期刊
OPTICS LETTERS
卷 35, 期 15, 页码 2660-2662出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.35.002660
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资金
- National Health and Medical Research Council of Australia
- Australian Research Council
We describe an optical beam converter for an efficient transformation of Gaussian femtosecond laser beams to single- or double-charge vortex beams. The device achieves a conversion efficiency of 75% for single- and 50% for double-charge vortex beams and can operate with high-energy broad bandwidth pulses. We also show that the topological charge of a femtosecond vortex beam can be determined by analyzing its intensity distribution in the focal area of a cylindrical lens. (C) 2010 Optical Society of America
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