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Negative curvature terahertz optical fiber supporting 52 orbital angular momentum modes

A technology of orbital angular momentum and negative curvature, applied in the field of terahertz fiber, can solve the problems of effective refractive index difference of optical fiber, unable to generate and support, and achieve the effect of single material, high production efficiency and simple structure design

Active Publication Date: 2021-06-29
CHINA JILIANG UNIV
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Problems solved by technology

[0003] Since the generation and transmission of the orbital angular momentum mode has strict requirements on the fiber structure, the effective refractive index difference of ordinary optical fibers is generally small, and cannot generate and support the transmission of the orbital angular momentum mode.

Method used

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  • Negative curvature terahertz optical fiber supporting 52 orbital angular momentum modes
  • Negative curvature terahertz optical fiber supporting 52 orbital angular momentum modes
  • Negative curvature terahertz optical fiber supporting 52 orbital angular momentum modes

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Embodiment 1

[0032] In this embodiment, the shape of each component based on the negative-curvature terahertz fiber structure supporting 52 orbital angular momentum modes is as described above, namely figure 1 and figure 2 , so it will not be repeated here. However, the design parameters and materials of each structural component are as follows:

[0033] The long axis of the outer oval cladding tube is 1.542mm, the short axis is 0.8mm, and the thickness of the tube wall is t 1 0.1mm. The annular cladding tube has an inner diameter of 2.3 mm and an outer diameter of 3.002 mm. The major axis of the inner elliptical cladding tube is 0.306mm, the minor axis is 0.2mm, and the thickness of the tube wall in the direction of the major axis is t2 is 0.053mm, the thickness of the tube wall in the minor axis direction t 3 is 0.047mm. The diameter of the waveguide core is 1.702 mm.

[0034] The materials used for the polymer cladding layer, the outer elliptical cladding tube, the annular claddi...

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Abstract

The invention discloses a negative curvature terahertz optical fiber supporting 52 orbital angular momentum modes. The negative curvature terahertz optical fiber comprises a polymer coating layer, an outer oval cladding tube region, an annular cladding tube, an inner oval cladding tube region and a fiber core region, wherein the outer elliptical cladding tube region consists of 12 polymer unit structures which are annularly arranged; the inner elliptical cladding tube region consists of 18 polymer unit structures which are annularly arranged; and the inner elliptical cladding unit structure and the outer elliptical cladding unit structure are respectively connected with the annular cladding tube unit structure to form a cladding tube region of the optical fiber structure. According to the optical fiber, an orbital angular momentum (OAM) mode with relatively high purity can be generated, and a plurality of channels can be formed during communication in an annular region. The orbital angular momentum multiplexing technology is applied to terahertz wave communication, the channel capacity of a communication system is improved, meanwhile, the information has higher safety in the transmission process, and the terahertz wave communication system has the advantages of being low in loss, large in communication capacity and the like.

Description

technical field [0001] The invention relates to the field of terahertz optical fibers, in particular to a negative curvature terahertz optical fiber supporting 52 orbital angular momentum modes. Background technique [0002] With the rapid development of optical fiber communication systems in modern communication networks, the requirements for data transmission speed, capacity, and confidentiality are getting higher and higher, and traditional wavelength division multiplexing and time division multiplexing technologies are facing more difficulties. In order to solve the above series of problems, orbital angular momentum multiplexing technology, as a new form of multiplexing, provides a new solution for increasing network bandwidth, communication capacity and communication rate. Therefore, the application of orbital angular momentum multiplexing technology in optical fiber communication has gradually become a hot research topic in today's society. [0003] Since the generati...

Claims

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Application Information

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IPC IPC(8): G02B6/02G02B6/036
CPCG02B6/02347G02B6/02371G02B6/036
Inventor 严德贤袁紫微孟淼封覃银李向军
Owner CHINA JILIANG UNIV
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