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TOPAG Lasertechnik GmbH
Nieder-Ramstädter Str. 247
64285 Darmstadt
Telefon: +49 6151 4259 78
Telefax: +49 6151 4259 88 
E- mail: info [at] topag.de 

DBM - Beam Sampler

489
DBM - Diffractive Beam Sampler for Monitoring

Beam Sampler

Beam Samplers split two beams away from the main laser beam. The physical behavior of these two beams is identical to the main beam. Thus, the two beams can be used very well for online monitoring.

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Bezeichnungen der Tabs

  • Description
  • Specifications
  • Table
  • Scheme
Tab 1

In the opposite of ordinary beam splitters, the Beam Samplers diffract a small fraction (typical < 1%) of the input beam energy into higher diffraction orders (±1st order). The bulk (typical > 99%) of the input energy remains in the main beam and can be used for laser process as before. The +1st and -1st order can be used as input beam for example for measurement of power/power stability, beam profilers, M² measurement or autocorrelators.


Beam Samplers are available with different separation angles between the main beam and the two separated beams. The ratio of light (main beam to the two separated beams) can be adapted to the requirements of the measurement.

Tab 2
Parameters
Ratio of light in the main beam (zero order) typical > 99%
Ratio of light in each of the two separated beams (±1st order) < 0.5%, < 0.25%, < 0.1%, < 0.05%
Diffraction angle (between zero and ±1st order) see table
Wavelenght see table
Material UVFS
Dimensions dia. 25.4mm, thickness 3mm
Active area dia. 23mm
Incl. AR/AR coating
Model No.: DBM-wavelength-separation angle-Power in +1st order

 

Tab 3

 

Separation between main beam and 1st order beam according to the wavelength
Wavelength 1064nm 1030nm 800nm 532nm 515nm 355nm 343nm
  2.29° 2.22° 1.72° 1.15° 1.11° 0.76° 0.74°
  5.09° 4.92° 3.82° 2.54° 2.46° 1.70° 1.64°
  10.21° 9.88° 7.66° 5.09° 4.92° 3.39° 3.28°
  20.77° 20.08° 15.47° 10.21° 9.88° 6.80° 6.57°
Other wavelengths, separation angles and/or ratios of separation on request

 

Tab 4

Tab 4 Inhalt

Tab 5
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 BeamSampler3
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Principle operation scheme
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