Generation of a Bessel Beam Using an AXICON Lens.

Hello,

I am looking foward for ideas as to how to generate/make an AXICON (conical lens) in COMSOL and using a source as Gaussian beam (GB) with a specific wavelenght (1064 nm). And hwo to generate a Bessel beam(BB) when GB hits the Axicon.

Thanks.kind regards Kaustuv