Liquid-filled double-core photonic crystal fiber

Abstract

The invention relates to the technical field of optical fibers and discloses a liquid-filled double-core photonic crystal fiber. The liquid-filled double-core photonic crystal fiber comprises two fiber cores and a wrapping layer arranged on the outer periphery of the two fiber cores and is characterized in that a plurality air holes are arranged in the wrapping layer along the length direction ofthe wrapping layer at intervals, the projection of the air holes on the cross section of the wrapping layer are distributed in rows, the odd-number row of the air holes comprises a plurality of firstair holes with circular cross sections, and the even-number row of the air holes comprises a plurality of second air holes with elliptical cross sections; the first fiber core which is formed by the wrapping layer part between the two first air holes closest to the center of the wrapping layer is formed in the row of first air holes closest to the central axis of the cross section of the wrappinglayer, and the second fiber core which is formed by the wrapping layer part between the two first air holes closest to the center of the wrapping layer is formed in the other row of first air holes closest to the central axis of the cross section of the wrapping layer. The liquid-filled double-core photonic crystal fiber is short in coupling length, high in extinction ratio and quite suitable forbeing used to manufacture a polarization beam splitter and a coupler unrelated to polarization.

Description

technical field [0001] The invention relates to the field of optical fiber technology, in particular to a liquid-filled double-core photonic crystal optical fiber. Background technique [0002] As a new type of optical fiber, photonic crystal fiber has attracted people's attention due to its unique performance and flexible structure design. Its properties such as endless single mode, large mode field area and high nonlinearity are widely used in the field of optical fiber sensing and optical communication devices. With the deepening of photonic crystal fiber research, a large number of optical communication devices based on photonic crystal fiber have been reported, and dual-core photonic crystal fiber is one of the hot spots. Dual-core photonic crystal fiber can be used as a key component in optical communication—polarization beam splitter. The current commercial beam splitters have the disadvantages of narrow bandwidth, long physical length, and low splitting ratio, whic...

AI Technical Summary

Problems solved by technology

The current commercial beam splitters have the disadvantages of narrow bandwidth, long physical length, and low splitting ratio, which are difficult to meet the needs of large and large-capacity optical communication networks.

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