Anti-torsion solid-core polarization-maintaining photonic crystal fiber based on stress distribution anisotropy

A photonic crystal fiber, anisotropic technology, applied in the direction of polarization fiber, cladding fiber, microstructure fiber, etc., can solve the problems of hindering the fiber optic gyroscope, increasing the cost of preparation, increasing the volume and quality of the fiber optic gyroscope, etc.

Active Publication Date: 2020-10-30
BEIHANG UNIV
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Problems solved by technology

At present, the solution to the above problems is mainly to cover the optical fiber ring with a magnetic shield, but this will increase the manufacturing cost, increase the volume and quality of the fiber optic gyroscope, and hinder the development of the fiber optic gyroscope in the direction of light and small

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  • Anti-torsion solid-core polarization-maintaining photonic crystal fiber based on stress distribution anisotropy
  • Anti-torsion solid-core polarization-maintaining photonic crystal fiber based on stress distribution anisotropy
  • Anti-torsion solid-core polarization-maintaining photonic crystal fiber based on stress distribution anisotropy

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Embodiment 1

[0036] Such as Figure 4 As shown, the cladding inner region S of the photonic crystal fiber based on the stress distribution anisotropy of embodiment 1 内 It is a three-layer periodic and evenly distributed air hole area arranged around the fiber core, and the outer layer area S 外 is the area between the inner zone and the cladding wall. where the inner region S 内 The inner layer structure uses two larger micron-sized air holes on the x-axis to form shape birefringence. Preferably, the diameter of the micron-sized air holes is 4-6 μm, and the outer region S 外 The outer structure of is mainly distributed on the y-axis, where the x-axis points to the horizontal direction and the y-axis points to the vertical direction. Considering the feasibility of stacking capillaries in the preparation process, the air holes in the outer area are arranged in a honeycomb structure, and the inner area S 内 and the outer region S 外 The overall structure is symmetrical about both the x-axis a...

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Abstract

The invention belongs to the field of optical fiber sensing, and particularly relates to an anti-torsion solid-core polarization-maintaining photonic crystal fiber based on stress distribution anisotropy. A cladding comprises an inner layer area arranged around a fiber core and an outer layer area located between the inner layer area and the outer wall of the cladding; the inner layer area is provided with a plurality of layers of air holes for constructing optical characteristics, and the center of the inner layer area is provided with two micron-sized air holes arranged along the x axis to form shape birefringence; the outer layer area comprises a plurality of layers of air holes arranged in the radial direction of the y axis; and the bending strength of the photonic crystal fiber alongthe x-axis and the y-axis is different by adjusting one or more of the aperture size, the number and the arrangement mode of the multiple layers of air holes in the outer layer area. On the basis of ensuring that the optical characteristics of the fiber meet the requirements, the photonic crystal fiber has certain torsion resistance based on the anisotropy of stress distribution in the radial direction, and the non-reciprocal phase difference generated by the magneto-optical Faraday effect can be reduced.

Description

technical field [0001] The invention belongs to the field of optical fiber sensing, in particular to a torsion-resistant solid-core polarization-maintaining photonic crystal optical fiber based on stress distribution anisotropy. Background technique [0002] The cladding of photonic crystal fiber is different from that of traditional optical fiber. It is composed of air holes arranged according to certain rules. By designing the structural parameters such as the number, size, and spacing of air holes in the cladding, the equivalent refractive index of the cladding can be adjusted to obtain different Light waves with propagation characteristics to meet different characteristics and needs. Due to the high design freedom of the photonic crystal fiber, by setting the array of air holes arranged according to certain rules, it is possible to manufacture a high birefringence solid-core polarization-maintaining photonic crystal fiber that meets the requirements of the fiber optic gy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02G02B6/024G01C19/72
CPCG02B6/02295G02B6/02304G02B6/02366G02B6/024G01C19/721G02B6/02338G02B6/02357G02B6/02323G02B6/02347G02B6/02371
Inventor 宋镜明宋凝芳郭治宇张春熹张祖琛李彦
Owner BEIHANG UNIV
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