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Journal articles on the topic 'Hollow-core fibers'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Journal, Baghdad Science. "Dispersion in a Gas Filled Hollow Core Photonic Crystal Fiber." Baghdad Science Journal 11, no. 3 (2014): 1250–56. http://dx.doi.org/10.21123/bsj.11.3.1250-1256.

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Hollow core photonic bandgap fibers provide a new geometry for the realization and enhancement of many nonlinear optical effects. Such fibers offer novel guidance and dispersion properties that provide an advantage over conventional fibers for various applications. Dispersion, which expresses the variation with wavelength of the guided-mode group velocity, is one of the most important properties of optical fibers. Photonic crystal fibers (PCFs) offer much larger flexibility than conventional fibers with respect to tailoring of the dispersion curve. This is partly due to the large refractive-in

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2

Taher, Hanan J. "Dispersion in a Gas Filled Hollow Core Photonic Crystal Fiber." Baghdad Science Journal 11, no. 3 (2014): 1250–56. http://dx.doi.org/10.21123/bsj.2014.11.3.1250-1256.

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Hollow core photonic bandgap fibers provide a new geometry for the realization and enhancement of many nonlinear optical effects. Such fibers offer novel guidance and dispersion properties that provide an advantage over conventional fibers for various applications. Dispersion, which expresses the variation with wavelength of the guided-mode group velocity, is one of the most important properties of optical fibers. Photonic crystal fibers (PCFs) offer much larger flexibility than conventional fibers with respect to tailoring of the dispersion curve. This is partly due to the large refractive-in

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3

Chen, Xin, Jason E. Hurley, John L. Nord, et al. "Measurements of Group Delay and Chromatic Dispersion of Hollow-Core Fiber Using a Frequency Domain Method." Photonics 12, no. 1 (2025): 47. https://doi.org/10.3390/photonics12010047.

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Although hollow-core fibers are intended to be single-mode, they can potentially carry slightly higher-order mode content depending on the specific fiber structure. The presence of one or more higher-order modes makes the measurement of group delay and chromatic dispersion difficult if one relies on an instrument that is designed to work with single-mode fiber, in particular, a commercial instrument. In this work, we present the measurements of hollow-core fibers using a frequency domain method by acquiring the complex transfer function over a range of modulation frequencies. The measurement t

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4

Deng, Ang, and Wonkeun Chang. "Geometrical Scaling of Antiresonant Hollow-Core Fibers for Mid-Infrared Beam Delivery." Crystals 11, no. 4 (2021): 420. http://dx.doi.org/10.3390/cryst11040420.

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We numerically investigate the effect of scaling two key structural parameters in antiresonant hollow-core fibers—dielectric wall thickness of the cladding elements and core size—in view of low-loss mid-infrared beam delivery. We demonstrate that there exists an additional resonance-like loss peak in the long-wavelength limit of the first transmission band in antiresonant hollow-core fibers. We also find that the confinement loss in tubular-type hollow-core fibers depends strongly on the core size, where the degree of the dependence varies with the cladding tube size. The loss scales with the

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Xu, Ding Jie, Hong Ru Song, Wei Wang, and Yue Fan. "The Optimization Research on Hollow-Core Photonic BandgapFiber CoreTransversal Radius." Advanced Materials Research 884-885 (January 2014): 370–73. http://dx.doi.org/10.4028/www.scientific.net/amr.884-885.370.

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In hollow-core optical fibers, surface mode is one most important reasons causes fiber loss. In order to suppress surface mode loss, simulations of the designed hollow-core optical fibers have been made numerically using full vector finite element method, and the light intensity distributions are in the different core transversal radius is obtained. Analysis results show that both the enlargement of core radius and using fusing transversal method lead into the core holeare more helpful to suppress surface mode loss. This conclusion may provide a basis for small duty cycle (f< 85%) hollow-co

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Guo, Fengyun, Ziyi Guo, Lei Gao, et al. "Electrospun Core-Shell Hollow Structure Cocatalysts for Enhanced Photocatalytic Activity." Journal of Nanomaterials 2021 (May 25, 2021): 1–7. http://dx.doi.org/10.1155/2021/9980810.

