Spectral anomalies of diffracted pulsed cosh-Gaussian beams in dispersive media

Starting from the Rayleigh–Sommerfeld diffraction integral, the closed-form expressions for the near- and far-field power spectra of diffracted pulsed cosh-Gaussian (ChG) beams propagating in dispersive media are derived, and the anomalous behavior of the far-field spectrum of diffracted pulsed ChG...

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Bibliographic Details
Published inOptik (Stuttgart) Vol. 119; no. 2; pp. 97 - 102
Main Authors Zou, Qihui, Lü, Baida
Format Journal Article
LanguageEnglish
Published Jena Elsevier GmbH 01.02.2008
Elsevier
Subjects
Beam characteristics: profile, intensity, and power; spatial pattern formation
Diffraction and scattering
Dispersive medium
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Laser optical systems: design and operation
Optics
Phase singularity
Physics
Pulsed cosh-Gaussian (ChG) beam
Spectral switch
Wave optics
Wave propagation, transmission and absorption
Pulsed cosh-Gaussian (ChG) beam
Spectral switch
Phase singularity
Dispersive medium
Gaussian beam
Dispersive media
Pulse width
Electromagnetic wave propagation
Electromagnetic wave diffraction
Far field
Pulsed beam
Diffraction integral
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Summary:Starting from the Rayleigh–Sommerfeld diffraction integral, the closed-form expressions for the near- and far-field power spectra of diffracted pulsed cosh-Gaussian (ChG) beams propagating in dispersive media are derived, and the anomalous behavior of the far-field spectrum of diffracted pulsed ChG beams in dispersive media is studied. It is shown that near the phase singularities, the spectral switch may take place. The truncation parameter, decentered parameter and pulse duration of pulsed ChG beams and the dispersive property of the medium affect the behavior of the spectral switch of pulsed ChG beams.
ISSN:0030-4026
1618-1336
DOI:10.1016/j.ijleo.2006.07.004