Metric for the measurement of the quality of complex beams: a theoretical study

    Authors

    S. Kaim; J. Lumeau; V. Smirnov; B. Zeldovich;L. Glebov

    Comments

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    Abbreviated Journal Title

    J. Opt. Soc. Am. A-Opt. Image Sci. Vis.

    Keywords

    Optics

    Abstract

    We present a theoretical study of various definitions of laser beam width in a given cross section. Quality of the beam is characterized by dimensionless beam propagation products (BPPs) Delta x . Delta theta(x)/lambda, which are different for the 21 definitions presented, but are close to 1. Six particular beams are studied in detail. In the process, we had to review the properties for the Fourier transform of various modifications and the relationships between them: physical Fourier transform (PFT), mathematical Fourier transform (MFT), and discrete Fourier transform (DFT). We found an axially symmetric self-MFT function, which may be useful for descriptions of diffraction-quality beams. In the appendices, we illustrate the thesis "the Fourier transform lives on the singularities of the original." (C) 2015 Optical Society of America

    Journal Title

    Journal of the Optical Society of America a-Optics Image Science and Vision

    Volume

    32

    Issue/Number

    4

    Publication Date

    1-1-2015

    Document Type

    Article

    Language

    English

    First Page

    538

    Last Page

    548

    WOS Identifier

    WOS:000352209700006

    ISSN

    1084-7529

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