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An optical fiber structure and preparation method for degeneracy separation of non-circular symmetric scalar mode space

A mode space, optical fiber technology, used in cladding optical fibers, glass manufacturing equipment, optics, etc.

Active Publication Date: 2021-09-21
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This structure and its deformations such as multi-layer optical fiber and ring optical fiber are all circularly symmetrical structures, so they all have similar modal degeneracy problems

Method used

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  • An optical fiber structure and preparation method for degeneracy separation of non-circular symmetric scalar mode space
  • An optical fiber structure and preparation method for degeneracy separation of non-circular symmetric scalar mode space
  • An optical fiber structure and preparation method for degeneracy separation of non-circular symmetric scalar mode space

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Embodiment Construction

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0018] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It will be understoo...

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Abstract

The invention provides a novel optical fiber for polarization separation of non-circular symmetric scalar modes and a preparation method thereof. The optical fiber of the present invention is uniform in the longitudinal direction, and the refractive index profile is an axisymmetric type with layered steps, which successively includes concentric cores and cladding layers from the outside to the inside, and a rectangle in the middle of the cross section. The cladding has the same refractive index as the central rectangle, and the core has a higher refractive index than the cladding and the central rectangle. The optical fiber structure can separate the non-circularly symmetrical mode into two modes with relatively different parameters. When the optical fiber is used for mode division multiplexing, it can provide low crosstalk and easy-access modal channels, effectively reducing the complexity of the system. degree and composition cost.

Description

technical field [0001] The invention relates to a new type of optical fiber used for degenerate separation of non-circular symmetric scalar mode space. It involves the field of special optical fiber. Background technique [0002] Under the tremendous pressure of current communication demands, space division multiplexing is a new multiplexing scheme that doubles the existing communication capabilities. This solution has gained widespread attention both at home and abroad, and is generally considered to be the key technology to solve communication needs in the next stage. [0003] Modulus multiplexing is one of the two most important implementation forms of space division multiplexing, and it is also a form of realization that has attracted much attention. At present, mode division multiplexing is mainly based on scalar mode or two orthogonal modules of scalar mode. For example, for a 3-channel mode division multiplexing system, the channels used can be based on scalar mode ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02C03B37/027
CPCC03B37/02709G02B6/02338
Inventor 郑晶晶裴丽解宇恒阮祖亮田梓辰宁提纲李晶
Owner BEIJING JIAOTONG UNIV
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