DAZZLER
TM
system manual Part I : installation & operation 3.3
Ultrafast laser
Optical Parametric Amplifier
Dazzler crystal unit
Experiment
t
25fs @ 800nm
t
25fs @ 750nm
t
25fs @ 750nm
Example of arbitrary pulse shaping :
sequence of 25fs pulses
Figure 3.2: Setup of an OPA with a Dazzler
Diffracted beam Polarization : parallel to plane (P)
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p
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t
d
i
r
e
c
t
i
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Tr
an
s
m
itt
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be
a
m
P
z
y
x
Input beam Polarization : perpendicular () to plane (P)
Figure 3.3: Dazzler crystal installation
the plane of diffraction. The z axis is perpendicular to the input face and is the direction of
the input optical beam. The y direction is perpendicular to z and in the plane of diffraction.
The x direction is perpendicular to the plane of diffraction. Note that while the input beam is
polarized perpendicularly to the diffraction plane, the diffracted beam is polarized parallel to
the diffraction plane. Make sure that the output polarization fits your laser setup.
For proper operation, the input optical beam has to be aligned with the acoustic axis (Fig-
ure 3.4). For a precise alignment, the crystal should be mounted so as to have rotational
control to align the input beam perpendicular to the input face with about 1 mRad accuracy
and translation controls along the x and y directions (0.1 mm accuracy).
First translate the Dazzler crystal to position the beam as described on Figure 3.5. Rotate the
crystal to align the input beam perpendicular to the input face (autocollimation from the input
face).
V3.00 - 8
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April 2019 (ContentsTable) (FiguresTable) 19/94
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