Study on the propagation characteristics of elliptical Airy vortex beam

The propagation characteristics of elliptical Airy vortex beams (EAVB) with different elliptical parameter and topological charges are demonstrated experimentally and numerically. Besides, the relationship between elliptical parameter and detection probability of the orbital angular momentum(OAM) is analyzed numerically. The results show that elliptical parameter has a significant impact on the OAM spectral distribution and the propagation characteristics of the EAVB. The EAVB possess an elliptical shaped transverse pattern in the main lobe surrounded by a series of rings and has the line of intensity nulls in the focal plane. It also has two focal planes during the propagation, and the distance between the two focal plane becomes shorter with the increase of elliptical parameter. The long axis of the intensity ellipse of the EVAB rotates 90°between the second focal plane and the first focal plane. There is a linear relationship between OAM detection probability and the elliptical parameter. The experimental results are in good agreement with theory, which will be helpful for the application of EAVB in optical trapping and optical communication.