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The core-shell NaYF4/Yb/Tm/TiO2 hollow composite fibers were prepared by coaxial electrospinning and high-temperature calcination. The composite fibers exhibit excellent photocatalytic activity under the dual synergistic of regulating the core-shell hollow microstructure and the composition by doping nanoparticles. Compared with commercial P25 and hollow fiber without nanoparticles, the degradation efficiency of rhodamine B using the core-shell composite fiber was significantly improved up to 99%. Moreover, the nanoparticles in the composite fibers can exist stably and maintain good structure

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Yu, Ruowei, Yuxing Chen, Lingling Shui, and Limin Xiao. "Hollow-Core Photonic Crystal Fiber Gas Sensing." Sensors 20, no. 10 (2020): 2996. http://dx.doi.org/10.3390/s20102996.

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Fiber gas sensing techniques have been applied for a wide range of industrial applications. In this paper, the basic fiber gas sensing principles and the development of different fibers have been introduced. In various specialty fibers, hollow-core photonic crystal fibers (HC-PCFs) can overcome the fundamental limits of solid fibers and have attracted intense interest recently. Here, we focus on the review of HC-PCF gas sensing, including the light-guiding mechanisms of HC-PCFs, various sensing configurations, microfabrication approaches, and recent research advances including the mid-infrared

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8

Belardi, Walter, and Pier John Sazio. "Borosilicate Based Hollow-Core Optical Fibers." Fibers 7, no. 8 (2019): 73. http://dx.doi.org/10.3390/fib7080073.

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We discuss the fabrication of hollow-core optical fibers made of borosilicate glass. We show that, despite the high attenuation of the glass relative to silica, the fiber optical losses can be of the same order of magnitude of those obtained by using ultrapure silica glass. Short lengths of the fabricated fibers, used in combination with incoherent optical sources, provide single-mode optical guidance in both near and mid-infrared spectral ranges without any additional optical components.

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Belardi, Walter. "Hollow-Core Optical Fibers." Fibers 7, no. 5 (2019): 50. http://dx.doi.org/10.3390/fib7050050.

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10

Komanec, M., D. Dousek, D. Suslov, and S. Zvanove. "Hollow-Core Optical Fibers." Radioengineering 29, no. 3 (2020): 417–30. http://dx.doi.org/10.13164/re.2020.0417.

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11

Konorov, S. O., A. B. Fedotov, L. A. Mel'nikov, A. V. Shcherbakov, R. B. Miles, and A. M. Zheltikov. "Coherent Raman protocol of biosensing with a hollow photonic-crystal fiber." Journal of X-Ray Science and Technology: Clinical Applications of Diagnosis and Therapeutics 13, no. 4 (2005): 163–69. http://dx.doi.org/10.3233/xst-2005-00137.

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A nonlinear-optical protocol of biosensing is demonstrated with a hollow-core photonic-crystal fiber. This protocol involves phase-matched four-wave mixing of millijoule nanosecond laser pulses guided by photonic band gaps of hollow fibers with a two-dimensionally periodic cladding and a core diameter of about 50 μm. Raman resonances related to the stretching vibrations of water molecules inside the hollow fiber core are detected in the spectrum of the four-wave mixing signal, suggesting phase-matched coherent anti-Stokes Raman scattering in hollow photonic-crystal fibers as a convenient sensi

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12

Ni, Wenjun, Chunyong Yang, Yiyang Luo, et al. "Recent Advancement of Anti-Resonant Hollow-Core Fibers for Sensing Applications." Photonics 8, no. 4 (2021): 128. http://dx.doi.org/10.3390/photonics8040128.

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Specialty fibers have enabled a wide range of sensing applications. Particularly, with the recent advancement of anti-resonant effects, specialty fibers with hollow structures offer a unique sensing platform to achieve highly accurate and ultra-compact fiber optic sensors with large measurement ranges. This review presents an overview of recent progress in anti-resonant hollow-core fibers for sensing applications. Both regular and irregular-shaped fibers and their performance in various sensing scenarios are summarized. Finally, the challenges and possible solutions are briefly presented with

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Liu, Xuesong, Zhongwei Fan, Zhaohui Shi, Yunfeng Ma, Jin Yu, and Jing Zhang. "Dual-core antiresonant hollow core fibers." Optics Express 24, no. 15 (2016): 17453. http://dx.doi.org/10.1364/oe.24.017453.

