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Laser beam characterization by means of diffractive optical correlation filters

V.S. Pavelyev, V.A. Soifer, M. Duparre*, B. Luedge*

Image Processing Systems Institute, Russian Academy of Sciences, Samara, Russia

*Institute for Applied Optics, Univ. of Jena, D-07743 Jena, Germany

 PDF, 506 kB

Pages: 56-59.

Full text of article: English language.

Abstract:
Analyzing of amplitude-phase characteristics of laser beam is topical in experimental physics and in a great number of laser applications, such as, for example, laser material treatment. The task of analyzing the amplitude-phase beam structure may be treated as that of analyzing the modal composition, if this is thought of as both analyzing individual modal powers and intermode 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 and their special combinations. The experimental results reported indicate that such an approach shows promise.

Key words:
laser beam, Gaussian modes, intermode power distribution, intermode phase shifts.

Citation:
Pavelyev VS, Soifer VA, Duparre M, Luedge B. Laser beam characterization by means of diffractive optical correlation filters. Computer Optics 2000; 20: 56 - 59.

References:

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