Determination of the ten second order intensity moments

被引：25

作者：

Eppich, B

Gao, C

Weber, H

机构：

[1] Laser & Med Technol GmbH, D-12489 Berlin, Germany

[2] Tech Univ Berlin, Inst Opt, D-10623 Berlin, Germany

来源：

OPTICS AND LASER TECHNOLOGY | 1998年 / 30卷 / 05期

关键词：

first order characterization; second order moments; beam twist;

D O I：

10.1016/S0030-3992(98)00063-2

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The general astigmatic beam can be characterized by its ten second order moments in first order approach. Most intensity moments, except the beam twist, can be determined by measuring the intensity in a reasonable number of positions around the waist of the beam. The beam twist is determined by applying a rotated cylindrical lens. The ten intensity moments of two kinds of astigmatic beam were determined: a simple astigmatic TEM8,0 Hermite-Gaussian beam and a twisted beam generated from the TEM8,0 mode. The experimental results were compared with the theoretical calculations and demonstrate that the ten second order moments of a beam can be determined in a rather simple way. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：337 / 340

页数：4

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