Journal
OPTICS LETTERS
Volume 28, Issue 22, Pages 2183-2185Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.28.002183
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A laser beam with phase singularities is an interesting object to study in optics and may have important applications in guiding atoms and molecules. We explore the characteristics of a singularity in a nondiffracting Bessel beam experimentally by use of a programmable spatial light modulator with 64-level phase holograms. The diffraction efficiency with 64-level phase holograms is greatly improved in comparison with that obtained with a binary grating. The experiments show that the size and deflection angle of the beam can be controlled in real time. The observations are in agreement with scalar diffraction theory. (C) 2003 Optical Society of America.
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