Relevant bibliographies by topics / Hollow core fiber

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Hollow core fiber'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 June 2025

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Journal articles on the topic "Hollow core fiber"

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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-index contrast available in the silica/air microstructures, and partly due to the possibility of making complex refractive-index structure over the fiber cross section. In this paper the fundamental physical mechanism has been discussed determining the dispersion properties of PCFs, and the dispersion in a gas filled hollow core photonic crystal fiber has been calculated. We calculate the dispersion of air filled hollow core photonic crystal fiber, also calculate the dispersion of N2 gas filled hollow core photonic crystal fiber and finally we calculate the dispersion of He gas filled hollow core photonic crystal fiber.
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Barillé, R., P. Tajalli, P. Roy, S. Ahmadi-kandjani, S. Kucharski, and E. Ortyl. "Hollow-core grating fiber." Optics Communications 285, no. 4 (2012): 468–72. http://dx.doi.org/10.1016/j.optcom.2011.10.009.

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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 gas sensors via hollow core anti-resonant fibers. This review gives a detailed and deep understanding of HC-PCF gas sensors and will promote more practical applications of HC-PCFs in the near future.
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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 2.4 GHz, the average generated power was below 20 W. The obtained luminescence spectra of argon plasma in the fiber core showed that the argon luminescence in our experiments was observed only in the form of radiation from neutral atoms. The results obtained show that the microwave slot antenna is a promising pumping scheme for gas-discharge fiber lasers based on hollow-core fibers.
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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 and photocatalytic activity after repeated use. Therefore, the composite fiber has a wide application prospect in photocatalytic degradation of organic pollutants.
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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-core optical fibers fabrication the theoretically. Keywords:hollow-corephotonic band-gap fiber (HC-PBF),finite element method (FEM), surface mode loss, core transversal radius, core intersected method
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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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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 solution for the purpose of propagation of polarized signals. The design of an optimized DHC-ARF with asymmetrical cores is proposed, together with analysis of its essential coupling parameters, such as the extinction ratio, coupling length ratio, and coupling strength. The latter two for the x- and y-polarized signals were ~2 and 1, respectively, while the optical losses were below 0.3 dB/cm in the 1500–1700 nm transmission band.
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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 of cold atoms from free space trapping potential to optical potential inside a hollow-core fiber and calculate the temperature, loading efficiency, and geometry of the ensemble. We also study the noise sources that cause heating and a loss of atoms during the process. Our result could be used to design and optimize the loading process of cold atoms into a hollow-core fiber for cold atom experiments.
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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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Dissertations / Theses on the topic "Hollow core fiber"

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Chu, Yiwen. "Loading rubidium atoms into a hollow core fiber." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40904.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2007.<br>Includes bibliographical references (p. 71-73).<br>We demonstrate a procedure for cooling, trapping, and transferring rubidium atoms into a hollow core photonic band gap fiber. The atoms are first collected in a magneto-optical trap (MOT) and then cooled using polarization gradient cooling. Magnetic traps are then used to confine and transfer the atoms toward the face of the fiber. An optical dipole trap formed using laser light propagating through the fiber guide the atoms and confine them away from the fiber walls. We hope to use this system to achieve large optical depths with possible applications to quantum computing.<br>by Yiwen Chu.<br>S.B.
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Cordier, Martin. "Photon-pair generation in hollow-core photonic-crystal fiber." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLT024/document.

