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Journal Articles Optics Communications Year : 2008

Intensity distribution around the focal regions of real axicons

Bing Zhou
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Michel Franco
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André Mysyrowicz


We present a theoretical and experimental study of the intensity distribution of a laser beam, after its propagation through a real axicon. We show that, while an ideal axicon generates Bessel-like radial intensity profile and smooth on-axis intensity around the focal region, in practice, the bluntness of the tip of the axicon causes significant deviations from these profiles. In particular, strong oscillations occur on the on-axis intensity. The input beam size also plays a strong role; for small beams the axicon acts more like a conventional lens, while for the large ones, it exhibits two focal regions. We also propose scheme for apodization. In all cases, the experiments match closely with the calculations. Our results show that axicons cannot be assumed to always generate smooth on-axis intensities and the structures coming from the real profiles should be taken into account for most applications.


Dates and versions

hal-00455130 , version 1 (09-02-2010)



Selcuk Akturk, Bing Zhou, Benjamin Pasquiou, Michel Franco, André Mysyrowicz. Intensity distribution around the focal regions of real axicons. Optics Communications, 2008, 281 (17), pp.4240. ⟨10.1016/j.optcom.2008.05.027⟩. ⟨hal-00455130⟩
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