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Device and method for measuring orbital angular momentum of vortex light

A technology of orbital angular momentum and measuring devices, which is applied in the direction of measuring devices, optical instrument testing, machine/structural component testing, etc. It can solve the problems of experimental difficulty, increased experimental conditions, and extremely high requirements for optical paths, and achieves simple and easy detection of components. The effect

Active Publication Date: 2021-06-01
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

For interferometry, there is a classic Mach-Zehnder interferometer-based interferometric pattern measurement [Optics Communications334, 235 (2015)]. However, the construction of the interferometric system has extremely high requirements on the optical path and requires a narrow-band coherent laser source, making it Experimental difficulty and experimental conditions are greatly increased

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  • Device and method for measuring orbital angular momentum of vortex light
  • Device and method for measuring orbital angular momentum of vortex light
  • Device and method for measuring orbital angular momentum of vortex light

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0029] Such as figure 1 As shown, the measurement device of the orbital angular momentum number of vortex light based on the straight edge diffraction of an opaque dry plate includes a vortex light generation module for generating the vortex light to be measured; a diffraction module for converting the vortex light to be measured into edge diffracted light , to block a part of the vortex light to be measured, and the unblocked part is incident to the imaging device after near-field diffraction; the imaging device is used to receive the vertically incident edge diffracted light, and transmit it to the computer after imaging.

[0030] The vortex light generation module includes a continuous laser 1, the selected wavelength of the continuous wave laser 1 in this embodiment is 1064nm, and the pow...

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Abstract

A device for measuring orbital angular momentum of vortex light based on straight edge diffraction of an opaque dry plate comprises a vortex light generation module which is used for generating vortex light to be measured; a diffraction module which is used for converting the vortex light to be measured into edge diffraction light to block a part of a vortex light field and enabling the unblocked part to be subjected to near-field diffraction and then enter an imaging device; and the imaging device which is used for receiving the vertically incident edge diffraction light and transmitting the edge diffraction light to a computer after imaging. According to the invention, the orbital angular momentum of the vortex light can be measured, a detection element is simple and easy to obtain, and the orbital angular momentum of the vortex light can be rapidly detected.

Description

technical field [0001] The invention relates to a method for measuring the orbital angular momentum of vortex light, in particular to a measuring device and method for realizing the orbital angular momentum of vortex light based on the straight edge Fresnel zone diffraction pattern analysis method of an opaque dry plate. Background technique [0002] The vortex light with phase singularity and orbital angular momentum has important application prospects in the fields of optical manipulation, optical tweezers, quantum communication and particle acceleration. The orbital angular momentum of vortex light not only determines the torsion force when vortex light interacts with matter, but also, as a new light field dimension, can greatly expand the information capacity in optical communication. Therefore, the orbital angular momentum carries the energy and information of the light field, and its measurement is extremely important. [0003] In the current existing research, the me...

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Application Information

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IPC IPC(8): G01M11/02
CPCG01M11/0207
Inventor 晋云霞赵靖寅邵建达孔钒宇莫建威郝旺
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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