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14

Carvalho, J. P., F. Magalhães, O. Frazão, J. L. Santos, F. M. Araújo, and L. A. Ferreira. "Splicing and Coupling Losses in Hollow-Core Photonic Crystal Glass Fibers." Solid State Phenomena 161 (June 2010): 43–49. http://dx.doi.org/10.4028/www.scientific.net/ssp.161.43.

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Hollow-core photonic crystal glass fibers have a high potential for gas sensing applications, since large light-gas interaction lengths can be effectively attained. Nevertheless, in order to enhance effective diffusion of gas into the hollow-core fiber, multi-coupling gaps are often needed, which raise coupling loss issues that must be evaluated prior to the development of practical systems. In this paper, a study on the coupling losses dependence on lateral and axial gap misalignment for single-mode fiber and two different types of hollow-core photonic crystal glass fibers is carried out. In

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Borzycki, Krzysztof, and Tomasz Osuch. "Hollow-Core Optical Fibers for Telecommunications and Data Transmission." Applied Sciences 13, no. 19 (2023): 10699. http://dx.doi.org/10.3390/app131910699.

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Hollow-core optical fibers (HCFs) have unique properties like low latency, negligible optical nonlinearity, wide low-loss spectrum, up to 2100 nm, the ability to carry high power, and potentially lower loss then solid-core single-mode fibers (SMFs). These features make them very promising for communication networks and similar applications. However, this class of fibers is still in development. Current applications are almost exclusively limited to low-latency data links for High-Speed Trading (HST); other uses are in the trial stage now. In this paper, we comprehensively review the progress i

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Krzempek, Karol, Krzysztof Abramski, and Michal Nikodem. "Kagome Hollow Core Fiber-Based Mid-Infrared Dispersion Spectroscopy of Methane at Sub-ppm Levels." Sensors 19, no. 15 (2019): 3352. http://dx.doi.org/10.3390/s19153352.

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In this paper, we demonstrate the laser-based gas sensing of methane near 3.3 µm inside hollow-core photonic crystal fibers. We exploit a novel anti-resonant Kagome-type hollow-core fiber with a large core diameter (more than 100 µm) which results in gas filling times of less than 10 s for 1.3-m-long fibers. Using a difference frequency generation source and chirped laser dispersion spectroscopy technique, methane sensing with sub-parts-per-million by volume detection limit is performed. The detection of ambient methane is also demonstrated. The presented results indicate the feasibility of us

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Alagashev, G. K., S. S. Stafeev, and A. D. Pryamikov. "Losses and orbital part of the Poynting vector of air-core modes in hollow-core fibers." Computer Optics 48, no. 2 (2024): 192–96. http://dx.doi.org/10.18287/2412-6179-co-1349.

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In our earlier works, we investigated a relationship between the formation of vortices in the transverse component of the Poynting vector of core modes and the regimes of strong localization of these modes in solid core micro-structured optical fibers. In this paper, we consider the behavior of the orbital part of the Poynting vector of fundamental and high-order modes in hollow-core fibers, and make comparisons with similar fundamental core mode behavior in solid core micro-structured optical fibers. We then demonstrated the impact of the “negative” curvature of the core-cladding boundary of

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18

Stawska, Hanna Izabela, and Maciej Andrzej Popenda. "A Dual Hollow Core Antiresonant Optical Fiber Coupler Based on a Highly Birefringent Structure-Numerical Design and Analysis." Fibers 7, no. 12 (2019): 109. http://dx.doi.org/10.3390/fib7120109.

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With the growing interest in hollow-core antiresonant fibers (HC-ARF), attributed to the development of their fabrication technology, the appearance of more sophisticated structures is understandable. One of the recently advancing concepts is that of dual hollow-core antiresonant fibers, which have the potential to be used as optical fiber couplers. In the following paper, a design of a dual hollow-core antiresonant fiber (DHC-ARF) acting as a polarization fiber coupler is presented. The structure is based on a highly birefringent hollow-core fiber design, which is proven to be a promising sol

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19

Nikodem, Michal. "Laser-Based Trace Gas Detection inside Hollow-Core Fibers: A Review." Materials 13, no. 18 (2020): 3983. http://dx.doi.org/10.3390/ma13183983.

