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An anti-resonant optical fiber with both single-mode transmission and low bending loss

A bending loss and anti-resonance technology, applied in multi-layer core/clad fibers, clad fibers, optics, etc., can solve the problem of not being able to ensure low bending loss and quasi-single-mode transmission at the same time, and achieve good dispersion control characteristics , the effect of low bending loss and high damage threshold

Active Publication Date: 2021-07-09
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it solves the problem that low bending loss and quasi-single-mode transmission cannot be guaranteed at the same time in the prior art

Method used

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  • An anti-resonant optical fiber with both single-mode transmission and low bending loss
  • An anti-resonant optical fiber with both single-mode transmission and low bending loss
  • An anti-resonant optical fiber with both single-mode transmission and low bending loss

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 As shown, a graded-cladding eccentric hollow-core antiresonant fiber with 10 thin-walled tubes is shown, where the ratio of the largest thin-walled ring diameter to the core is 0.65, and the smallest ratio of the thin-walled ring diameter to the core diameter is 0.3. Each thin-walled tube is separated by a distance of 6 wall thicknesses. The core circle is tangent to all thin-walled tubes.

[0028] In this embodiment, the core region may be liquid, gas or vacuum.

[0029] In this embodiment, the high refractive index thin-walled tube and the outer cladding are silicon dioxide, doped glass, photosensitive resin or plastic.

Embodiment 2

[0031] Such as figure 2 As shown, a graded cladding eccentric hollow-core antiresonant fiber with 8 thin-walled tubes is shown, in which the ratio of the largest thin-walled ring diameter to the fiber core is 0.7, and the ratio of the smallest thin-walled ring diameter to the fiber core diameter is 0.45. Each thin-walled tube is separated by a distance of 5 wall thicknesses. The core circle is tangent to all thin-walled tubes.

[0032] In this embodiment, the core region may be liquid, gas or vacuum.

[0033] In this embodiment, the high refractive index thin-walled tube and the outer cladding are silicon dioxide, doped glass, photosensitive resin or plastic.

[0034] Such as image 3 As shown, the figure shows the second embodiment of the present invention-the cladding graded eccentric hollow-core anti-resonance fiber of 8 thin-walled tubes and the traditional symmetrical 8-thin-walled tube and 6-thin-walled tube hollow-core anti-resonant fiber bending Simulation compari...

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Abstract

The invention discloses an anti-resonance optical fiber with the characteristics of single-mode transmission and low bending loss, belonging to the technical field of optics and laser optoelectronics. The fiber has a special cladding structure design, which greatly reduces the bending loss of the fiber and improves the single-mode transmission characteristics of the fiber. Compared with the traditional total internal reflection type and symmetric type hollow-core anti-resonant optical fiber, the optical fiber of the invention has the advantages of low bending loss, quasi-single-mode transmission, wide transmission spectrum, low dispersion, high damage threshold and the like. Simulation and experiments show that the bending loss is reduced by an order of magnitude at a small bending radius compared with the traditional symmetric anti-resonant fiber. Simultaneous simulation and CCD imaging also prove that it has good quasi-single-mode transmission characteristics. The invention has great application prospect in optical fiber sensing, optical fiber gas laser and high-power ultra-short pulse laser transmission.

Description

Technical field: [0001] The invention belongs to the technical fields of optical communication and laser optoelectronics, and in particular relates to an anti-resonant optical fiber with low bending loss characteristics and quasi-single-mode transmission characteristics. Background technique [0002] Optical fiber technology plays a key role in many fields such as communication, laser, nonlinearity, sensing, quantum, biology, etc., and has greatly promoted the progress of human society. However, with the development of the times, intrinsic defects such as low damage threshold, inability to guide light in the ultraviolet-infrared band, and high nonlinearity of traditional solid-core optical fibers have gradually emerged. Hollow-core photonic crystal fiber creates an ideal optical transmission environment similar to free space with low dispersion, low nonlinearity, low time delay and low loss for light waves in long-distance flexible links, so it has many advantages that tradi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02G02B6/036
CPCG02B6/02328G02B6/02347G02B6/03622
Inventor 顾帅娄淑琴盛新志王鑫
Owner BEIJING JIAOTONG UNIV
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