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The same setup can be
used for the standard
coupler test.
Figure 2-5
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Taking Polarization Dependent Measurements
Measuring the Polarization Dependent Characteristics of
Couplers
1 Connect the optical output to input no. 1 of the device under test
(DUT).
2 Connect optical head A to output no. 1 of the DUT.
3 Connect optical head B to output no. 2 of the DUT.
4 Activate the optical output.
If you use the internal light source, press S
turn the source on. The source indicator lamp must be lit.
If you have connected an external light source to the optical
input, press S
source indicator lamp must be off.
Starting the Measurement
1 Press A
to activate the "Select Applications" menu.
PPL
2 Choose "PD Coupler Test".
The first page of the polarization dependent coupler test is
displayed.
3 Wait until the results are displayed.
The OLA immediately starts to measure. Depending on the PDL
value, the instrument automatically chooses the right amount of
samples to achieve the specified accuracy. The bargraph at the
bottom of the display shows the measurement in progress. The
larger the PDL value of the DUT is, the longer the measurement
takes.
Polarization Dependent Coupler Test Display, Page 1
47
O
/O
to turn the internal source off. The
OURCE
N
FF
O
/O
to
OURCE
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