A comparison on the propagation characteristics of focused Gaussian beam and fundamental Gaussian beam in vacuum

Propagation characteristics of focused Gaussian beam (FoGB) and fundamental Gaussian beam (FuGB) propagating in vacuum are investigated. Based on the Fourier transform and the angular spectral analysis, the transverse component and the second-order approximate longitudinal component of the electric...

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Bibliographic Details
Published inPhysics letters. A Vol. 327; no. 2; pp. 254 - 262
Main Authors Liu, Shixiong, Guo, Hong, Liu, Mingwei, Wu, Guohua
Format Journal Article
LanguageEnglish
Published Elsevier B.V 28.06.2004
Subjects
Focused Gaussian beam
Fundamental Gaussian beam
Propagation characteristics
Propagation characteristics
42.80.A
Fundamental Gaussian beam
Focused Gaussian beam
42.60.E
42.10
42.30.K
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Summary:Propagation characteristics of focused Gaussian beam (FoGB) and fundamental Gaussian beam (FuGB) propagating in vacuum are investigated. Based on the Fourier transform and the angular spectral analysis, the transverse component and the second-order approximate longitudinal component of the electric field are obtained in the paraxial approximation. The electric field components, the phase velocity and the group velocity of FoGB are compared with those of FuGB. The spot size of FoGB is also discussed.
ISSN:0375-9601
1873-2429
DOI:10.1016/j.physleta.2004.05.021