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Polarization maintaining optical fiber with microstructure

A polarization-maintaining optical fiber and microstructure technology, applied in polarized optical fiber, cladding optical fiber, optical waveguide light guide, etc., can solve problems such as inability to transmit optical fiber, and achieve the effect of rich dispersion characteristics and large core area

Inactive Publication Date: 2007-12-26
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main idea is to use the difference in the effective refractive index of the two polarization modes of the fiber, so that one of the polarization modes cannot be transmitted in the fiber because the effective refractive index is smaller than the effective refractive index of the cladding (J.Lightwave Technol.vol.24 , 825-830, 2006)

Method used

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  • Polarization maintaining optical fiber with microstructure
  • Polarization maintaining optical fiber with microstructure
  • Polarization maintaining optical fiber with microstructure

Examples

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Embodiment 1

[0038] FIG. 1 is a schematic cross-sectional view of a microstructure core fiber with high birefringence and large mode field characteristics, and FIG. 2 is an enlarged schematic view of the core structure of the fiber. The fiber core of the optical fiber is composed of a dielectric material 1 and air holes 2 in the core area, wherein the air holes are arranged in a rectangular shape, so that the fiber core has second-order symmetry. The holes 4 in the cladding region are also air holes. The diameter of the fiber core is 7.44 μm, the vertical spacing of the air holes 2 in the core area is 0.93 μm, and the horizontal spacing is 0.537 μm, that is, when the light wavelength is 1.55 μm, the corresponding spacing is 0.6 and 0.35 light wavelengths respectively. The diameter of the air hole is taken as 0.242 μm. The pitch of the air holes in the cladding is taken as 9.3 μm, and the diameter of the air holes is taken as 3.72 μm. Pure quartz and doped quartz (such as doped GeO 2 ) a...

Embodiment 2

[0040] Fig. 3 is a schematic cross-sectional view of a microstructure core fiber with large mode field and single polarization characteristics. The fiber core of the optical fiber is composed of a dielectric material 1 and air holes 2 in the core area, wherein the air holes are arranged in a rectangular shape, so that the fiber core has second-order symmetry. The holes 4 in the cladding region are also air holes. The diameter of the core area is 10.54 μm, the longitudinal spacing of the air holes 2 in the fiber core area is 1.054 μm, and the lateral spacing is 0.609 μm, that is, when the light wavelength is 1.55 μm, the corresponding spacing is 0.68 and 0.39 light wavelengths respectively. The diameter of the air hole is taken as 0.274 μm. The distance between the air holes in the cladding is 10.54 μm, and the diameter of the air holes is taken as 4.216 μm. Pure quartz and doped quartz (such as doped GeO 2 ) as the dielectric material 1 of the fiber cladding dielectric mate...

Embodiment 3

[0042] FIG. 4 is a schematic cross-sectional view of a microstructured solid-core optical fiber with high birefringence and large mode field characteristics, and FIG. 5 is an enlarged schematic view of the fiber core. The core of the optical fiber is composed of a dielectric material 1 in the core area and another solid material filled into the holes 2, wherein the holes 2 are arranged in a rectangular shape, but the longitudinal holes are connected to each other, so that the The ratio of the total area of ​​the holes to the total area of ​​the core is relatively large, so that the core has a high birefringence. The holes 4 in the cladding region are air holes. The diameter of the core area is 9.3 μm, the longitudinal spacing of the holes in the core area is 0.93 μm, and the lateral spacing is 0.537 μm, that is, when the light wavelength is 1.55 μm, the corresponding spacing is 0.6 and 0.35 light wavelengths respectively. The diameter of the hole is taken as 0.537 μm. The pi...

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Abstract

A polarization preserving fiber of microstructure mode is prepared for forming fiber core by media material 1 and hole 2 being cyclically arranged, obtaining refractivity relation of n1 >n3 >n2 for media material 3 when cladded layer is only prepared by media material 3 and obtaining refractivity relation of n3 >n4 and n1>n3 >n2 for media material 3 and hole 4 being cyclically arranged when cladded layer is prepared by media material 3 and hole 4 being cyclically arranged.

Description

technical field [0001] The invention relates to the field of optical fiber communication, in particular to a microstructure polarization maintaining optical fiber, the international patent classification number is intended to be Int.Cl 7 .C03B 37 / 00. Background technique [0002] Polarization-maintaining fiber is an important class of fiber, which has important applications in many fields such as optical communication, optical signal detection and processing. It was mainly used for fiber optic sensing at first, and with the development of fiber optic communication technology, it has also been widely used in fiber amplifiers, fiber lasers, wavelength division multiplexing and polarization mode dispersion compensation. Polarization-maintaining fibers also play an important role in high-bit-rate optical communication systems because high-birefringence fibers can eliminate the effects of polarization mode dispersion. [0003] In recent years, it has been proposed to use photon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/024G02B6/02
Inventor 陈明阳
Owner JIANGSU UNIV
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