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Grapheme-coated side-polishing double-core photonic crystal fiber polarization converter

A technology of photonic crystal fiber and graphene, applied in clad fiber, optical waveguide light guide, optics, etc., to achieve the effect of small size, high polarization extinction ratio, and good development prospects

Inactive Publication Date: 2019-06-18
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is to overcome the problem that most current graphene-coated side-polished optical fiber polarization converters can only modulate a single polarization mode, and provide a novel graphene-coated side-polished Milled Duplex Photonic Crystal Fiber Polarization Converter

Method used

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  • Grapheme-coated side-polishing double-core photonic crystal fiber polarization converter

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Embodiment 1

[0019] The cross-section of a graphene-coated side-polished dual-core photonic crystal fiber polarization converter is shown in figure 1 As shown, the fiber cladding is composed of multi-layer air holes 11 arranged in a hexagonal array, and two fiber cores 12 and 13 of the same size are located on both sides of the central air holes 14 and 15 arranged symmetrically up and down. There are two elliptical air holes 16 next to the two fiber cores. The air holes and the fiber core are multiple axial air holes, and the cladding background material 17 is silicon dioxide. The photonic crystal fiber is polished to form a D-shaped structure, so that the central air hole 14 close to the polished surface is opened, figure 2 It is a composite structure of a graphene coating layer 21 and a PMMA coating layer 22 on the surface of the open central air hole 14 .

[0020] In the example of a graphene-coated side-polished dual-core photonic crystal fiber polarization converter, as the chemica...

Embodiment 2

[0022] The cross-section of a graphene-coated side-polished dual-core photonic crystal fiber polarization converter is shown in figure 1 As shown, the fiber cladding is composed of multi-layer air holes 11 arranged in a hexagonal array, and two fiber cores 12 and 13 of the same size are located on both sides of the central air holes 14 and 15 arranged symmetrically up and down. There are two elliptical air holes 16 next to the two fiber cores. The air holes and the fiber core are multiple axial air holes, and the cladding background material 17 is silicon dioxide. The photonic crystal fiber is polished to form a D-shaped structure, so that the central air hole 14 close to the polished surface is opened, figure 2 It is a composite structure of a graphene coating layer 21 and a PMMA coating layer 22 on the surface of the open central air hole 14 .

[0023] In the graphene-coated side-polished dual-core photonic crystal fiber polarization converter in the example, due to the d...

Embodiment 3

[0025] The cross-section of a graphene-coated side-polished dual-core photonic crystal fiber polarization converter is shown in figure 1 As shown, the fiber cladding is composed of multi-layer air holes 11 arranged in a hexagonal array, and two fiber cores 12 and 13 of the same size are located on both sides of the central air holes 14 and 15 arranged symmetrically up and down. There are two elliptical air holes 16 next to the two fiber cores. The air holes and the fiber core are multiple axial air holes, and the cladding background material 17 is silicon dioxide. The photonic crystal fiber is polished to form a D-shaped structure, so that the central air hole 14 close to the polished surface is opened, figure 2 It is a composite structure of a graphene coating layer 21 and a PMMA coating layer 22 on the surface of the open central air hole 14 .

[0026] In the example, the graphene-coated side-polished dual-core photonic crystal fiber polarization converter changes the che...

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Abstract

The invention, which relates to the technical field of special optical fibers and optical fiber communication, discloses a grapheme-coated side-polishing double-core photonic crystal fiber polarization converter. The polarization converter based on the side-polishing double-core photonic crystal fiber comprises a cladding structure formed by multi-layer air holes (11), two fiber cores (12) and (13), central air holes (14) and (15) arranged near the fiber cores, and two elliptical air holes (16). The background material (17) of the cladding layer is made of a silicon dioxide material. The fiberis polished to form a D-shaped structure and thus the central air hole (14) is opened and the inner surface of the central air hole is coated with a composite layer structure with a graphene layer and a polymethyl methacrylate layer (PMMA). After voltage loading and adjustment of the chemical potential of the coated graphene layer, the output optical power of different polarization directions ischanged and thus a certain extinction ratio is reached to realize polarization conversion. The converter having characteristics of all-fiber structure, small size, high polarization extinction ratio and the like can be applied to the all-optical communication field.

Description

[0001] The invention relates to the technical fields of special optical fiber and optical fiber communication, and discloses a graphene-coated side-polished dual-core photonic crystal fiber polarization converter. Background technique [0002] Polarizing beam splitters and polarization converters are important components in integrated optoelectronic circuits. The incident light can be split into two orthogonally polarized lights by a polarizing beam splitter and output from two different output ports. The light beam passes through the polarization converter, which can produce a 90° conversion of the polarization mode of its output light. Polarization beam splitters and polarization converters are widely used in optical fiber communication, optical fiber sensing, photoelectric detection and other fields. [0003] As a microstructure fiber, photonic crystal fiber (PCF) has the advantages of controllable birefringence, low loss, large mode field area and infinite single-mode tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02G02B27/28G02F1/01
Inventor 裴丽王坚凯吴良英
Owner BEIJING JIAOTONG UNIV
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