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Formation of expanded smooth quasi-Bessel beam range due to the transformation of the Gaussian beam in absorbing axicon
Authors:AE Martirosyan
Institution:Institute for Physical Research, National Academy of Sciences of Armenia, Ashtarak-2, Ashtarak, Armenia
Abstract:The quasi-Bessel beam range produced by an absorbing axicon is investigated. It is shown that when an incident Gaussian beam is used, the absorbing axicon stretches (with respect to transparent axicon case) the uniform on-axis light intensity distribution length, as well as expanding the quasi-Bessel beam range. In addition, the peak of axial light distribution is shifted from the axicon tip. As a result any spatial modulation formed due to the bluntness of the tip is reduced close to the on-axis intensity peak, which becomes more smooth and uniform.
Keywords:Axicon  Absorption  Smooth
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