Gentec-EO Beamage-M2 - Manual (Page 45)

Beamage-M 2 User Manual Revision 2.0 45
4.7. Overlapping Beams
When manipulating the Y-ADJ and the Z-ADJ screw on the Beamage-M2, it is possible that beams will overlap. To
resolve this problem, you can separate the beams by using the Y-ADJ screw on the Beamage-M2.
Figure 4-11 Overlap Problem solved with Y-ADJ
Beam overlapping is also a sign that the laser beam is not focused enough. Changing the lens with one having a
shorter focal length could resolve this problem.
4.8. Beams are too small (less than 55 μm or 10 pixels)
This could be due to a beam too tightly focused. This problem could be resolved by using a lens with a longer
focal length.
4.9. The minimum beam waist is too far to the left
It is possible that manipulating the Y-ADJ and the Z-ADJ could create a situation like shown below. To resolve
this problem, a Y-ADJ screw adjustment can be made to separate the beams.
Figure 4-12 The Minimum Beam Waist is Too Far to the Left
Another way to resolve this problem is to use the Z-ADJ screw to adjust the distance between the two Fabry-
Perot optics.
It is possible that a compromise will be necessary between the Y-ADJ and the Z-ADJ adjustment.
If a compromise cannot be achieved and the problem persists, it is possible that the laser beam is not focalized
correctly. Changing the lens by one with a smaller focal length could resolve this problem.