Modified hollow Gaussian beam and its paraxial propagation

作者：Cai Yangjian^*; Chen Chiyi; Wang Fei

来源：Optics Communications, 2007, 278(1): 34-41.

DOI：10.1016/j.optcom.2007.06.012

• hollow Gaussian beam
• propagation factor
• optical system

A model named modified hollow Gaussian beam (HGB) is proposed to describe a dark hollow beam with adjustable beam spot size, central dark size and darkness factor. In this modified model, both the beam spot size and the central dark size will be convergent to finite constants as the beam order approaches infinity, which are much different from that of the previous unmodified model, where the beam spot size and the central dark size will not be convergent as the beam order approaches infinity. The dependences of the propagation factor of modified and unmodified HGBs on the beam order are found to be the same. Based on the Collins integral, analytical formulas for the modified HGB propagating through aligned and misaligned optical system are derived. Some numerical examples are given.

• 出版日期2007-10-1
• 单位浙江大学; 杭州师范大学