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Proceedings Paper

Novel in-process sensor for high-power laser profile measurement
Author(s): Heiko Falldorf; Werner P. O. Jueptner; Gerd Sepold
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Paper Abstract

The presented sensor for monitoring a high-power laser beam is based on an extension to a bending mirror in the beam path. The fraction of the light absorbed by the mirror causes a heat flow into the mirror. The laser beam intensity distribution can be determined by a spatial and temporal resolved measurement of this heat flow (or the resulting temperature gradient). A multi-element thermal detector has been applied onto the mirror surface in the form of a thin film system. The structured sensor film has a thickness of about (lambda) /100 and is embedded in the insulating layers. An additional metallic layer leads to a reflective surface. With this sensor beam characteristics, like the beam position, can be determined. Further applications have been mentioned.

Paper Details

Date Published: 22 April 1993
PDF: 11 pages
Proc. SPIE 1834, Laser Energy Distribution Profiles: Measurement and Applications, (22 April 1993); doi: 10.1117/12.143855
Show Author Affiliations
Heiko Falldorf, Bremen Institute of Applied Beam Technology (Germany)
Werner P. O. Jueptner, Bremen Institute of Applied Beam Technology (Germany)
Gerd Sepold, Bremen Institute of Applied Beam Technology (Germany)


Published in SPIE Proceedings Vol. 1834:
Laser Energy Distribution Profiles: Measurement and Applications
James M. Darchuk, Editor(s)

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