提出一种由轴棱锥产生的贝塞尔光干涉整形得到具有自成像塔尔博特效应的近似无衍射局域空心光束的新方法。详细分析了两束相干同频率贝塞尔光的相互作用原理及其如何控制局域空心光束的空间尺寸。数值模拟了干涉叠加后光场沿传输距离变化的光强分布及一个完整周期内光强的演变和局域空心光束的形成过程,给出了相干贝塞尔光产生局域空心光束的个数及局域空心光束最大无衍射距离的表达式。

A novel technique to produce the self-imaging Talbot effect, nearly non-diffracting bottle beams which were interfered by the two Bessel beams generated from the axicons was proposed. The dynamic interaction in two interfering Bessel beams with the same angular frequency and the size control of the bottle beams were analyzed in detail. The light intensity distribution of the superimposed optical field along the propagation distance and the intensity evolution of the bottle beams in a complete period were simulated numerically. The expressions for the bottle beam number generated by the interfering Bessel beams and the non-diffracting distance of the bottle beams were given.