Bessel-Gauss resonator based on an axicon with a plane output mirror
A simple concept is applied to the construction of a Bessel-Gauss resonator based on an axicon with a plane output mirror.Fox-Li algorithm and numerical integral are applied respectively to describe the radical amplitude at output mirror and the three-dimensional field distribution of output beam.Analysis reveals that the dominant mode of the resonator has similar features as zero-order Bessel-Gauss beams do.Effect of varying the cavity length on the output transverse profile of the dominant mode of the cavity is discussed.Simulation results show that the features of the dominant mode of the resonator remain unchanged when the cavity length change is small.The resonator scheme based on Nd: YAG laser was implemented in an experiment to confirm the possibility of generating zero-order Bessel-Gauss beams.The output transverse intensity distributions captured by beam analyzer roughly agree with the theoretical expectations.