test at 1550 nm with single mode fibers
using the equipment listed in Table 3, “Equipment Required,” on
page 41. To adapt for the straight or angled contact versions of the
attenuator use the patchcords with appropriate connectors and the
adequate connector interfaces.
NOTE: This test method is recommended if the fiber-loop type 11869A
Polarization Controller is used. If the plate-type 8169A Polarization
Controller is used, refer to “Polarization Dependent Loss (PDL) Test -
Mueller Method” on page 50.
1 Turn the instruments on and allow the devices to warm up (20..30
min).
2 Make sure that all your connectors are clean and undamaged.
3 Connect the equipment as shown in Figure 14
Figure 14 PDL Test Setup - Scanning Method
NOTE The patchcords from and to the polarization controller and the
attenuator must not move during and between all measurements. Use
tape to fix the fibers on the table.
4 Set the attenuator to the wavelength of the laser source.
5 Enable the laser source and open the shutter of the attenuator.
6 Display [dB] at the power meter and set Display to Reference.
7 Choose the power meter Stability Application and set parameters:
• Total Time = 25 seconds
• Averaging Time = 50ms
8163A 8163A
11896A