A polarization-maintaining hollow-core fiber
A technology of hollow-core fiber and fiber core, which is applied in the direction of polarization fiber, multi-layer core/cladding fiber, cladding fiber, etc.
Active Publication Date: 2019-12-27
BEIJING UNIV OF TECH
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Problems solved by technology
However, there is no research on the polarization-maintaining performance of the hollow-core fiber in the prior art, so it is urgent to design a hollow-core fiber with polarization-maintaining performance to expand the application range of the hollow-core fiber
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[0025] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0026] An embodiment of the present invention provides a polarization-maintaining hollow-core fiber, comprising: a cladding region and a core region determined by the cladding region; the cladding region includes a plurality of sub-cladding regions; relative to the The thickness of the sub-cladding region on any two positions symmetrical to the core region is the same; for the orthogonal direction of the straight line where the arbitrary two positions are located, the two symmetrical parts in the perpendicular direction relative to the core region The thickness of the sub-cladding region at the position is different from the thickness of the sub-cladding region at any two ...
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The invention provides a polarization-maintaining hollow fiber, comprising a cladding area and a fiber core area determined by the cladding area. The cladding area comprises a plurality of slave cladding areas. The slave cladding areas at any two positions which are symmetrical relative to the fiber core area have the same thickness. As for the orthogonal direction of the line of any two positions, the slave cladding areas at two positions which are symmetrical relative to the fiber core area along the orthogonal direction have different thickness as that of the slave cladding areas at any twopositions. The refractive index of the cladding area is greater than that of the fiber core area. The invention is advantageous in that the hollow fiber having the function of polarization maintaining can be realized through the cladding areas having different thicknesses along the orthogonal direction, and the polarization-maintaining hollow fiber can be widely applied in high-quality fiber gyroscopes, precise interference sensing, quantum calculating, atomic spectrums, and polarization-maintaining optical amplifiers.
Description
technical field [0001] The invention relates to the technical field of optics and laser optoelectronics, and more specifically, to a polarization-maintaining hollow-core optical fiber. Background technique [0002] At present, due to two inherent defects of solid-core optical fibers, namely, end face reflection loss and high hot spot loss due to structural inhomogeneity and defects in the optical fiber, these two inherent losses limit the application of solid-core optical fibers. Therefore, research on hollow-core fiber (Hollow-core Fiber, HCF) has gradually become a hot spot. The advantage of using a hollow-core fiber instead of the traditional doped high-purity silicon core is that the performance of the fiber is not limited by the characteristics of the core material. Parameters such as damage threshold, attenuation, nonlinear effects, and group velocity dispersion of traditional optical fibers are all affected by the corresponding parameters of silicon materials. Throu...
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IPC IPC(8): G02B6/024G02B6/032G02B6/02G02B6/036
CPCG02B6/02342G02B6/024G02B6/032G02B6/036G02B6/02328
Inventor 汪滢莹汪晓聪丁伟高寿飞王璞
Owner BEIJING UNIV OF TECH