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Effect of dispersion on the spectrum of partially coherent beams.

Authors :
Pan L
Yuan X
Ding C
Lü B
Source :
Journal of the Optical Society of America. A, Optics, image science, and vision [J Opt Soc Am A Opt Image Sci Vis] 2008 Aug; Vol. 25 (8), pp. 2122-8.
Publication Year :
2008

Abstract

Taking the Gaussian Schell-model (GSM) beam as a typical example of partially coherent beams, the analytical expressions of the spectrum of GSM beams propagating in dispersive media are derived, and the spectral properties are studied in detail. It is shown that, in comparison with propagation in free space and in turbulence, whether or not GSM beams satisfy the scaling law, the normalized spectrum of GSM beams in dispersive media changes on propagation in general, because the dispersive medium affects different spectral components differently. As compared with the free-space propagation, for the scaling-law GSM beams the dispersion results in spectrum change, and for the nonscaling-law GSM beams the dispersion gives rise to a further increase in spectral changes. The structure constant of the dispersive property of the media, the transverse coordinate of the observation point, the spatial correlation length of the source, and the propagation distance affect the spectral behavior of GSM beams; this effect is illustrated numerically.

Details

Language :
English
ISSN :
1084-7529
Volume :
25
Issue :
8
Database :
MEDLINE
Journal :
Journal of the Optical Society of America. A, Optics, image science, and vision
Publication Type :
Academic Journal
Accession number :
18677375
Full Text :
https://doi.org/10.1364/josaa.25.002122