Design of measurement equipment for high power laser beam shapes

K. S. Hansen, F. O. Olsen, Morten Kristiansen, Ole Madsen

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Abstrakt

To analyse advanced high power beam patterns, a method, which is capable of analysing the intensity distribution in 3D is needed. Further a measuring of scattered light in the same system is preferred. This requires a high signal to noise ratio. Such a system can be realised by a CCD-chip implemented in a camera system. Most available CCD-based systems do however suffer from a low maximum intensity threshold. Therefore attenuation is needed. This paper describes the construction of such a beam analysing system where beam
patterns produced by single mode fiber laser on a diffractic optical element can be evaluated using a CCD based camera. The system is tested with various DOE’s for evaluation of efficiency and measurement of scattered light with success. Also tests with capturing beam caustics of focused laser beams from which beam parameters has been fitted and compared with measurements by a
commercial product has been done. The realised system might suffer from some thermal drift at high power; future work is to clarify this.
OriginalsprogEngelsk
TitelProceedings of The 14th Nordic Laser Materials Processing Conference NOLAMP 14
RedaktørerAlexander Kaplan, Hans Engström
ForlagLuleå tekniska universitet
Publikationsdato2013
Sider293-304
ISBN (Trykt)978-91-7439-688-1 (print), 978-91-7439-689-8 (pdf)
ISBN (Elektronisk)Også udgivet på cd
StatusUdgivet - 2013
BegivenhedThe 14th Nordic Laser Materials Processing Conference NOLAMP 14 - Gothenburg, Sverige
Varighed: 26 aug. 201328 aug. 2013

Konference

KonferenceThe 14th Nordic Laser Materials Processing Conference NOLAMP 14
LandSverige
ByGothenburg
Periode26/08/201328/08/2013

Emneord

  • Laser caustic, camera, high power high brightness, laser beam diagnostics

Citationsformater

Hansen, K. S., Olsen, F. O., Kristiansen, M., & Madsen, O. (2013). Design of measurement equipment for high power laser beam shapes. I A. Kaplan, & H. Engström (red.), Proceedings of The 14th Nordic Laser Materials Processing Conference NOLAMP 14 (s. 293-304). Luleå tekniska universitet.