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Thanks to the guidance of an optical wave in air, hollow-core fibers may serve as sampling cells in an optical spectroscopic system. This paper reviews applications of hollow-core optical fibers to laser-based gas sensing. Three types of hollow-core fibers are discussed: Hollow capillary waveguides, photonic band-gap fibers, and negative curvature fibers. Their advantages and drawbacks when used for laser-based trace gas detection are analyzed. Various examples of experimental sensing systems demonstrated in the literature over the past 20 years are discussed.

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20

Gladyshev, Alexey, Sergey Nefedov, Anton Kolyadin, et al. "Microwave Discharge in Hollow Optical Fibers as a Pump for Gas Fiber Lasers." Photonics 9, no. 10 (2022): 752. http://dx.doi.org/10.3390/photonics9100752.

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To excite plasma in the core of a hollow fiber, a scheme similar to a slot antenna in the wall of a metal microwave waveguide was proposed and implemented. An analytical estimate of the magnitude of the electric field in the slot region where the fiber with a hollow core is placed has been obtained. Using the proposed scheme, the possibility of maintaining argon plasma in the core of a hollow fiber with a diameter as small as 110 μm was demonstrated. The total length of plasma column in the hollow-core fiber was up to 25 cm at Ar pressure ~10 Torr. The frequency of microwave radiation used was

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21

SHIN, BU-GON, JOENG-HO PARK, and JANG-JOO KIM. "PLASTIC PHOTONIC CRYSTAL FIBERS DRAWN FROM STACKED CAPILLARIES." Journal of Nonlinear Optical Physics & Materials 13, no. 03n04 (2004): 519–23. http://dx.doi.org/10.1142/s0218863504002201.

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Solid and hollow core polymer photonic crystal fibers (PPCFs) were fabricated by drawing preforms of stacked capillaries made of polystyrene (PS). The PPCFs consist of a solid PS core or a hollow core surrounded by periodic air holes of a hexagonal symmetry running along the length of fiber. We have demonstrated the single mode propagation of light through the solid core PPCF at wavelengths of 1.33 and 1.55 μm.

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Palacio, Sebastian Vergara, and Rodrigo Acuna Herrera. "White light continuum in negative hollow-core fiber filled with inert gases." Journal of Nonlinear Optical Physics & Materials 28, no. 03 (2019): 1950029. http://dx.doi.org/10.1142/s0218863519500292.

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As of the writing of this work, generation of white light continuum (WLC) in hollow-core photonic crystal fibers (HCPCF) filled with gases is being thoroughly researched. These structures allow the possibility of adjusting light generation properties by changing the fill gas pressure. Kagomé hollow-core PCF and silica capillaries have been used to study the nonlinear effects in gases as they facilitate exploring these weak properties. In this paper, we numerically analyze the generation of WLC in a new type of hollow-core PCF, called negative curvature hollow-core fiber (NCHCF), itself filled

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23

Abdallah, Adel, Chao Zhu Zhang, and Zhi Zhong. "Acoustic Pressure Sensing with Hollow-Core Photonic Bandgap Fibers." Applied Mechanics and Materials 738-739 (March 2015): 61–64. http://dx.doi.org/10.4028/www.scientific.net/amm.738-739.61.

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Recently, photonic crystal fibers (PCFs) have attracted many researchers because of their special characteristics, and design flexibility that cannot be realized by conventional fibers. One of the important areas of research is the optical fiber hydrophones. In this paper, the finite element solver COMSOL multiphysics (FES) is used to study and compare the phase sensitivity to acoustic pressure of a hollow-core photonic band gap fiber (HC-PBF), and a conventional single-mode fiber (SMF) for various acoustic pressures in the frequency range from 10 kHz to 50 kHz. Simulation results of the inves

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24

Li, Lili, and Limin Xiao. "Second-Order Vector Mode Propagation in Hollow-Core Antiresonant Fibers." Micromachines 10, no. 6 (2019): 381. http://dx.doi.org/10.3390/mi10060381.

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Second-order vector modes, possessing doughnut-shaped intensity distribution with unique polarization, are widely utilized in material micromachining, optical tweezers, and high-resolution microscopy. Since the hollow-core fiber can act as a flexible and robust optical waveguide for ultra-short pulse delivery and manipulation, high-order vector modes guided in hollow-core fibers will have huge potential in many advanced applications. We firstly reveal that a second-order vector mode can be well guided in a hollow-core antiresonant fiber with the suppression of the fundamental mode and other se

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25

Bufetov, Igor, Alexey Kosolapov, Andrey Pryamikov, et al. "Revolver Hollow Core Optical Fibers." Fibers 6, no. 2 (2018): 39. http://dx.doi.org/10.3390/fib6020039.

