Focal squeeze in axicons

    Authors

    C. J. Zapata-Rodriguez;F. E. Hernandez

    Comments

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    Abbreviated Journal Title

    Opt. Commun.

    Keywords

    diffraction; wave propagation; TRAVELING NONDIFFRACTING BEAMS; EFFECTIVE FRESNEL-NUMBER; BESSEL BEAMS; 2ND-HARMONIC GENERATION; GAUSSIAN BEAMS; SHIFT; INTERFERENCE; WAVES; EFFICIENCY; DEBYE; Optics

    Abstract

    The on-axis irradiance distribution of a truncated conical wavefront is evaluated in terms of the Fresnel number of the focusing geometry. In agreement with geometrical optics, a focal line of increasing intensity is generated for extremely high Fresnel numbers. Otherwise clear deviations may be observed for the position of the maximum irradiance along the optical axis. A remarkable focal squeeze appears and, for decreasing Fresnel numbers, this effect manifests stronger. An analytical formula is provided for the fast evaluation of the focal squeeze. (c) 2005 Elsevier B.V. All rights reserved.

    Journal Title

    Optics Communications

    Volume

    254

    Issue/Number

    1-3

    Publication Date

    1-1-2005

    Document Type

    Article

    Language

    English

    First Page

    3

    Last Page

    9

    WOS Identifier

    WOS:000232087500001

    ISSN

    0030-4018

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