Photonic crystal fiber and preparation method thereof

A photonic crystal fiber and photonic crystal technology, applied in cladding fiber, optical waveguide light guide, microstructure fiber, etc., can solve the problems of high incident power, small fiber core diameter, unbearable, etc., and achieve easy preparation and low mode field area. big effect

Pending Publication Date: 2022-06-28
MINJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

An important problem in obtaining supercontinuum with high output power at present is that in order to achieve high nonlinear coefficient of optical fiber, the core diameter of optical fiber is small and it is difficult to withstand high incident power

Method used

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  • Photonic crystal fiber and preparation method thereof
  • Photonic crystal fiber and preparation method thereof
  • Photonic crystal fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] figure 1 and figure 2 It is a schematic structural diagram of each step of Embodiment 1 of the photonic crystal fiber manufacturing method of the present invention.

[0053] Please refer to figure 1 , perform step S1, manufacture the first glass rod 3, the second glass rod 4 and the third glass rod 5, the first glass rod 3 is used to form the cladding, and the second glass rod 4 is used to form the photonic crystal fiber Structure layer, the third glass rod 5 is used to form the fiber core; the diameters of the first glass rod 3, the second glass rod 4 and the third glass rod 5 are all the same; the refractive index of the second glass rod 4 less than the refractive index of the third glass rod 5; the refractive index of the second glass rod 4 is less than the refractive index of the first glass rod 3;

[0054] Specifically, in this embodiment, the first glass rod 3 is the same as the third glass rod 5 . The refractive index of the first glass rod 3 is equal to the...

Embodiment 2

[0091] Figure 3 to Figure 5 It is a schematic structural diagram of each step of the second embodiment of the photonic crystal fiber manufacturing method of the present invention.

[0092] This example and figure 1 and figure 2 The similarities of the illustrated embodiments are not repeated here, and the differences include:

[0093] In this embodiment, the material of the first glass rod 3 and the third glass rod 5 is quartz. The core layer of the second glass rod 4 is air, and the cladding layer of the second glass rod 4 is quartz.

[0094] In this embodiment, the method for forming the second glass rod 4 includes: forming a hollow glass tube; and drawing the hollow glass tube into the second glass rod 4 , and the second glass rod 4 is a hollow glass rod.

[0095] The outer diameter of the hollow glass tube forming the second glass rod 4 is 22 mm˜28 mm, and specifically, the outer diameter of the hollow glass tube forming the second glass rod 4 is 25 mm. The inner di...

Embodiment 3

[0104] Figure 6 to Figure 8 It is a schematic structural diagram of Embodiment 3 of the preparation method of the photonic crystal fiber of the present invention.

[0105] refer to Figure 6 to Figure 8 , the similarities between this embodiment and the second embodiment are not repeated, and the differences include:

[0106] In this embodiment, the outer diameter of the hollow glass tube forming the second glass rod 4 is 22 mm˜28 mm, and specifically, the outer diameter of the hollow glass tube forming the second glass rod 4 is 25 mm. The inner diameter of the hollow glass tube forming the second glass rod 4 is 10 mm˜15 mm, and specifically, the inner diameter of the hollow glass tube forming the second glass rod 4 is 12.5 mm.

[0107] In this embodiment, the refractive index of the core layer of the third glass rod 5 is greater than the refractive index of the core layer of the second glass rod 4; the refractive index of the cladding layer of the third glass rod 5 is grea...

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Abstract

The invention relates to a photonic crystal fiber and a preparation method thereof, the photonic crystal fiber comprises a fiber core, a photonic crystal structure layer surrounding the fiber core and a protective layer surrounding the photonic crystal structure layer, and the photonic crystal fiber is characterized in that the photonic crystal structure layer only has three or less rotational symmetry axes; the refractive index of the photonic crystal structure layer is smaller than that of the fiber core, and the refractive index of the photonic crystal structure layer is smaller than that of the protective layer. The optical fiber has flexible design capability, can be designed to have high double-fold performance, special dispersion performance, large mode field performance and the like according to needs, and is simple to prepare and low in cost.

Description

technical field [0001] The invention relates to the technical field of optical fibers, in particular to a photonic crystal optical fiber and a preparation method thereof. Background technique [0002] Photonic crystal fiber, also known as microstructured fiber, generally consists of a core, a photonic crystal layer and a protective layer. In the photonic crystal layer, the regularly arranged microdomains can effectively adjust the waveguide mode and its properties. According to the transmission principle, photonic crystal fibers can be divided into band gap type and total internal reflection type. Defective photonic crystals can allow light transmission in certain frequency bands. Therefore, bandgap photonic crystal fibers require very high precision for the structural parameters of photonic crystals. The transmission principle of total internal reflection photonic crystal fiber is similar to that of traditional fiber: the refractive index of the core is higher than the ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02
CPCG02B6/02295G02B6/02347
Inventor 黄春雷周赢武郑标张诚王军
Owner MINJIANG UNIV
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