Novel in-process sensor for high-power laser profile measurement

Heiko Falldorf; Werner P. O. Jueptner; Gerd Sepold

doi:10.1117/12.143855

22 April 1993 Novel in-process sensor for high-power laser profile measurement

Heiko Falldorf, Werner P. O. Jueptner, Gerd Sepold

Proceedings Volume 1834, Laser Energy Distribution Profiles: Measurement and Applications; (1993) https://doi.org/10.1117/12.143855
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

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.

Citation Download Citation

Heiko Falldorf, Werner P. O. Jueptner, and Gerd Sepold "Novel in-process sensor for high-power laser profile measurement", Proc. SPIE 1834, Laser Energy Distribution Profiles: Measurement and Applications, (22 April 1993); https://doi.org/10.1117/12.143855

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