DazScope
manual
Chapter C : Dazzler alignment and calibration
Figure C.2: Short Acoustic Pulse and Typical Oscilloscope Measure
Figure C.3: Example of Spectrum With Hole
The ratio of optical to acoustic frequencies is sensitive to this angle allowing adjustment of the
calibration.
C.3
Diffraction efficiency
Put the detection diode on the direct beam (A position). Use an amplitude spectrum with a width
of 100
nm
. Extend the signal to cover the full range of delays, by adjusting the second order phase
coefficient. Use the full power.
Observe the drop of signal on the scope. The maximum drop should be at least 50% for a laser
source of bandwidth smaller than 100
nm
.
FASTLITE-9 september 2008
