Associated vortex recognition device based on equivalent tensor reconstruction method
A technology for identifying device and vortex, which is applied in the field of optical information to achieve the effect of simple device method, avoiding window effect and clear thinking
Pending Publication Date: 2020-05-15
CHINA JILIANG UNIV
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Problems solved by technology
The equivalent tensor reconstruction method has been proposed to calculate the light field, but due to the limitation of the resolution of the test end, the accurate identification of the associated vortex beam is still a problem that has not been realized by the current technology
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[0025] The present invention will be further described in detail below in conjunction with the embodiments. The following embodiments explain the present invention and are also a better application form of the present invention, but the present invention is not limited to the following embodiments.
[0026] Such as figure 1 As shown, it is a schematic structural diagram of an associated vortex identification device based on the equivalent tensor reconstruction method provided in this embodiment: it includes a helium-neon laser 1; a beam expander 2; a light beam splitter 3; Modulator 4; first computer 5; pinhole 6; density filter 7; CCD detector 8; deep neural network 9; second computer 10;
[0027] In this embodiment, the first computer 5 for generating the superposition state light field repeatedly generates digital holograms to prepare a set of holographic phase pattern sequences, and the first computer 5 is connected to the spatial light modulator 4; The sequence is loaded int...
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The invention discloses an associated vortex recognition device based on an equivalent tensor reconstruction method. The implementation steps are as follows: a beam of linearly polarized light generated by a helium-neon laser being subjected to light beam amplification and phase modulation and then irradiating a spatial light modulator; selecting first-order reflected light generated by the spatial light modulator through a pinhole and then propagated to the CCD detector through a density filter to obtain total light intensity information of associated vortexes; when the helium-neon laser irradiating the spatial light modulator, a computer connected with the spatial light modulator controls information of a generated light field through a hologram; and calculating light intensity information of the random light field by using an equivalent tensor reconstruction method, carrying out correlation operation on the light intensity information and the total light intensity obtained by the CCD detector, and recovering an image of the correlated vortex; and inputting the recovered associated vortex image into a deep neural network built in advance for training, so that the deep neural network has an associated vortex identification capability, and accurate identification of the associated vortex is realized.
Description
Technical field [0001] The invention belongs to the field of optical information and discloses an associated vortex identification device based on an equivalent tensor reconstruction method. Background technique [0002] The uniqueness of the vortex beam is mainly reflected in its special wavefront structure layout and the determined photon topological charge it carries. Using the infinity of topological charge for optical communication can greatly increase the capacity of optical communication. In recent years, the generation and detection technology of vortex beams used in optical communications has attracted more and more attention. The vortex beams also have broad development prospects in the fields of multiplexing communications and quantum secure communications. [0003] In 2003, Bogatyryova et al. explored and studied the singularity characteristics of partially coherent vortex beams, and found that the correlation function has a special point with zero amplitude, and the p...
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Login to View More IPC IPC(8): G01J1/42G01J1/02
CPCG01J1/4257G01J1/0228G01J2001/4261
Inventor 陈君周思旖
Owner CHINA JILIANG UNIV