Journal
APPLIED PHYSICS LETTERS
Volume 101, Issue 26, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4773236
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Funding
- National Natural Science Foundation of China [11274005, 10904102, 61008009, 11104195]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Project of Shandong Province Higher Educational Science and Technology Program [J11LA52]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
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It is known that one can determine the topological charge of a vortex beam based on the Fourier transform of its intensity. We demonstrate both theoretically and experimentally that this method will be invalid for determining the topological charge of a vortex beam with low coherence. Furthermore, we propose a method to determine the topological charge of a vortex beam with low coherence based on its complex degree of coherence. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4773236]
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