Spectral anomalies by superposition of polychromatic Gaussian beam and Gaussian vortex beam

We study the spectral property of a composite field superposed by a polychromatic Gaussian beam and a polychromatic Gaussian beam with an embedded mth-order vortex. It is shown that, in the overall spectral shift distribution, there exist m small areas where sharp spectral anomaly takes place, simil...

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Bibliographic Details
Published in:Optics express 2014-08, Vol.22 (17), p.20193-20204
Main Authors: Ding, Panfeng, Pu, Jixiong, Weng, Junhong, Han, Pin
Format: Article
Language:English
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Summary:We study the spectral property of a composite field superposed by a polychromatic Gaussian beam and a polychromatic Gaussian beam with an embedded mth-order vortex. It is shown that, in the overall spectral shift distribution, there exist m small areas where sharp spectral anomaly takes place, similarly and respectively, which are related with the ratio of the respective amplitudes of the two composite beams and the relative phase between them. Detailed investigation reveals that, for each small area, there exists a "main line", along which spectral switch can be observed.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.22.020193