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26

Ding, Haonan, Dora Juan Juan Hu, Xingtao Yu, Xiaoxian Liu, Yifan Zhu, and Guanghui Wang. "Review on All-Fiber Online Raman Sensor with Hollow Core Microstructured Optical Fiber." Photonics 9, no. 3 (2022): 134. http://dx.doi.org/10.3390/photonics9030134.

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Raman spectroscopy is widely used for qualitative and quantitative analysis of trace components in scientific fields such as food safety monitoring, drug testing, environmental monitoring, etc. In addition to its demonstrated advantages of fast response, non-destructive, and non-polluting characteristics, fast online Raman detection is drawing growing attention for development. To achieve this desirable capability, hollow core optical fibers are employed as a common transmission channel for light and fluid in the Raman sensor. By enhancing the interaction process between light and matter, the

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27

Hou, Kai, Yun Yin Lin, Benjamin S. Hsiao, and Mei Fang Zhu. "Continuous Production of Hollow Hydrogel Fibers with Graphene Inner Wall." Materials Science Forum 898 (June 2017): 2197–204. http://dx.doi.org/10.4028/www.scientific.net/msf.898.2197.

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Hydrogel fiber with spatiotemporal properties such as great aspect ratio, large surface area/volume ratio, orientation and knittability, has been considered as the potential application materials in the field of biomedicine area. On the basis of dynamic-crosslinking-spinning we reported before, a novel GO/PEG-PEGDA core-sheath hydrogel fiber was fabricated continuously. Moreover, uniform rGO-PEGDA hollow fiber was obtain after reduction process. The diameter of core and sheath can be controlled separately by adjusting extrusion rate of core solution and sheath solution, respectively. This nove

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28

Qi, Fei, Li Min Hu, Xin Yong Dong, Chun Liu Zhao, Shang Zhong Jin, and Chi Chiu Chan. "Simultaneous Measurement of Strain and Temperature with Hollow Core Fiber Based Intermodal Interferometer." Applied Mechanics and Materials 330 (June 2013): 231–36. http://dx.doi.org/10.4028/www.scientific.net/amm.330.231.

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A hollow core fiber based all-fiber intermodal interferometer is proposed for measurement of strain and temperature. The sensing structure is simply a short segment of hollow core silica fiber being spliced between two normal single mode fibers. The fabrication process only involves a conventional fusion splicer and a mechanical fiber cleaver. Experimental results show that sensitivities of-1.21 pm/με and 21.30 pm/°C are achieved for strain and temperature measurements, respectively.

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Zhang, Zili, Huajin Chen, Changxu Wang, and Yuan Li. "A Broadband Optical Fiber Coupler Based on Dual-Hollow Core Fiber." Journal of Physics: Conference Series 2517, no. 1 (2023): 012009. http://dx.doi.org/10.1088/1742-6596/2517/1/012009.

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Abstract Hollow fiber has become a research hotspot in the field of special fibers for its excellent characteristics, such as low loss, low delay, low dispersion, and low nonlinear coefficient. Due to the lack of fiber coupler matching hollow core fiber, the application development of hollow core fiber in the all-fiber integrated system is greatly hindered. Dual-core fiber is widely used in the development of fiber couplers because it can choose optical power, wavelength, and polarization state by the coupling between the two cores. For the urgent need for hollow core fiber coupler, the design

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30

Pryamikov, Andrey. "Local Energy Velocity of the Air-Core Modes in Hollow-Core Fibers." Photonics 10, no. 9 (2023): 1035. http://dx.doi.org/10.3390/photonics10091035.

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In this paper, we consider the behavior of the local energy flow velocity of the fundamental air-core mode at the core-cladding boundary in two types of hollow-core fibers: hollow-core fibers with a negative curvature of the core boundary and single-capillary fibers with similar geometrical parameters. It is demonstrated that the behavior of both axial and radial components of the local energy velocity of the fundamental air-core mode is completely different for these two types of hollow-core fibers. The negative curvature of the core boundary leads to an alternating behavior of the radial pro

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31

Sultana, Jakeya, Md Saiful Islam, Cristiano M. B. Cordeiro, et al. "Terahertz Hollow Core Antiresonant Fiber with Metamaterial Cladding." Fibers 8, no. 2 (2020): 14. http://dx.doi.org/10.3390/fib8020014.

