Exploring vortex structures in orbital-angular-momentum beams generated from planar geometric modes with a mode converter

J. C. Tung, H. C. Liang, T. H. Lu, K. F. Huang, Y. F. Chen

研究成果: 雜誌貢獻期刊論文同行評審

16 引文 斯高帕斯(Scopus)

摘要

It is theoretically demonstrated that the planar geometric mode with a π/2 mode converter, so called the circularly geometric mode, can be solved from the inhomogeneous Helmholtz equation by considering the pump distribution on the lasing mode. Theoretical analysis clearly reveal that the vortex structures of circularly geometric modes are determined by the minimum order of transverse lasing modes, the total number of transverse lasing modes and the degenerate condition in the cavity. Moreover, we experimentally manifest that the circularly geometric mode can be generated from the selective pumped solid-state laser with an external π/2 mode converter. To explore the vortex structures of the generated geometric modes, the interference patterns are performed by an experimental apparatus consisting of a Mach-Zehnder interferometer. The good agreement between experimental observations and numerical calculations confirms the analysis of vortex structures is reliable.

原文英語
頁(從 - 到)22796-22805
頁數10
期刊Optics Express
24
發行號20
DOIs
出版狀態已發佈 - 2016 十月 3

ASJC Scopus subject areas

  • 原子與分子物理與光學

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