How to Perform a Wavelength Sweep Tunable Lasers
Agilent 8163A Lightwave Multimeter, Agilent 8164A Lightwave Measurement System, & Agilent 8166A Lightwave
Multichannel System, Fourth Edition
113
How to Set the Wavelength Sweep
The Sweep Parameters
These are the parameters for the wavelength sweep:
• [λ Start], the wavelength at which the sweep begins,
• [λ Stop], the wavelength at which the sweep ends,
• [Step], the size of the change in the wavelength for each step of a stepped
sweep,
• [Cycles], the number of times the sweep is repeated,
• [Dwell], the amount of time spent at the wavelength during each step, for a
stepped sweep
• [Vsweep], the speed of a continuous sweep,
• [Sweep mode], see “How to Perform a Sweep” on page 114,
• [Repeat mode], see “How to Set the Repeat Mode” on page 113.
NOTE For a <Continuous> sweep, [Step] sets the wavelength interval between output
triggers, if you have set <Output Trigger Mode> to <Step Finished>, see “How to
Use Output Triggering” on page 126.
How to Set the Repeat Mode
The [Repeat Mode] determines how the instrument performs a multi-cycle sweep.
• Select <Twoway>, if you want to start every odd sweep cycle at [λ Start] and
to start each even sweep cycle at [λ Stop].
• Select <Oneway>, if you want to start every sweep cycle at
[λ Start] and to end every sweep cycle at [λ Stop].
Figure 72 The Parameters for a Stepped Wavelength Sweep
Sweep Cycles = 1
λ
t
λ
Stop
Dwell
Step
λ
Start
Time
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