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A hollow core antiresonant photonic crystal fiber (HC-ARPCF) with metal inclusions is numerically analyzed for transmission of terahertz (THz) waves. The propagation of fundamental and higher order modes are investigated and the results are compared with conventional dielectric antiresonant (AR) fiber designs. Simulation results show that broadband terahertz radiation can be guided with six times lower loss in such hollow core fibers with metallic inclusions, compared to tube lattice fiber, covering a single mode bandwidth (BW) of 700 GHz.

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32

Wang, Lidong, Meisong Liao, Fei Yu, et al. "Thermal Sensitivity of Birefringence in Polarization-Maintaining Hollow-Core Photonic Bandgap Fibers." Photonics 10, no. 2 (2023): 103. http://dx.doi.org/10.3390/photonics10020103.

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Polarization-maintaining (PM) fiber is the core sensitive component of a fiber optic gyroscope (FOG); its birefringence temperature stability is crucial for maintaining accuracy. Here, we systematically investigated the structural thermal deformation and the resulting birefringence variation in typical PM hollow-core photonic bandgap fibers (HC-PBGFs) for FOG according to varying fiber structure parameters. To verify the application potential of PM HC-PBGFs in FOG, we compared the thermal sensitivity of birefringence (TSB) with that of the commonly used Panda PM fiber, which was tested to 5.07

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Gérôme, Frédéric, Jonas H. Osório, Foued Amrani, Benoit Debord, and Fetah Benabid. "Tapered hollow-core photonic crystal fibers." EPJ Web of Conferences 266 (2022): 11005. http://dx.doi.org/10.1051/epjconf/202226611005.

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In this communication, we will first review the recent advances of hollow-core photonic crystal fibers. Then, the possibility offered to tailor their optical properties by making tapers will be discussed.

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Hayes, John R., Francesco Poletti, Mousavi S. Abokhamis, Natalie V. Wheeler, Naveen K. Baddela, and David J. Richardson. "Anti-resonant hexagram hollow core fibers." Optics Express 23, no. 2 (2015): 1289. http://dx.doi.org/10.1364/oe.23.001289.

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35

Cruz, Alice, Cristiano Cordeiro, and Marcos Franco. "3D Printed Hollow-Core Terahertz Fibers." Fibers 6, no. 3 (2018): 43. http://dx.doi.org/10.3390/fib6030043.

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36

Belardi, Walter, Pier J. Sazio, and Laurent Bigot. "Hollow core fibers for optical amplification." Optics Letters 44, no. 17 (2019): 4127. http://dx.doi.org/10.1364/ol.44.004127.

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37

Wang, Yu, Shijie Chai, Mingjie Xin, Wui Seng Leong, Zilong Chen, and Shau-Yu Lan. "Loading Dynamics of Cold Atoms into a Hollow-Core Photonic Crystal Fiber." Fibers 8, no. 5 (2020): 28. http://dx.doi.org/10.3390/fib8050028.

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Cold atoms trapped and guided in hollow-core photonic crystal fibers provide a scalable diffraction-free setting for atom–light interactions for quantum technologies. However, due to the mismatch of the depth and spatial extension of the trapping potential from free space to the fiber, the number of cold atoms in the fiber is mainly determined by the loading process from free space to waveguide confinement. Here, we provide a numerical study of the loading dynamics of cold atoms into a hollow-core photonic crystal fiber. We use the Monte Carlo method to simulate the trajectories of an ensemble

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38

Zeisberger, Matthias, Alexander Hartung, and Markus Schmidt. "Understanding Dispersion of Revolver-Type Anti-Resonant Hollow Core Fibers." Fibers 6, no. 4 (2018): 68. http://dx.doi.org/10.3390/fib6040068.

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Here, we analyze the dispersion behavior of revolver-type anti-resonant hollow core fibers, revealing that the chromatic dispersion of this type of fiber geometry is dominated by the resonances of the glass annuluses, whereas the actual arrangement of the anti-resonant microstructure has a minor impact. Based on these findings, we show that the dispersion behavior of the fundamental core mode can be approximated by that of a tube-type fiber, allowing us to derive analytic expressions for phase index, group-velocity dispersion and zero-dispersion wavelength. The resulting equations and simulati

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39

Xiao, Yueyu, and Jiayao Cheng. "Design of a Nested Hollow-Core Anti-Resonant Fiber Sensor for Simultaneous Measurement of Temperature and Strain." Sensors 24, no. 23 (2024): 7805. https://doi.org/10.3390/s24237805.

