Tunable Lasers How to Perform a Wavelength Sweep
114 Agilent 8163A Lightwave Multimeter, Agilent 8164A Lightwave Measurement
System, & Agilent 8166A Lightwave Multichannel System, Fourth Edition
Figure 73 illustrates how these modes work for a three-cycle wavelength sweep.
How to Set the Maximum Power for the Sweep Range
Pressing [Pmax/Swp] sets the power to the maximum for the selected sweep
range. Alternatively, you can set a power level in the way described in “How to
Set the Output Power of a CW Signal” on page 104. Pressing [Pmax/Swp]
ensures the power will be constant for the whole sweep.
How to Perform a Sweep
There are three sweep modes:
• <Stepped>, which dwells at wavelengths that are separated by a certain step
size,
• <Continuous>, which sweeps continually at the speed you set, and
• <Manual>, which you can run each step manually.
NOTE You cannot turn the laser off by pressing the Active hardkey on the Tunable Laser
front panel, while a wavelength sweep is running.
You can press [Stop] and, then, press the Active hardkey on the Tunable Laser
front panel, to turn off the laser.
How to Execute a Stepped Sweep
To execute a stepped wavelength sweep over the range 1510 nm to 1570 nm,
three times, sweeping two ways, in 1 nm steps, stopping for half a second at each
wavelength step:
1 Move to the Tunable Laser channel and press [Details].
2 Move to [Sweep Mode] and press Enter.
3 Move to the <Stepped> sweep mode and press Enter.
4 Move to [λ Start] and press Enter.
5 Enter 1510.000 and press Enter.
Figure 73 Repeat Modes
λ
t
t
λ Start
λ Stop
λ
λ Start
λ Stop
<Twoway><Oneway>
123 123
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