Journal
OPTICS LETTERS
Volume 40, Issue 5, Pages 788-791Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.40.000788
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Funding
- Fundamental Research Funds for the Central Universities
- National Natural Science Foundation of China [11374008, 11374238, 11374239]
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When a vortex beam with a spiral phase structure passes through dynamic angular double slits (ADS), the interference pattern changes alternatively between destructive and constructive at the angular bisector of the ADS. This change is due to their phase difference. Based on this property, we experimentally demonstrate a simple method to precisely and efficiently determine the topological charge of vortex beams. Furthermore, this scheme allows for the simultaneous determination of the modulus and the sign of the topological charge of the vortex beams. (C) 2015 Optical Society of America.
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