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A highly sensitive sensor, which can detect the temperature and strain simultaneously, is proposed using a hollow-core anti-resonant fiber with composite nested tubes. The sensing fiber contains two kinds of nested tubes, and two different sensing mechanisms, the resonance coupling effect and the intermodal interference, are realized in the same section of a hollow-core anti-resonant fiber fully filled with ethanol. Five conjoined nested anti-resonant tubes are introduced to suppress the confinement loss of the higher-order mode LP02. One hybrid conjoined nested tube, which consists of a half-

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Won, Jong Sung, Ha Ram Lee, Min Jun Lee, Min Hong Jeon, Seung Goo Lee, and Yong Lak Joo. "Fabrication of Activated Carbon Fibers with Sheath-Core, Hollow, or Porous Structures via Conjugated Melt Spinning of Polyethylene Precursor." Polymers 12, no. 12 (2020): 2895. http://dx.doi.org/10.3390/polym12122895.

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Using polyethylene as carbon precursor, we have fabricated cost-effective carbon fibers with a sheath-core structure via conjugate melt spinning. Low-density polyethylene (LDPE) and high-density polyethylene (HDPE) were used as the sheath and core of the fiber, respectively, while sulfonation with sulfuric acid was conducted to enable the crosslinking of polyethylene. We demonstrated that carbonization and activation of the sheath-core-structured polyethylene fiber can result in a well-developed microporous structure in the sheath layer, and due to the core-sheath structure, the resulting acti

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Hong, Kyeongmin, Minjae Choe, Seoyeon Kim, Hye-Min Lee, Byung-Joo Kim, and Sungjune Park. "An Ultrastretchable Electrical Switch Fiber with a Magnetic Liquid Metal Core for Remote Magnetic Actuation." Polymers 13, no. 15 (2021): 2407. http://dx.doi.org/10.3390/polym13152407.

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In this work we describe a soft and ultrastretchable fiber with a magnetic liquid metal (MLM) core for electrical switches used in remote magnetic actuation. MLM was prepared by removing the oxide layer on the liquid metal and subsequent mixing with magnetic iron particles. We used SEBS (poly[styrene-b-(ethylene-co-butylene)-b-styrene]) and silicone to prepare stretchable elastic fibers. Once hollow elastic fibers form, MLM was injected into the core of the fiber at ambient pressure. The fibers are soft (Young’s modulus of 1.6~4.4 MPa) and ultrastretchable (elongation at break of 600~5000%) wh

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Schaadt, Jennifer. "Fiber Manufacturing, Membrane Classification, and Winding Technologies Associated with Membrane Oxygenators." Journal of ExtraCorporeal Technology 30, no. 1 (1998): 30–34. http://dx.doi.org/10.1051/ject/199830130.

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Fiber bundling refers to the process of winding hollow polypropylene fibers onto the central core of a membrane oxygenator. Identifying the various bundling techniques serves to facilitate the clinician's understanding of unique device characteristics and the subsequent manufacturing process. This technical information has been voluntarily provided by the product managers and engineers of current membrane manufacturers. Currently the industry employs four primary bundling techiques: single strand, mat configuration, tape and helical. Single strand wraps one fiber at a time, up and down a centr

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Eilzer, Sebastian, and Björn Wedel. "Hollow Core Optical Fibers for Industrial Ultra Short Pulse Laser Beam Delivery Applications." Fibers 6, no. 4 (2018): 80. http://dx.doi.org/10.3390/fib6040080.

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Hollow core fibers were introduced many years ago but are now starting to be used regularly in more demanding applications. While first experiments mainly focused on the characterization and analysis of the fibers themselves, they are now implemented as a tool in the laser beam delivery. Owing to their different designs and implementations, different tasks can be achieved, such as flexible beam delivery, wide spectral broadening up to supercontinuum generation or intense gas-laser interaction over long distances. To achieve a constant result in these applications under varying conditions, many

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Yang, Haiwei, Zongqian Wang, Zhi Liu, Huan Cheng, and Changlong Li. "Continuous, Strong, Porous Silk Firoin-Based Aerogel Fibers toward Textile Thermal Insulation." Polymers 11, no. 11 (2019): 1899. http://dx.doi.org/10.3390/polym11111899.