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Les sources de paires de photons sont un composant essentiel des technologies émergentes en information quantique. De nombreux travaux ont permis des avancées importantes utilisant des processus non linéaires d'ordre 2 dans les cristaux et les guides d'ondes, et d'ordre 3 dans les fibres. Les limitations viennent dans le premier cas, des pertes et en particulier des pertes de couplage avec les fibres optiques et dans le second cas, du bruit dû à l'effet Raman dont le spectre est très large dans les fibres de silice. Ce projet propose une nouvelle architecture basée sur des fibres à cristal photonique à coeur creux (FCPCC) que l'on peut remplir de liquide ou de gaz non linéaire. Cette configuration permet la génération paramétrique de paires de photons corrélés par mélange à quatre ondes sans l'inconvénient de la diffusion Raman. Cette technologie offre une large gamme de paramètres à explorer en s'appuyant sur les propriétés physiques et linéaires contrôlables des FCPCC et la possibilité de remplissage de ces fibres avec des fluides aux propriétés non-linéaires variées. En effet, par une conception judicieuse de la FCPCC et un choix approprié du liquide ou du gaz, il est possible de (i) contrôler la dispersion et la transmission pour générer des photons corrélés sur une large gamme spectrale avec la condition d'accord de phase la plus favorable, (ii) d'ajuster la taille de coeur de la fibre et/ou sa forme pour augmenter sa non-linéarité ou son efficacité de couplage avec d'autres fibres et (iii) de s'affranchir totalement de l'effet Raman si on utilise par exemple un gaz monoatomique, ou d'obtenir des raies Raman fines, aisément discriminables des raies paramétriques dans le cas d'un liquide<br>Photon pair sources are an essential component of the emerging quantum information technology. Despite ingenious proposals being explored in the recent years based on either second order nonlinear processes in crystals and waveguides or on third order processes in fibers, limitations remain, due to losses and specifically coupling losses in the former case and due to Raman generation in silica, giving rise to a broad spectrum noise in the latter. These limitations have been challenging to lift because of the limited alternative nonlinear materials that fulfil the conditions for the generation of bright and high fidelity photon pairs in integrable photonic structures. In the present project, we develop a new and versatile type of photonic architecture for quantum information applications that offers access to a variety of nonlinear optical materials that are micro-structured in optical fiber forms to generate photon pairs, without the drawback of Raman scattering and with a large design parameter-space. Indeed, with a careful design of the HCPCF along with the appropriate choice of fluid, one can (i) control the dispersion and the transmission to generate photons with the most favourable phase-matching condition over a large spectral range, (ii) adjust the fibre core size and/or shape to enhance nonlinearity or the coupling efficiency with other fibres, (iii) totally suppress the Raman effect in monoatomic gases for instance or have only narrow and separated Raman lines that can thus be easily separated from the useful parametric lines in liquids
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Tipparaju, Venkata Satya Sai Sarma. "An active core fiber optic gas sensor using a photonic crystal hollow core fiber as a transducer." Master's thesis, Mississippi State : Mississippi State University, 2007. http://sun.library.msstate.edu/ETD-db/theses/available/etd-06262007-164352/.

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Wu, Chunbai 1980. "Raman optical frequency comb generation in hydrogen-filled hollow-core fiber." Thesis, University of Oregon, 2010. http://hdl.handle.net/1794/11052.

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xiv, 138 p. : ill. (some col.)<br>In this dissertation, we demonstrate the generation of optical Raman frequency combs by a single laser pump pulse traveling in hydrogen-filled hollow-core optical fibers. This comb generation process is a cascaded stimulated Raman scattering effect, where higher-order sidebands are produced by lower orders scattered from hydrogen molecules. We observe more than 4 vibrational and 20 rotational Raman sidebands in the comb. They span more than three octaves in optical wavelength, largely thanks to the broadband transmission property of the fiber. We found that there are phase correlations between the generated Raman comb sidebands (spectral lines), although their phases are fluctuating from one pump pulse to another due to the inherit spontaneous initiation of Raman scattering. In the experiment, we generated two Raman combs independently from two fibers and simultaneously observed the single-shot interferences between Stokes and anti-Stokes components from the two fibers. The experimental results clearly showed the strong phase anti-correlation between first-order side bands. We also developed a quantum theory to describe this Raman comb generation process, and it predicts and explains the phase correlations we observe. The phase correlation that we found in optical Raman combs may allow us to synthesize single-cycle optical pulse trains, creating attosecond pulses. However, the vacuum fluctuation in stimulated Raman scattering will result in the fluctuation of carrier envelope phase of the pulse trains. We propose that we can stabilize the comb by simultaneously injecting an auxiliary optical beam, mutually coherent with the main Raman pump laser pulse, which is resonant with the third anti-Stokes field.<br>Committee in Charge: Dr. Steven van Enk, Chair; Dr. Michael G. Raymer; Dr. Daniel A. Steck; Dr. David M. Strom; Dr. Andrew H. Marcus
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Xu, Mengrong. "Advances in hollow core fibres and application to mid-infrared fibre gas lasers." Thesis, University of Bath, 2018. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760959.

