EXFO T200S, User Manual, Page: 37 / 146

Setting the Emission Wavelength/Frequency
Tunable Laser Source
31
Performing a Sweep Sequence
To configure the sweep sequence:
1.
In the task bar, select the SWEEP mode in the drop-down list.
2. In the SWEEP mode window, touch the button.
The Sweep mode settings menu appears.
3. In the
Sweep parameters
area, configure the sweep as explained in the following
table:
Parameter Description
Start
/
Stop
wavelength
/
frequency
Sweeping range of the laser during sweep.
At start of the sweep, the laser is automatically positioned at
the start value and moves to the stop value.
Cycles
Number of sweeps you want the laser to perform.
If you enter 0, the laser sweeps indefinitely until you touch the
Stop button.
Pause Duration of the pause time at the end of each sweep.
Speed Maximum speed at which the laser sweeps the defined
wavelength/frequency range.
The entire wavelength/frequency range is not swept at the
speed you select here: the laser first accelerates to reach the
selected speed, and decelerates before reaching the stop
wavelength/frequency. If the span is too short for the selected
speed, maximum speed will not be reached.
For example, the laser needs approximately 10 nm to reach
200 nm/s.