Unlock instant, AI-driven research and patent intelligence for your innovation.

Vortex intensity measuring device of vortex light beam and measuring method thereof

A vortex beam, intensity measurement technology, applied in the direction of using the method of comparing with the reference electrical parameters, etc., can solve the problems of increased experimental difficulty and experimental conditions, and high requirements for the construction of optical path systems, and achieves easy access to detection components and simple detection components. Effect

Pending Publication Date: 2022-04-08
SICHUAN UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional Fourier transform-based or phase-shift interference-based interferometry requires extremely high requirements for the construction of the optical system, which greatly increases the difficulty and conditions of the experiment.
In addition, due to the phase singularity of vortex beams, the phase unwrapping algorithm has certain limitations when used in vortex beams

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Vortex intensity measuring device of vortex light beam and measuring method thereof
  • Vortex intensity measuring device of vortex light beam and measuring method thereof
  • Vortex intensity measuring device of vortex light beam and measuring method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] figure 1 It is a schematic diagram of a device for measuring the vortex intensity of a vortex beam according to the present invention, such as figure 1 As shown, laser light with a wavelength of 633nm emitted by laser 1 passes through a beam splitter 2 with a splitting ratio of 50:50 and is divided into a reference beam and a beam to be measured. The reference beam passes through the circular grating 3, and the total number of circular gratings in this example is 1024 , the rotation speed is 0.01r / s, after the reference beam passes through the circular grating, its +1 order diffracted light is selected by the diaphragm 4, and the frequency is shifted by 10Hz, after adjusting the polarization state and transmission direction through the polarizer 5 and the mirror 6, it is incident on the beam splitter Prism 10 places. The beam to be measured becomes vortex light after passing through the spiral phase plate 8. In this example, the phase loaded by the spiral phase plate i...

Embodiment 2

[0042]In this embodiment, the vortex intensity measurement of the fractional vortex beam is carried out, and the helical phase plate with the topological charge α=-1.7 is placed in the optical path to be measured, and the measurement is carried out under the same conditions as in Example 1 for the rest of the experimental conditions, and Compare the measured results with the simulated results, such as image 3 shown. From image 3 It can be seen that the measured results are in good agreement with the simulated results, and finally passed image 3 (d) Calculate the vortex intensity S of the beam α =-2.

[0043] In summary, the present invention can realize high-precision measurement of vortex intensity of vortex beams, and can be applied to multi-topological charge vortex beams with complex phase distribution.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a vortex beam vortex intensity measuring method based on a low-frequency heterodyne interferometer. The measuring device comprises a vortex light generating module used for generating vortex light to be measured; the frequency shift module is used for changing the frequency of the reference light wave; the interference module is used for interference between the vortex light to be measured and the reference light; and the imaging device is used for receiving the interference fringe information and transmitting the interference fringe information to the computer for data processing and vortex intensity calculation. According to the method, the vortex intensity is measured by calculating the phase distribution of the vortex light beams, the method is a novel measurement method, elements required for detection are simple and easy to obtain, and the total vortex intensity of the vortex light beams in a specified area can be accurately measured.

Description

technical field [0001] The invention relates to a method for measuring the vortex intensity of a vortex beam, in particular to a measuring device and method for realizing the vortex intensity based on a phase distribution analysis method of a vortex beam of a low-frequency heterodyne interferometer. Background technique [0002] Vortex beams with phase singularity and orbital angular momentum have broad application prospects, not only for the rotation and trapping of tiny particles, but also for optical processing, quantum communication and other fields. The vortex intensity of a vortex beam is related to the orbital angular momentum of its optical field, which not only determines its ability to interact with matter, but also reflects the information storage capacity and transmission stability of a vortex beam in the field of optical communication. Therefore, it is of great significance to measure the vortex intensity. [0003] In the current existing research, the measurem...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01J1/22
Inventor 冯国英郭劲苗
Owner SICHUAN UNIV