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Performance Tests
Test 3. Polarization Dependence
Test 3. Polarization Dependence
Description
Polarization Dependence is verified using the following devices:
• 1310 nm and 1550 nm DFB lasers
• Optical attenuator
• Agilent 11896A Polarization Controller
CAUTION
Do not exceed +18 dBm source power. The Agilent 86120B’s input circuitry can
be damaged when total input power exceeds 18 dBm.
Procedure
Perform the following procedure first using the 1310 nm laser and then repeat
the steps using the 1550 nm laser.
1
Turn on the lasers and allow them to warm up.
2
Set the polarization controller to a scan rate of 5.
3
On the Agilent 86120B, press the
Preset
key.
4
Connect the laser’s optical output to the polarization controller’s optical input.
5
Connect the polarization controller’s optical output to the Agilent 86120B
being tested.
6
Set the polarization controller to autoscan.
7
On the Agilent 86120B, press
Peak WL
,
Appl’s
, and then
DRIFT
. Press
MAX-MIN
so
that both
MAX
and
MIN
in the softkey label are highlighted. The display shows
the total drift since the drift measurement was started.
8
Wait five minutes, read the peak amplitude drift from the Agilent 86120B, and
compare with the specification listed in Chapter 7, “Specifications and
Regulatory Information”.