Agilent Technologies 86038B, User Manual

Page: 143 / 350

Agilent 86038B Photonic Dispersion and Loss Analyzer, Second Edition
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5 Set Measurement Type, Range and Port(s)
Next, the PDLA needs to be configured for the measurement
that you want to make. Set up the measurement before doing the
normalization so that the normalization will cover the
measurement conditions. If you have several measurements to
make, you may wish to manually configure the normalization
wavelength range to cover all of the measurements. In this case,
you would defer this step until after normalization.
A sample configuration setting up for a swept CD and Gain
measurement from 1535 to 1545 nm on Port 1 might look like:
pdlaClient.MeasurementRange.XStart = 1535
pdlaClient.MeasurementRange.XStop = 1545
pdlaClient.DispersionMode = eDispersionMode_CD_Swept
pdlaClient.Ports = ePortsEnabled_Port_1_Enabled
The start and stop wavelength is set in nm. Since a swept mode
was chosen, you may want to specify the increment:
pdlaClient.Resolution.Increment=0.01
There are four different measurement modes, the same choices
you get on the CD/PMD front panel setup menu:
The above example sets a step of 0.01 nm. This would set 1001
trace points for the requested 10 nm sweep (1535 to 1545 nm).
You can activate port 1, port 2, or both:
If your setup supports multiport measurements, you can
activate single ports:
eODAPort_One Or eODAPort_Two Or ...
Table 5-3. Measurement Modes
eDispersionMode_CD_Swept Measure Gain, Relative Group Delay, and Chromatic Dispersion with the
tunable laser sweeping across the specified wavelengths.
eDispersionMode_CD_Stepped Measure Gain, Relative Group Delay, and Chromatic Dispersion with the
tunable laser stepping across the specified wavelengths.
eDispersionMode_CD_PMD_Steppe
d Measure Gain, Relative Group Delay, Differential Group Delay,
Chromatic Dispersion, Polarization Dependant Loss and second Order
PMD properties with the tunable laser stepping across the specified
wavelengths.
eDispersionMode_CD_PMD_Swept Measure Gain, Relative Group Delay, Differential Group Delay,
Chromatic Dispersion, Polarization Dependant Loss and second Order
PMD properties with the tunable laser sweeping across the specified
wavelengths.