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A photonic crystal fiber with Dirac point in the photonic band gap based on silica glass

A technology of photonic crystal fiber and quartz glass, which is applied in the field of optics and fiber to achieve the effects of reducing the cost of raw materials and the difficulty of process control, being easy to prepare, and having long material properties.

Active Publication Date: 2020-01-14
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing Dirac-point photonic crystal fiber needs to use high-refractive index glass, and to provide a photonic crystal fiber with Dirac point in the photonic band gap using quartz glass as the matrix

Method used

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  • A photonic crystal fiber with Dirac point in the photonic band gap based on silica glass
  • A photonic crystal fiber with Dirac point in the photonic band gap based on silica glass
  • A photonic crystal fiber with Dirac point in the photonic band gap based on silica glass

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Embodiment 1

[0034] A photonic crystal fiber with a Dirac point in the photonic band gap using quartz glass as the matrix, the schematic cross-section is shown in Figure 1a , the schematic diagram of the primary cell structure of the cladding see Figure 1b ; Among them, the core diameter of the optical fiber is 9.05 μm, the distance between adjacent small-diameter air holes in the cladding of the optical fiber is 2.75 μm, the diameter of the small-diameter air holes is 1.1 μm, and the diameter of the large-diameter air holes is 4.26 μm. Rate n=1.45;

[0035] The energy band diagram of the cladding structure of the optical fiber calculated by the plane wave expansion method is as follows: Figure 2a shown by Figure 2a It can be seen that in the energy band diagram of the cladding structure, a mature Dirac cone with a good linear dispersion relationship appears at the corner point K of the Brillouin zone; among them, the fourteenth and fifteenth energy bands The schematic diagram of six...

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Abstract

The present invention provides a pohotonic crystal fiber having Dirac points in a photonic band gap by employing quartz glass as a matrix. The pohotonic crystal fiber comprises a fibre core and a cladding around the fibre core; the fibre core is a air-hole defect introduced by a cladding structure center; and the cladding is quartz glass with an improved honeycomb structure hole. In the pohotoniccrystal fiber, the improved honeycomb structure is employed to allow the cladding energy band structure to have Dirac points to form a pohotonic crystal fiber conduction Dirac mode and reduce the requirements of the Dirac point pohotonic crystal fiber for the matrix glass refractive index so as to take pure silica glass as matrix materials of the fiber, greatly reduce the original material cost and the process control difficulty of the fibre-optical drawing process and improve the application prospect of the Dirac mode fiber in an optical device.

Description

technical field [0001] The invention belongs to the field of optics and optical fiber technology, and in particular relates to a photonic crystal optical fiber with a Dirac point in the photonic band gap using quartz glass as a matrix. Background technique [0002] Hollow bandgap photonic crystal fibers have been developed rapidly due to their excellent optical properties such as low transmission loss, low nonlinearity and high transmission power, and have been widely used in optical fiber sensing, optical communication, gas nonlinear optics and laser transmission, etc. field. The traditional hollow-core bandgap photonic crystal fiber relies on the photonic bandgap to suppress the divergence of light, so that the light of the corresponding frequency is locally transmitted in the fiber core, and the electromagnetic field intensity of the corresponding mode decays exponentially with the distance, and the interaction between the modes is short-range. [0003] Photonic crystal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02
CPCG02B6/02328G02B6/02347
Inventor 杨中民杨力钱奇
Owner SOUTH CHINA UNIV OF TECH
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