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Modified Bessel–Gaussian Vortex Beam with an Adjustable Broken Opening

In this study, an open‐ring controllable Bessel vortex beam is theoretically and experimentally constructed with a power‐exponent‐phase vortex. Its distribution in the far field after being blocked with obstacles is subsequently investigated. In the far field, the beam exhibits different degrees of the open‐loop effect following adjustments in the phase term of the power exponent. For an obstructed beam, the direction of the open loop is offset by a certain value, and different open‐loop angles can be achieved for different blocking angles. The developed beam can be used to guide particles and avoid obstacles.