FASTLITE DAZZLER - Effects of Incorrect Trigger Settings; The Trig&Mode Panel; Left: Acoustic Wave Position in the Crystal When the Optical Wave Propagates through the Crystal (Acoustic Wave Unclipped), Right: Equivalent Spectrum and Time Graphs; Incorrect Trigger Settings: Trigger Delay too Short

DAZZLER
TM
system manual Part I : installation & operation 4.2
Figure 4.2: Left: acoustic wave position in the crystal when the optical wave propagates through
the crystal (acoustic wave unclipped), Right: Equivalent spectrum and time graphs
4.1.3 Effects of incorrect trigger settings
When Trigger to Laser is greater than the optimum value (Figure 4.3), or more exactly when
Trigger Delay is set too short
5
, the optical pulse occurs when the trailing part of the acoustic
wave is present in the crystal: the wave was launched too early, hence its leading part is missing.
Figure 4.3: Incorrect trigger settings: Trigger Delay too short
When Trigger Delay is set too long, the acoustic wave is not yet entirely in the crystal when
the light pulse arrives. The trailing part of the wave is missing.
4.2 The Trig&Mode panel
The Dazzler
TM
software provides a user-friendly interface to enter the delays T
p
, TXtal, Trigger
to Laser, Trigger Delay correctly based on experiment parameters.
Before opening the Trig&Mode panel, check that the single mode operation is selected on the
software front panel (one RF cycle is started by one external trigger, see subsection 5.1.7).
The Trig&Mode panel opens by clicking on menu “setup → trig and mode”.
5
Trigger to Laser depends of the laser construction and is a “given” system constant while Trigger Delay
can be adjusted
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