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Anti-resonant hollow core fibre is a new kind of optical fibre waveguide in which light is trapped in a hollow core surrounded by the capillary formed microstructured cladding. This fibre exhibits high damage threshold, low dispersion and ultra-low nonlinearity with relatively low loss of a few tens of dB/km. Its intrinsic feature of multimode delivery limits the applications with high requirements of single mode transmission. In my thesis, I demonstrate how the design of hollow core fibre can be improved with single mode guidance. S2 imaging measurement was used to analyse the mode content of the solid core fibres. In my research, I established S2 measurement to measure the mode contents in hollow core fibres for the first time. Two hollow core fibres with 8 capillaries and 7 capillaries in their claddings were fabricated in same fashion and showed differences in low attenuations. By comparing the mode contents in both of the fibres via S2 imaging measurement, 7-capillary HCF was demonstrated to give better performance on single mode guidance. Among the applications of the HCF, the property of delivering high power in HCF makes the gas filled HCF laser possible. In my research, a continuous-wave mid-infrared acetylene filled hollow core laser was built with a slope efficiency of 33% and an output power of over 1 watt at the wavelength region of 3.1~3.2 μm. The pump source is an Erbium-doped fibre amplified tunable laser diode which works at C-band wavelength. The fibre without the gain medium has two transmission bands with low attenuation of 0.037 dB/m and 0.063 dB/m at pumping and lasing wavelengths respectively. This laser system works in either cavity-based configuration or single pass ASE configuration. The latter configuration shows a better performance in high output power and high slope efficiency. The optimized laser system was studied experimentally with the proper fibre length and gas pressure. This laser system could be extended to be filled with other molecules to longer wavelengths and has potential for high power output.
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Wu, Shun. "Direct fiber laser frequency comb stabilization via single tooth saturated absorption spectroscopy in hollow-core fiber." Diss., Kansas State University, 2014. http://hdl.handle.net/2097/18373.

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Doctor of Philosophy<br>Department of Physics<br>Kristan L. Corwin<br>Portable frequency references are crucial for many practical on-site applications, for example, the Global Position System (GPS) navigation, optical communications, and remote sensing. Fiber laser optical frequency combs are a strong candidate for portable reference systems. However, the conventional way of locking the comb repetition rate, frep, to an RF reference leads to large multiplied RF instabilities in the optical frequency domain. By stabilizing a comb directly to an optical reference, the comb stability can potentially be enhanced by four orders of magnitude. The main goal of this thesis is to develop techniques for directly referencing optical frequency combs to optical references toward an all-fiber geometry. A big challenge for direct fiber comb spectroscopy is the low comb power. With an 89 MHz fiber ring laser, we are able to optically amplify a single comb tooth from nW to mW (by a factor of 10^6) by building multiple filtering and amplification stages, while preserving the comb signal-to-noise ratio. This amplified comb tooth is directly stabilized to an optical transition of acetylene at ~ 1539.4 nm via a saturated absorption technique, while the carrier-envelope offset frequency, f0, is locked to an RF reference. The comb stability is studied by comparing to a single wavelength (or CW) reference at 1532.8 nm. Our result shows a short term instability of 6 x10^(-12) at 100 ms gate time, which is over an order of magnitude better than that of a GPS-disciplined Rb clock. This implies that our optically-referenced comb is a suitable candidate for a high precision portable reference. In addition, the direct comb spectroscopy technique we have developed opens many new possibilities in precision spectroscopy for low power, low repetition rate fiber lasers. For single tooth isolation, a novel cross-VIPA (cross-virtually imaged phase array) spectrometer is proposed, with a high spectral resolution of 730 MHz based on our simulations. In addition, the noise dynamics for a free space Cr:forsterite-laser-based frequency comb are explored, to explain the significant f0 linewidth narrowing with knife insertion into the intracavity beam. A theoretical model is used to interpret this f0 narrowing phenomenon, but some unanswered questions still remain.
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Wang, Chenchen. "Optical frequency references in acetylene-filled hollow-core optical fiber and photonic microcells." Diss., Kansas State University, 2015. http://hdl.handle.net/2097/18831.

