Single-mode single-polarization hollow negative curvature optical fiber

Abstract

The invention discloses a single-mode single-polarization hollow negative curvature optical fiber. The invention discloses a hollow negative curvature optical fiber, which belongs to the technical field of hollow negative curvature optical fibers and comprises an outer cladding, four cladding tubes, a fiber core area, nesting tubes and a fiber core, wherein the four cladding tubes are uniformly arranged around the circle center of the outer cladding and cling to the inside of the outer cladding; the nesting tubes are respectively arranged in the cladding tubes and uniformly arranged around thecircle center of the outer cladding; the outer diameters of the four cladding tubes are equal, the wall thicknesses of the two cladding tubes in the Y direction are the same, the wall thicknesses ofthe two cladding tubes in the X direction are the same, the wall thickness of the cladding tubes in the Y direction is larger than that of the cladding tubes in the X direction, and the gaps between the adjacent cladding tubes in the circumferential direction are equal; the nesting tubes are tightly attached to the interiors of the cladding tubes and correspond to the position where the outer cladding is tightly attached to the cladding tubes; and the core area and other internal spaces are filled with air. At the working wavelength, the single-mode characteristic is good, the material is purequartz, the structure is simple, the effective mode field area is large, and the manufacturing efficiency is high.

Description

technical field [0001] The invention relates to the technical field of hollow-core negative-curvature optical fibers, in particular to a single-mode single-polarization hollow-core negative-curvature optical fiber, which belongs to the single-mode single-polarization microstructure optical fiber. Background technique [0002] When the optical energy or optical signal propagates in the optical fiber, due to the incompleteness of the optical fiber structure or the surface unevenness, it is easy to cause the dispersion of the polarization mode and affect the stability of the optical device function. Therefore, someone proposed a single-mode single-polarization fiber. The principle is that the polarization mode loss on one axis is very high and cannot propagate in the fiber; the polarization mode loss on the other axis is very low and can normally propagate in the fiber, ensuring optical fiber The energy or optical signal is output stably under the conditions of fiber bending or...

AI Technical Summary

Problems solved by technology

At present, although a variety of hollow-core negative-curvature fibers have been produced, few people have studied single-mode single-polarization hollow-core negative-curvature fibers.

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