一种具有大有效折射率差和低色散的光子晶体光纤。

A Photonic crystal fiber with large effective refractive index separation and low dispersion.

机构信息

Engineering Research Center of Optical Instrument and System, Ministry of Education, Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, Shanghai, People's Republic of China.

出版信息

PLoS One. 2020 May 14;15(5):e0232982. doi: 10.1371/journal.pone.0232982. eCollection 2020.

DOI:10.1371/journal.pone.0232982

PMID:32407381

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7224559/

Abstract

A photonic crystal fiber (PCF) structure with a ring-core and 5 well-ordered semiellipse air-holes has been creatively proposed. Through a comparison between the structures with a high refractive index (RI) ring-core and the structure without, it conclude that a PCF with a high RI ring-core can work better. Schott SF57 was elected as the substrate material of ring-core. This paper compares the effects of long-axis and short-axis changes on the PCF and selects the optimal solution. Especially TE0,1 mode's dispersion is maintained between 0 and 3 ps / (nm · km) ranging from 1.45 μm to 1.65 μm. This property can be used to generate a supercontinuum with 200 μm long zero dispersion wavelength (ZDM). In addition, Δneff reaches up to 10-3, which enables the near -degeneracy of the eigenmodes to be almost neglected. The proposed PCF structure will have great application value in the field of optical communications.

摘要

一种具有环芯和 5 个有序半椭圆空气孔的光子晶体光纤（PCF）结构被创造性地提出。通过比较具有高折射率（RI）环芯的结构和没有环芯的结构，得出结论：具有高 RI 环芯的 PCF 可以更好地工作。选择 Schott SF57 作为环芯的基底材料。本文比较了长轴和短轴变化对 PCF 的影响，并选择了最佳解决方案。特别是 TE0,1 模式的色散在 1.45μm 至 1.65μm 范围内保持在 0 到 3 ps /（nm·km）之间。这种特性可用于产生具有 200μm 长零色散波长（ZDM）的超连续谱。此外，Δneff 高达 10-3，使得本征模的近简并几乎可以忽略不计。所提出的 PCF 结构在光通信领域将具有巨大的应用价值。