標題: Characterizing the propagation evolution of wave patterns and vortex structures in astigmatic transformations of Hermite-Gaussian beams
作者: Chen, Y. F.
Chang, C. C.
Lee, C. Y.
Tung, J. C.
Liang, H. C.
Huang, K. F.
電子物理學系
Department of Electrophysics
關鍵字: vortex;singularity;mode converter
公開日期: 1-Jan-2018
摘要: Theoretical wave functions are analytically derived to characterize the propagation evolution of the Hermite-Gaussian (HG) beams transformed by a single-lens astigmatic mode converter with arbitrary angle. The derived wave functions are related to the combination of the rotation transform and the antisymmetric fractional Fourier transform. The derived formula is systematically validated by using an off-axis diode-pumped solid-state laser to generate various high-order HG beams for mode conversions. In addition to validation, the creation and evolution of vortex structures in the transformed HG beams are numerically manifested. The present theoretical analyses can be used not only to characterize the evolution of the transformed beams but to design the optical vortex beams with various forms.
URI: http://dx.doi.org/10.1088/1555-6611/aa9625
http://hdl.handle.net/11536/144232
ISSN: 1054-660X
DOI: 10.1088/1555-6611/aa9625
期刊: LASER PHYSICS
Volume: 28
Appears in Collections:Articles