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Single-polarization low-loss hollow-core negative-curvature optical fiber

A low-loss, single-polarization technology, applied in polarized fibers, clad fibers, optics, etc., can solve the problems of low damage resistance threshold, small effective mode field area, high dispersion and nonlinear effects, and achieve the goal of reducing transmission loss Effect

Active Publication Date: 2021-09-28
BEIJING UNIV OF POSTS & TELECOMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the main communication optical fibers are divided into solid-core optical fibers and hollow-core optical fibers. In addition, due to the material characteristics of solid-core optical fibers, high dispersion and nonlinear effects will inevitably be introduced. In addition, solid-core optical fibers also have an anti-damage threshold Low, the effective mode field area is small, etc.

Method used

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  • Single-polarization low-loss hollow-core negative-curvature optical fiber
  • Single-polarization low-loss hollow-core negative-curvature optical fiber
  • Single-polarization low-loss hollow-core negative-curvature optical fiber

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Embodiment 1

[0052] Embodiment 1: The major axis d of the elliptical core region 1 is: 53μm, the minor axis d of the elliptical core region 2 For: 45μm. The diameter d of the two circular cladding tubes 4 For: 29μm. The diameter d of the semicircular portion of the two U-shaped nesting rings 5 is: 20 μm, the maximum distance d between the bottom of the U-shaped nesting ring and the inner wall of the circular cladding tube 5 For: 20μm. The diameter d of the six circular cladding tubes 3 For: 25μm. the t 1 For: 1.116μm. the t 2 For: 1.506μm. The angle between adjacent tubes of the eight quartz-clad tubes is 44.6 degrees.

Embodiment 2

[0053] Embodiment 2: The major axis d of the elliptical core region 1 is: 55μm, the minor axis d of the elliptical core region 2 For: 47μm. The diameter d of the two circular cladding tubes 4 For: 31μm. The diameter d of the semicircular portion of the two U-shaped nesting rings 5 is: 22 μm, the maximum distance d between the bottom of the U-shaped nesting ring and the inner wall of the circular cladding tube 5 For: 22μm. The diameter d of the six circular cladding tubes 3 For: 26μm. the t 1 For: 1.118μm. the t 2 For: 1.508μm. The angle between adjacent tubes of the eight quartz-clad tubes is 45.4 degrees.

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Abstract

The invention provides a single-polarization low-loss hollow-core negative-curvature optical fiber. The single-polarization low-loss hollow-core negative-curvature optical fiber comprises an outer layer structure, a cladding region and a hollow-core fiber core region, wherein the cladding region comprises a plurality of circular cladding pipes with the same wall thickness, the plurality of circular cladding pipes are tightly attached to the inner surface of the outer layer structure, and the included angle between every two adjacent circular cladding pipes is 44.6-45.4 degrees; the cladding region further comprises at least one U-shaped nesting ring which is arranged in the circular cladding tube, and the U-shaped nesting ring and the circular cladding tube are of an integrated structure. The wall thickness of the U-shaped nesting ring is larger than that of the circular cladding tube, and the diameter of the circular cladding tube provided with the U-shaped nesting ring is different from those of other circular cladding tubes; and the hollow fiber core region is a region enclosed by the plurality of circular cladding tubes. According to the invention, single-polarization transmission can be realized and loss can be reduced.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to a single-polarization low-loss hollow-core negative-curvature optical fiber. Background technique [0002] With the development of communication systems, optical fiber, as a new generation of transmission medium, has been widely used in the field of information transmission. At present, the main communication optical fibers are divided into solid-core optical fibers and hollow-core optical fibers. In addition, due to the material characteristics of solid-core optical fibers, high dispersion and nonlinear effects will inevitably be introduced. In addition, solid-core optical fibers also have an anti-damage threshold Low, the effective mode field area is small and other deficiencies. Compared with solid core fibers, the low dispersion and low nonlinear characteristics of hollow core fibers attract more and more people's attention. Among them, the existing holl...

Claims

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Application Information

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IPC IPC(8): G02B6/02G02B6/024G02B6/032
CPCG02B6/032G02B6/024G02B6/02342
Inventor 苑金辉王启伟邱石屈玉玮周桂耀夏长明周娴颜玢玢王葵如桑新柱余重秀
Owner BEIJING UNIV OF POSTS & TELECOMM
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