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Aerogel fiber, with the characteristics of ultra-low density, ultra-high porosity, and high specific surface area, is the most potential candidate for manufacturing wearable thermal insulation material. However, aerogel fibers generally show weak mechanical properties and complex preparation processes. Herein, through firstly preparing a cellulose acetate/polyacrylic acid (CA/PAA) hollow fiber using coaxial wet-spinning followed by injecting the silk fibroin (SF) solution into the hollow fiber, the CA/PAA-wrapped SF aerogel fibers toward textile thermal insulation were successfully constructed

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Wójcik, Grzegorz Michał. "Optimization of silica glass capillary and rods drawing process." Photonics Letters of Poland 11, no. 1 (2019): 19. http://dx.doi.org/10.4302/plp.v11i1.891.

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Diameter fluctuations of silica glass rods and capillaries, during drawing process have been studied. We investigated an influence of drawing conditions on the quality of capillaries and rods. We fabricated two preforms made from different quality material. Fabricated preforms were used to draw microstructured fibers. Full Text: PDF ReferencesS. Habib et al., "Broadband dispersion compensation of conventional single mode fibers using microstructure optical fibers", Int. J. Lig. Opt. 124, 3851-3855 (2013) CrossRef A. Ziolowicz et al. "Overcoming the capacity crunch: ITU-T G.657.B3 compatible 7-

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Pei, Wenxi, Hao Li, Wei Huang, Meng Wang, and Zefeng Wang. "All-Fiber Gas Raman Laser by D2-Filled Hollow-Core Photonic Crystal Fibers." Photonics 8, no. 9 (2021): 382. http://dx.doi.org/10.3390/photonics8090382.

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We report here an all-fiber structure tunable gas Raman laser based on deuterium-filled hollow-core photonic crystal fibers (HC-PCFs). An all-fiber gas cavity is fabricated by fusion splicing a 49 m high-pressure deuterium-filled HC-PCF with two solid-core single-mode fibers at both ends. When pumped with a pulsed fiber amplifier seeded by a tunable laser diode at 1.5 μm, Raman lasers ranging from 1643 nm to 1656 nm are generated. The maximum output power is ~1.2 W with a Raman conversion efficiency of ~45.6% inside the cavity. This work offers an alternative choice for all-fiber lasers operat

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Yang, Xuan, Chao Shi, Rebecca Newhouse, Jin Z. Zhang, and Claire Gu. "Hollow-Core Photonic Crystal Fibers for Surface-Enhanced Raman Scattering Probes." International Journal of Optics 2011 (2011): 1–11. http://dx.doi.org/10.1155/2011/754610.

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Photonic crystal fiber (PCF) sensors based on surface-enhanced Raman scattering (SERS) have become increasingly attractive in chemical and biological detections due to the molecular specificity, high sensitivity, and flexibility. In this paper, we review the development of PCF SERS sensors with emphasis on our recent work on SERS sensors utilizing hollow-core photonic crystal fibers (HCPCFs). Specifically, we discuss and compare various HCPCF SERS sensors, including the liquid-filled HCPCF and liquid-core photonic crystal fibers (LCPCFs). We experimentally demonstrate and theoretically analyze

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Jin, W., H. F. Xuan, and H. L. Ho. "Sensing with hollow-core photonic bandgap fibers." Measurement Science and Technology 21, no. 9 (2010): 094014. http://dx.doi.org/10.1088/0957-0233/21/9/094014.

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Désévédavy, Frédéric, Gilles Renversez, Johann Troles, et al. "Chalcogenide glass hollow core photonic crystal fibers." Optical Materials 32, no. 11 (2010): 1532–39. http://dx.doi.org/10.1016/j.optmat.2010.06.016.

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Konorov, S. O., A. B. Fedotov, L. A. Mel'nikov, A. V. Shcherbakov, and A. M. Zheltikov. "Large-core-area hollow photonic-crystal fibers." Laser Physics Letters 1, no. 11 (2004): 548–50. http://dx.doi.org/10.1002/lapl.200410123.

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