首页|Bessel-Gaussian beam-based orbital angular momentum holography
Bessel-Gaussian beam-based orbital angular momentum holography
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Orbital angular momentum(OAM),as a new degree of freedom,has recently been applied in holography technology.Due to the infinite helical mode index of OAM mode,a large number of holographic images can be reconstructed from an OAM-multiplexing hologram.However,the traditional design of an OAM hologram is constrained by the helical mode index of the selected OAM mode,for a larger helical mode index OAM mode has a bigger sampling distance,and the crosstalk is produced for different sampling distances for different OAM modes.In this paper,we present the design of the OAM hologram based on a Bessel-Gaussian beam,which is non-diffractive and has a self-healing property during its propagation.The Fourier transform of the Bessel-Gaussian beam is the perfect vortex mode that has the fixed ring radius for different OAM modes.The results of simulation and experiment have demonstrated the feasibility of the generation of the OAM hologram with the Bessel-Gaussian beam.The quality of the reconstructed holographic image is increased,and the security is enhanced.Additionally,the anti-interference property is improved owing to its self-healing property of the Bessel-OAM holography.
orbital angular momentumholographyBessel-Gaussian beamOAM-multiplexing hologram
季佳滢、郑志刚、朱家龙、王乐、王新光、赵生妹
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Institute of Signal Processing and Transmission,Nanjing University of Posts and Telecommunications(NJUPT),Nanjing 210003,China
Key Laboratory of Broadband Wireless Communication and Sensor Network Technology,Ministry of Education,Nanjing 210003,China
National Laboratory of Solid State Microstructures,Nanjing University,Nanjing 210093,China
National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaOpen Research Fund of the National Laboratory of Solid State Microstructures
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