Generation of adjustable micro-scale optical bottle beam by an axicon-lens system with asymmetric elliptical aperture

The purpose of this study is to examine an optimal configuration of optical bottle beam generation. The proposed bottle beam is generated by casting a laser beam through an elliptical aperture and then through an axicon optical system. Simulation is performed by using multiphysics-capable wavefront technique, and the distance between the axicon and the focus lens can be adjusted. Two-dimensional Poincaré maps are employed to show the distribution of light. By combining Poincaré maps and expected position of the bottle beam, the relationship between the beam intensity and range is obtained. The simulated results can act as a reference for positioning optical components and expecting the effective zone of the bottle beam.