相关实验视频
Updated: May 7, 2026
08:48
Writing Bragg Gratings in Multicore Fibers
Published on: April 20, 2016
8.6K
扭曲纤维布拉格格作为一个极化不敏感的元素
Oleg V Butov1,2, Alexey I Lopunov1,2, Ivan Ulyanov3
1Kotelnikov Institute of Radioengineering and Electronics of RAS, Moscow 125009, Russia.
Sensors (Basel, Switzerland)
|January 10, 2026
概括
这项研究引入了一种新的方法,用于使用秒激光器在预先扭曲的光纤中创建布拉格格. 这种技术显著降低了极化依赖,提高了高精度纤维布拉格格子传感器的性能.
科学领域:
- 光子学和光学工程 光子学和光学工程
- 材料科学 材料科学 材料科学
背景情况:
- 纤维布拉格网格 (FBGs) 是重要的光学元件.
- 偏振依赖性限制了FBG传感器的精度.
- 当前的制造方法往往导致极化敏感格子.
研究的目的:
- 开发一种原创的方法来制造布拉格格,使偏振依赖性最小化.
- 研究在预先扭曲的光纤中刻入布拉格结构的有效性.
- 为了提高FBG的性能,用于高精度传感应用.
主要方法:
- 使用了点对点制造技术.
- 使用 femtosecond 激光辐射进行铭文.
- 引入了一个预先扭曲的光纤结构来嵌入布拉格格.
主要成果:
- 证明了布拉格格的极化依赖性显著减少.
- 反射水平的偏振依赖度至少下降了一个数量级.
- 与直线FBG相比,布拉格波长的偏振依赖度减少了三倍.
结论:
- 提出的方法有效地减少了布拉格格中的偏振依赖.
- 预先扭曲的纤维布拉格格提供了更好的稳定性和精度.
- 这种技术适用于生产各种应用的高精度布拉格传感器.
相关概念视频
01:01Group Polarization
Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.
01:15Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...