CHAPTER
3
SOFTWARE OVERVIEW
The main part of the DazScope system is an elaborate software that remotely controls the Dazzler
pulse shaper to optimize the spectral phase (i.e. make it linear with frequency).
3.1
Quick start
This section gives a rapid overview to be able to carry a first optimization as explained in the next
chapter.
At startup, an initialization window of the spectrometer opens (figure
). If the spectrometer
is not connected, the software will automatically switch to the simulation mode. Otherwise, the
spectrometer reference number will be displayed in the initialization window.
The spectrometer settings can be modified by clicking on the
Spectrometer
menu and selecting
the
Configure
item. This will open a configuration window (figure
). Adjust the spectral range
to the spectral width of the pulses to be characterized
. When the
Advanced Mode
checkbox is
checked, an extended window appears. The trigger settings can be modified from this window.
When finished, click on ok.
The SHG spectrum can now be recorded directly from the main window: select the
Spectrum
item in the algorithm list and click on the run button. The recorded spectrum is shown in the top
graph. A chart of past SHG levels is displayed in the bottom figure. Optimize the second harmonic
spectrum level by properly aligning the optical setup. To stop the spectrum measurement click on
the
Run
button once again.
Then start the first optimization: select the
ChirpScan
item in the
Algorithm
list and click
on
Run
At the end of each chirp scan, a window indicating the result of the measurement will appear.
1
Three to four times the FWHM spectral width is a good rule of thumb.
13
