High uniformity Bessel beam generated by the axicon with a high-order curved surface
Zhongsheng Zhai,
Xin Yu,
Xuan He
et al.
Abstract:.Generating high uniformity Bessel beam is an interesting target in laser processing. An axicon with a high-order curved surface is proposed to generate Gaussian–Bessel beams with high uniformity and high energy utilization. The original phase function of the standard axicon is replaced by multiple polynomials, which are optimized by a combined algorithm employing the genetic algorithm and the unconstrained nonlinear minimization algorithm. Simulation and experiment results demonstrate that the combined algori… Show more
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