DAZZLER
TM
system manual Part I : installation & operation
1.1
the phase and the amplitude distortions of the beam.
For proper operation, the acoustic and optical beams must be aligned and the acoustic wave
has to be synchronized with the optical pulse: for details, see
and
IMPORTANT
Note that the damage threshold of the crystal is 100Mwatt/cm
2
for ns pulses
or
30
µ
J/pulse for sub-ps pulses with 2.5 mm input beam diameter. The crystal may be damaged
if a high-power optical beam is injected. Also note that the crystal warranty is void if you remove
its cover.
1.1.2
RF generator
The RF generator is the electronic unit which translates the signal digital definition in the
computer into the analog high power RF electrical signal driving the crystal. It also provides
essential ancillary signals for interfacing with the laser system, such as the synchronization of
the optical and acoustic waveforms (triggering process) and other functions that cannot be
handled by the computer.
The generator produces a sampled arbitrary waveform signal. The signal repeats periodically
when the unit is programmed in the ”continuous” mode and is generated only once for each
trigger signal in the ”single” mode.
On the front panel
trigger
and
aux
are inputs controlling the generation process.
The rear panel BNC outputs
S1, S2, S3
and
S4
are used for driving data acquisition & control
equipment, control and as well as monitoring signal with an oscilloscope for troubleshooting. A
detailed description of the front and rear panel signals can be found in
while
describes the six front panel LED indicators.
trigger
aux
RF GENERATOR simplified schematic
ExtClockRef
S1
S2
S4
S3
logic &
waveform memories
clock
generator
USB2 interface
&
microprocessor
I/O buffers
in
in
in
a
na
lo
g
fil
te
r
RF OUT
RF
power
amp.
Digital to
Analog
Conversion
Figure 1.1: Simplified schematic of the RF generator
V3.00 - 8
th
April 2019
