Determination of the ten second order intensity moments

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 appl...

Full description

Saved in:
Bibliographic Details
Published in:Optics and laser technology 1998-07, Vol.30 (5), p.337-340
Main Authors: Eppich, B., Gao, C., Weber, H.
Format: Article
Language:English
Subjects:
Beam twist
Exact sciences and technology
First order characterization
Fundamental areas of phenomenology (including applications)
General laser theory
Lasers
Optics
Physics
Second order moments
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 TEM 8,0 Hermite–Gaussian beam and a twisted beam generated from the TEM 8,0 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.
ISSN:0030-3992
1879-2545
DOI:10.1016/S0030-3992(98)00063-2