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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
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.
N O T E
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
>
1
2
3
1
2
3