High-speed light orbital angular momentum superposition state generator based on linear electro-optical effect

Abstract

The invention discloses a high-speed light orbital angular momentum superposition state generator based on a linear electro-optical effect. The high-speed light orbital angular momentum superpositionstate generator comprises a phase modulator (1), a packaging material (2) and power interfaces (3) and (4) and is characterized in that the phase modulator is used for modulating light field phase; the packaging material is arranged outside the phase modulator to protect the same; the power interfaces are used for being connected with a power supply so as to apply voltage to the phase modulator. The light orbital angular momentum superposition state generator has the advantages that laser output by a laser device vertically enters from one end of the phase modulator and then goes out from theother end of the phase modulator; when voltage is applied to two ends of the phase modulator, the laser passing the phase modulator can be converted into light carrying a light orbital angular momentum superposition state.

Description

technical field [0001] The invention relates to the generation and control technology of the optical orbital angular momentum superposition state, in particular to a high-speed optical orbital angular momentum superposition state generator based on the linear electro-optic effect. Background technique [0002] In recent years, with the rapid development of multimedia communications, e-commerce, and computer networks, the scope of people exchanging information through the Internet has continued to expand, and the data services represented by IP have increased significantly, resulting in a sharp increase in the capacity requirements of communication networks. The bandwidth of the system has become an urgent need for further development of communication. The multiplexing technology based on Optical Orbital Angular Momentum (OAM) is an effective method proposed in recent years to improve the capacity of optical communication. Using this method, researchers have experimentally a...

AI Technical Summary

Problems solved by technology

An obvious defect of spatial light modulator is slow response speed, and the response speed of general liquid crystal spatial light modulator is about 1kHz (S.A.Serati, et al.Proceedings of SPIE., 5106,138-145 (2003); J.E.Stockley, et al.Opt.Lett., 20(23), 2441-2443(1995)), which is far from meeting the needs of high-speed optical modulation in optical communication

The disadvantage of using a metasurface and an integrated angular momentum grating to generate an OAM superposition state is that a well-designed metasurface or integrated grating cannot be changed, resulting in a fixed OAM superposition state that is not adjustable.

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