Laser marker operations
User Manual 113
For the longer pulse profiles (above 20 ns), the pulse shape varies with pulse fre-
quency and Power level. Below the pulse transition frequency (fT), the pulse pro-
file shape will remain invariant, i.e., will not vary with pulse frequency, while
abov
e fT the shape will vary with pulse frequency. Increasing the pulse frequency
and/or decreasing the Power level will make the pulse shape less “leading peak”
like and more “square” like.
The following pictures illustrates for some typical Pulse Profiles, the pulse shape
va
riation in the “Constant Average Power Region” and the “Constant Energy/Peak
Power Region”.
Figure 4: Typical optical output pulse shape in the “Constant Average Power Region” at 200kHz
(left) and the “Constant Energy/Peak Power Region” at 20kHz (right)
If operating below transition frequency (fT), the user can vary the pulse energy
without any other setting change (namely Peak Power) by changing the Pulse
Profile selected.
If operating above transition frequency (fT), the user can vary pulse peak power
wit
hout changing pulse energy by changing the Pulse Profile selected.
To Next Page
Loading...