Low Bending Loss Nodeless Hollow-core Anti-Resonant Fiber

面向量子通信的嵌套反谐振无节点空芯光纤在近红外和短波红外波长的偏振纯度与色散特性

Polarization Purity and Dispersion Characteristics of Nested Antiresonant Nodeless Hollow-Core Optical Fiber at Near- and Short-wave-IR Wavelengths for Quantum Communications

本研究针对量子通信对高态纯度低损耗光传输的需求，探究1km长2μm波段嵌套反谐振无节点空芯光纤的偏振与脉冲传输特性，验证其在量子密钥分发等光量子技术中的应用潜力。

Ultralow loss hollow-core negative curvature fibers with nested elliptical antiresonance tubes

Hollow-core negative curvature fibers can confine light within air core and have small nonlinearity and dispersion and high damage threshold, thereby attracting a great deal of interest in the field of hollow core fibers. However, reducing the loss of hollow-core negative curvature fibers is a serious problem. On this basis, three new types of fibers with different nested tube structures are proposed in the near-infrared spectral regions and compared in detail with a previously proposed hollow-core negative curvature fiber. We used finite-element method for numerical simulation studies of thei…

几何参数对负曲率空芯光纤光学特性的影响

Impact of geometrical parameters on optical properties of negative curvature hollow-core fibers

分析了几何参数对负曲率空芯光纤的波导色散、波导损耗和传输带结构等重要光学特性的影响。我们从理论和实验两个方面研究了NCHCFs在弯曲条件下的共振效应和带边的形成。

1.4 μm 充 N2 空芯光纤高能窄线宽激光器

High energy and narrow linewidth N2-filled hollow-core fiber laser at 1.4 μm

提出基于充 N2 无节点反谐振空芯光纤的一阶振动拉曼 Stokes 激光器，在 1.4 μm 实现 26.5 μJ、0.16 nm 窄线宽及约 2 nm 调谐范围。

Nested-capillary anti-resonant silica fiber with mid-infrared transmission and low bending sensitivity at 4000 nm

We report a silica glass nested capillary anti-resonant nodeless fiber with transmission and low bending sensitivity in the mid-infrared around 4000 nm. The fiber is characterized in terms of transmission over 1700-4200 nm wavelengths, revealing a mid-infrared 3500-4200 nm transmission window, clearly observable for a 12 m long fiber. Bending loss around 4000 nm is 0.5 dB/m measured over 3 full turns with 40 mm radius, going up to 5 dB/m for full turns with 15 mm radius. Our results provide experimental evidence of hollow-core silica fibers in which nested, anti-resonant capillaries provide hi…

Angle-resolved hollow-core fiber-based curvature sensor

We propose and theoretically study a new hollow-core fiber-based curvature sensor with the capability of detecting both bending magnitude and angle (direction). The new sensor relies on a tubular-lattice fiber that encompasses, in its microstructure, tubes with three different thicknesses. By adequately choosing the placement of the tubes within the fiber cross-section, and by exploring the spectral shifts of the fiber transmitted spectrum due to the curvature-induced mode field distributions' displacements, we demonstrate a multi-axis bending sensor. In the proposed sensor, curvature radii an…