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Designing DOEs for real-time analysis of beam mode content

S. V. Karpeev, V. S. Pavelyev, V.A. Soifer

Image Processing Systems Institute of RAS

 PDF, 340 kB

Pages: 84-87.

Full text of article: Russian language.

Abstract:
The real-time analysis of amplitude-phase characteristics of a laser beam is a relevant objective for the experimental physics and for a great number of laser applications, such as laser treatment of materials. The task of analyzing the amplitude-phase beam structure may be treated as a task of analyzing the modal composition, if it is understood as both analyzing individual modal powers and intermodal phase shifts. In this paper, the problem is tackled using a special diffractive optical element (DOE) called MODAN, matched to a group of laser radiation modes. By way of illustration, such an optical element may be implemented as a microrelief applied directly onto an optical material of the laser output window. The experimental results reported indicate that such an approach shows promise.

Citation:
Karpeev SV, Pavelyev VS, Soifer VA. Designing DOEs for real-time analysis of beam mode content. Computer Optics 1999; 19: 84 - 87.

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