Dual-core photonic crystal fiber polarization beam splitter

Abstract

The invention discloses a dual-core photonic crystal fiber polarization beam splitter which comprises a fiber core area and a cladding area. The cladding area is located on the outer layer of the fiber core area, and the fiber core area and the cladding area are filled with a pure quartz glass substrate material; the fiber core area comprises a first air hole, a first fiber core and a second fibercore, the first air hole is located in the center of the fiber core area, and a gold film is arranged on the inner side of the first air hole; the first fiber core and the second fiber core are positioned on two sides of the first air hole; and the cladding area comprises a plurality of second air holes, and the plurality of second air holes surround the fiber core area and are arranged in a hexagonal shape. Compared with an existing beam splitter, the dual-core photonic crystal fiber polarization beam splitter is shorter in length and wider in communication wave band, the defects that an existing beam splitter is large in size, low in extinction ratio, narrow in bandwidth and the like are overcome, the requirement for a super-large-capacity all-optical network easy to integrate in the future is met, and the dual-core photonic crystal fiber polarization beam splitter is easy to produce and controllable in cost.

Description

technical field [0001] The invention relates to the technical field of photonic crystal fiber beam splitters, in particular to a dual-core photonic crystal fiber polarization beam splitter. Background technique [0002] Polarizing beam splitters have the function of separating a beam of light with two polarization states, and are therefore widely used in optical communication systems as an important optical component. Most of the early polarization beam splitters were prepared from traditional dual-core optical fibers based on the principle of birefringence. However, traditional optical fibers often have small birefringence, so the prepared beam splitters generally have the disadvantages of large volume, low extinction ratio, narrow bandwidth, and single structural design, which limits the integration and transmission capacity of optical communication systems. In addition, polarization beam splitters based on traditional optical fibers have wavelength-dependent characterist...

AI Technical Summary

Problems solved by technology

[0008] The invention provides a dual-core photonic crystal fiber polarization beam splitter to solve the technical problems of the existing photonic crystal fiber polarization beam splitter with large volume, complex preparation process and high cost

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