Optimized high power laser mirror design for low quality degradation and beam analysis
✍ Scribed by F. Ach; W. Viöl
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 176 KB
- Volume
- 2
- Category
- Article
- ISSN
- 1612-2011
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✦ Synopsis
The thermally induced deformation of different copper
mirrors for infrared laser beams was simulated using a finite
element method. The deformation is highly dependent on the mirror
design. Several mirror designs with different cooling arrangements
have been simulated.
A mirror design with a set of
straight cooling channels and a stiff body shows the least
deformation. The cooling channel diameter, spacing, surface
distance and overall mirror thickness were varied at this design
and the surface deformation was compared. The mirror design not
only influences the overall expansion of the mirror but also the
shape of the surface deformation.
The optimized mirror
geometry provides small quality degradation at beam guidance and
the possibility of an online beam monitoring method by measurement
of the local surface deformation. The method can serve as a device
for online and beam position detection.