Vorteile der Strahlprofilmessung
Vorteile der Strahlprofilmessung
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 Watch the beam profiling video |
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You can get more out of your laser
- Figure 1 shows an industrial Nd: YAG laser, near Gaussian
beam, with 100 Watts output power and 1.5kW/cm2 power
density. Figure 2 is the same Nd: YAG beam at greater
power, 170 Watts, but it split into 2 peaks producing only
1.3kW/cm2 power density. The power density of the beam
decreased 13% instead of increasing by the 70% expected.
Without measuring the beam profile and beam width, you
would not know what happened to your power density, and
why the quality did not improve.
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Laser cavities become misaligned
- Figures 3 & 4 are beam profiles of CO2 lasers used for
ceramic wafer scribing in the same shop. The second laser
with the highly structured beam produced mostly scrap
parts, until the laser cavity was aligned.
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Off axis delivery optics
- Figures 5 & 6 show an industrial Nd:YAG laser with
misaligned turning mirror, before and after adjustment.
Alignment of devices to lenses
- Figures 7 & 8 show beam profiles during alignment of a
collimating lens to a laser diode. The first profile shows
poor alignment of the lens to the diode, which can easily be
improved when seeing the profile in real time.
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Laser amplifier tuning
- Figures 9 & 10 show a Cr:LiSAF femtosecond laser
oscillator beam with a near Gaussian output, and what
happens to the oscillator beam with poor input alignment.
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Measuring beam profiles improves your accuracy
- Measurement of the beam profile is needed to know if
problems exist, and the profile must be seen to make
corrections.
- Most laser processes can be improved,
- Scientific experiments can be more accurate,
- Commercial instruments can be better aligned,
- Military devices can have greater effectiveness,
- Industrial processing produces less scrap,
- Medical applications are more precise.
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| Just knowing the beam profile can make the difference
between success and failure of a process. |
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