Bending-resistant single-mode photonic crystal fiber

Abstract

The invention relates to a bending-resistant single-mode photonic crystal fiber, the section of which comprises a triangular fiber core, an envelope formed by air holes with different diameters, and a circular substrate base, wherein the air holes in the envelope form an inner region and an outer region, the spacing between every two air holes is lambda; the inner envelope is formed by a circle of air holes with a diameter of d1, coated on the fiber core; and the outer envelope is formed by air holes with a diameter of d2, coating the inner envelope, wherein the d1 is more than d2. The bending-resistant single-mode photonic crystal fiber is characterized by ensuring that light is concentrated in the fiber core to be transmitted in a light transmission process due to the limit function of the triangular fiber core structure, the inner envelope layer and the outer envelope layer to light, and having the mode field area of the bending-resistant single-mode photonic crystal fiber in a range of 60mu m<2> to 90mu m<2>, being matched with the common single-mode fiber, and having better bending resisting performance. The bending-resistant single-mode photonic crystal fiber can be applied to a data center wiring system, a high-speed network, especially occasions of the fiber needing to be bent in a wiring process such as fiber to the home, and the like.

Description

technical field [0001] The invention relates to a photonic crystal fiber, in particular to a single-mode photonic crystal fiber with good bending resistance. technical background [0002] With the rapid development of communication network technology, high-bandwidth services such as high-definition television and online games have emerged as the times require. Loop) based broadband access network mode puts forward higher requirements. The G.652 optical fiber mainly used in the access network has become the focus of optical fiber network construction. However, the "last mile" problem in the access network, especially in the fiber-to-the-home process, has always been a bottleneck in the development of telecom networks. Due to the influence of complex application occasions such as streets, stairs, and room corners, numerous access points between households, and factors such as pulling and bending during wiring, the optical fiber of the access network is inevitably bent. This...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of large critical bending radius, high bending loss and low bending performance of common single-mode transmission optical fibers, and provides a bending-resistant single-mode photonic crystal optical fiber, which can not only match the mode field of ordinary single-mode optical fibers, Moreover, it effectively improves the bending resistance of optical fibers, and can be used in fields where optical fibers need to be bent and twisted, such as data center wiring systems, fiber-to-the-home, etc.

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