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Negative curvature terahertz fiber supporting 52 orbital angular momentum modes

A technology of orbital angular momentum and negative curvature, which is applied in the field of terahertz optical fibers, can solve the problems of poor effective refractive index of optical fibers, failure to produce and support, etc., and achieve the effect of single material, high production efficiency, and simple structural design

Active Publication Date: 2022-06-24
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 fiber supporting 52 orbital angular momentum modes
  • Negative curvature terahertz fiber supporting 52 orbital angular momentum modes
  • Negative curvature terahertz 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 optical fiber structure supporting 52 orbital angular momentum modes is as described above, namely, figure 1 and figure 2 , so it is not repeated here. However, the design parameters and materials of each structural component are as follows:

[0033] The long axis of the outer elliptical cladding tube is 1.542mm, the short axis is 0.8mm, and the tube wall thickness t 1 is 0.1mm. The annular cladding tube has an inner diameter of 2.3 mm and an outer diameter of 3.002 mm. The long axis of the inner elliptical cladding tube is 0.306mm, the short axis is 0.2mm, and the wall thickness t in the long axis direction2 is 0.053mm, the tube wall thickness t in the short axis direction 3 is 0.047mm. The diameter of the waveguide core is 1.702 mm.

[0034] The polymer cladding layer, the outer elliptical cladding tube, the annular cladding tube and the inner elliptical cladding tube are ...

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Abstract

The invention discloses a negative-curvature terahertz optical fiber supporting 52 kinds of orbital angular momentum modes, which includes a polymer cladding layer, an outer elliptical cladding tube region, an annular cladding tube, an inner elliptical cladding tube region, a fiber core area. The outer elliptical cladding tube region is composed of 12 annularly arranged polymer unit structures; the inner elliptical cladding tube region is composed of 18 circularly arranged polymer unit structures; the inner elliptical cladding unit structure and the outer elliptical cladding The layer unit structure is respectively connected with the annular cladding tube unit structure to form the cladding tube area of ​​the optical fiber structure. The invention can generate orbital angular momentum (OAM) mode with relatively high purity, and can form multiple channels during communication in the annular area. The invention applies the orbital angular momentum multiplexing technology to the terahertz wave communication, improves the channel capacity of the communication system, and at the same time makes the information have higher security in the transmission process, and has the advantages of low loss, large 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 face more difficulties. In order to solve the above-mentioned series of problems, orbital angular momentum multiplexing technology, as a new multiplexing form, 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 generat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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