Low-crosstalk groove embedded air hole dual-auxiliary type multi-core few-mode optical fiber

Abstract

The invention discloses a low-crosstalk groove embedded air hole dual-auxiliary type multi-core few-mode optical fiber, which comprises a plurality of few-mode fiber cores, wherein each few-mode fibercore is sequentially provided with an inner wrapping layer and a groove area from inside to outside, air holes are embedded in the groove areas, and the few-mode fiber core is further provided with an outer wrapping layer surrounding all the structures. According to the low-crosstalk groove embedded air hole dual-auxiliary type multi-core few-mode optical fiber, a space channel of the multi-coreoptical fiber and the few-mode optical fibers is utilized, the air hole isolation and groove dual-auxiliary type structural design is adopted, light beams are well limited in the fiber core, adverse effects on the structural stability of the optical fiber due to excessive hollow structures are avoided, the optical fiber structure parameters are reasonably changed, the core spacing is reduced, theinter-core crosstalk is reduced, the transmission capacity and efficiency of an optical communication network are improved, and the optical fiber transmission quality is improved.

Description

technical field [0001] The invention relates to a double-assisted multi-core few-mode optical fiber with air holes embedded in a low-crosstalk groove, belonging to the field of communication optical fibers. Background technique [0002] Space-division multiplexing technology is a key technology for improving the capacity of optical network systems and building next-generation optical communication networks. As the carrier of space-division multiplexing technology, multi-core few-mode optical fiber is an important direction for the development of high-speed and large-capacity networks in the future. However, many problems are still faced in the actual application of optical network links. The design optimization of multi-core optical fibers and the use of limited stable modes transmitted in few-mode optical fibers as independent channels in optical fiber communication systems to transmit information. Compared with single-mode fiber, the transmission capacity and transmission...

AI Technical Summary

Problems solved by technology

There are two main single-hole auxiliary structures. One is to arrange a layer of air holes around the core of the conventional multi-core optical fiber. Although this structure reduces the inter-core crosstalk to a certain extent, its core distance and step The core fiber is basically the same; the other is a multi-core fiber with a photonic crystal fiber structure. This structure can significantly reduce crosstalk between cores at a small core spacing, but it has too many hollow structures and is unstable. The actual preparation of the

Due to the limitations of the doping process of the single trench-assisted structure, the refractive index of the sunken layer cannot be sufficiently reduced, which limits the effect of crosstalk reduction

Images