Device for generating a light beam with atmospheric turbulence resistance

An atmospheric turbulence and beam technology, which is applied in optics, optical components, instruments, etc., to achieve the effect of simple structure and increased resistance to atmospheric turbulence

Active Publication Date: 2021-11-16
XIHUA UNIV
View PDF14 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of partially coherent light and the use of non-uniform polarized light have greatly improved the anti-turbulence ability of lasers, but people still have not stopped exploring beams with stronger anti-atmospheric turbulence structures.

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
  • Device for generating a light beam with atmospheric turbulence resistance
  • Device for generating a light beam with atmospheric turbulence resistance
  • Device for generating a light beam with atmospheric turbulence resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In this embodiment 1, the laser 1 is a He-Ne laser with a wavelength of 632.8nm; the focal length of the thin lens I13 in the partial coherence generation system 2 is 400mm, the focal length of the thin lens II15 and the thin lens III17 is 200mm, and the spatial light modulator 14 Holoeye LC2012 spatial light modulator; cylindrical lens I11 in partial coherence generation system 2, cylindrical lens II18 in twisted phase generation system 3, cylindrical lens III19, cylindrical lens IV20, radial polarizer in radial polarization generator 4 and The working wavelength of the spiral phase plates in the optical vortex generator 5 is 632.8nm.

[0035] The focal length of cylindrical lens I11, cylindrical lens II18, and cylindrical lens IV20 is 200mm, and the focal length of cylindrical lens III19 is 400mm; the atmospheric turbulence is uniformly distributed atmospheric turbulence; the optical receiving antenna 7 is a Cassegrain telescope; M 2 Factor Analyzer 8 for M2-200 Serie...

Embodiment 2

[0039] This embodiment maintains the same laser 1 as in Embodiment 1, the twisted phase generator 3 and the radial polarization generator 4 are canceled respectively, and other devices remain unchanged. Then, follow figure 1 The structure of the experimental device is installed with all optical components, and the other experimental steps and calculations are the same as before. Calculate the relative M of the beam obtained when the twisted phase generating system 3 is removed 2 The factors are: 1.9795, 3.7855, 7.5601; when the radial polarization generator 4 is removed, the relative M of the beam obtained 2 The factors are: 1.7071, 3.1083, 6.0812. Comparing Example 1, it can be found that the relative M of the light beam in Example 2 transmitted in atmospheric turbulence 2 The factor is significantly higher than that of Example 1, which indicates that the ability of the generated beam to resist atmospheric turbulence will be reduced when the twisted phase generating system...

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 the field of laser free space communication, in particular to a device for generating a light beam with atmospheric turbulence resistance. According to the device, linearly polarized laser output by a laser sequentially passes through a partial coherence generation system, a distortion phase generation system, a radial polarization generator and an optical vortex generator to generate a partial coherence radial polarization distortion vortex beam. The light beam has four anti-atmospheric turbulence structures of partial coherence, twisted phase, vortex phase and non-uniform polarization, so that the influence of atmospheric turbulence on the phase structure of the light beam can be effectively inhibited, and the light beam has potential application value in the fields of free space optical communication, laser radar and the like.

Description

technical field [0001] The invention belongs to the field of space laser communication, and in particular relates to a device for a light beam with anti-atmospheric turbulence capability. Background technique [0002] Because laser has the advantages of high intensity, good directionality, good monochromaticity, high coherence and high spatial resolution, it has been widely used and developed rapidly in modern industry, agriculture, medicine, communication and national defense. In recent years, with the development of atmospheric optics, more and more lasers are used in the atmosphere. Free space laser communication (FSO) is a typical representative. FSO is a technology in which lasers are used as information carriers to carry out information transmission and exchange between ground platforms and air-to-ground platforms. It has the following characteristics: (1) It has a large bandwidth, which is more than 10,000 times the bandwidth of microwave communication; (2) It does ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09G02B27/10G02B27/28G02B27/30
CPCG02B27/10G02B27/30G02B27/0988G02B27/0966G02B27/0961G02B27/0927G02B27/286
Inventor 赵亮徐勇根杨宁许颖
Owner XIHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap