Intra-cavity generation of superpositions of Laguerre–Gaussian beams |
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Authors: | D Naidoo K A?t-Ameur M Brunel and A Forbes |
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Institution: | (1) Department of Physics, Harbin Institute of Technology, Harbin, 150001, China;(2) Department of Automation Measurement and Control Engineering, Harbin Institute of Technology, Harbin, 150001, China; |
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Abstract: | In this paper we demonstrate experimentally the intra-cavity generation of a coherent superposition of Laguerre–Gaussian modes
of zero radial order but opposite azimuthal order. The superposition is created with a simple intra-cavity stop that creates
equal losses for the two azimuthal modes, and we show that by adjustment of the stop we can produce modes up to azimuthal
order 8. The fact that we have a coherent superposition rather than an incoherent superposition is verified by intensity measurements,
propagation measurements and a decomposition of the field by an inner product executed on a phase-only spatial light modulator.
Such fields have relevance in quantum information and optical trapping. |
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Keywords: | |
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