Generation of optical vortices with arbitrary shape and array via helical phase spatial filtering

作者：Guo CS^*; Zhang Y; Han YJ; Ding JP; Wang HT

来源：Optics Communications, 2006, 259(2): 449-454.

DOI：10.1016/j.optcom.2005.09.022

• optical vortices
• helical phase
• spatial filtering
• spatial light modulator

We report a method for generation of arbitrary shape and array of optical vortices by use of a superposition of coherent elementary vortices based on helical phase spatial filtering in spatial frequency domain. In this method, a helical phase spatial filter (HPSF) is placed in the spatial frequency plane of a 4-f imaging processing system. We demonstrated that the output field distribution represents the convolution between the input field and an elementary vortex field introduced by the HPSF, which results in a special shape or array of optical vortices determined by the "degenerate" properties of coherent elementary vortices and the distribution formats of the input field.

• 出版日期2006-3-15
• 单位山东师范大学; 南京大学