Intracavity generated visible self-reconstructing Bessel-like laser beams by thermal effect

In this paper we report the intracavity realization of visible reconstructing Bessel-like beams when a thin Nd:YVO4 crystal is inserted in a diode-pumped Pr:YLF laser at 639.5 nm. The position of the thin crystal and the intracavity power determine the Bessel-like mode generated. The self-reconstructing characteristic of the obtained Bessel-like beam is also demonstrated.