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Doctor of Philosophy<br>Department of Physics<br>Kristan L. Corwin<br>Optical frequency references have been widely used in applications such as navigation, remote sensing, and telecommunication industry. For stable frequency references in the near-infrared (NIR), lasers can be locked to narrow absorption features in gases such as acetylene. Currently, most Near NIR references are realized in free space setups. In this thesis, a low-loss hollow-core optical fiber with a diameter of sub millimeters is integrated into the reference setup to provide long interaction lengths between the filling gas and the laser field, also facilitate the optical interaction with low power levels. To make portable NIR reference, gas can be sealed inside the hollow-core fiber, by creating a photonic microcell. This work has demonstrated all-fiber optical frequency references in the Near IR by fabricating and integrating gas sealed photonic microcells in the reference setup. Also, a thoughtful study regarding the lineshape of the fiber-based reference has been accomplished. According the proper modeling of a shift due to lineshape, a correction was applied to our previous absolute frequency measurement of an NIR optical frequency reference. Furthermore, effects of the hollow-core fibers, including mode-dependence frequency shift related to surface modes are explored. In addition, angle splicing techniques, which will improve the performance of the fiber-based frequency reference have been created. Low transmission and return loss angle splices of photonic bandgap fiber, single mode PCF, and large core kagome to SMF-28 are developed and those fibers are demonstrated to be promising for photonic microcell based optical frequency references. Finally, a potentially portable optical metrology system is demonstrated by stabilizing a fiber-laser based frequency comb to an acetylene-filled optical fiber frequency reference. Further work is necessary to fabricate an all-fiber portable optical metrology system with high optical transmission and low molecular contamination.
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Jones, Andrew Michael. "Realizing a mid-infrared optically pumped molecular gas laser inside hollow-core photonic crystal fiber." Diss., Kansas State University, 2012. http://hdl.handle.net/2097/13775.

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Doctor of Philosophy<br>Department of Physics<br>Kristan L. Corwin<br>This research has focused on the development, demonstration, and characterization of a new type of laser based on optically-pumped gases contained within hollow optical fibers. These novel lasers are appealing for a variety of applications including frequency metrology in the mid-infrared, free-space communications and imaging, and defense applications. Furthermore, because of the hollow core fibers used, this technology may provide the means to surpass the theoretical limits of output power available from high power solid-core fiber laser systems. Gas-filled hollow-core fiber lasers based on population inversion from acetylene ([superscript]12C[subscript]2H[subscript]2) and hydrogen cyanide (HCN) gas contained within the core of a kagome-structured hollow-core photonic crystal fiber have now been demonstrated. The gases are optically pumped via first order rotational-vibrational overtones near 1.5 μm using 1-ns duration pulses from a home-built optical parametric amplifier. Narrow-band laser emission peaks in the 3-μm region corresponding to the ΔJ = ±1 dipole allowed rotational transitions between the pumped vibrational overtone modes and the fundamental C-H stretching modes have been observed in both molecules. High gain resulting from tight confinement of the pump and laser light together with the active gas permits these lasers to operate in a single pass configuration, without the use of any external resonator structure. Studies of the generated mid-infrared pulse energy, threshold energy, and slope efficiency as functions of the launched pump pulse energy and gas pressure have been performed and show an optimum condition where the maximum laser pulse energy is achieved for a given fiber length. The laser pulse shape and the laser-to-pump pulse delay have been observed to change with varying pump pulse energy and gas pressure, resulting from the necessary population inversion being created in the gases at a specific fiber length dependent on the launched pulse energy. Work is on going to demonstrate the first continuous wave version of the laser which may be used to produce a single coherent output from many mutually incoherent pump sources.
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Dadashzadeh, Neda. "Improved performance of an optically pumped mid-infrared acetylene-filled hollow-core fiber laser." Diss., Kansas State University, 2017. http://hdl.handle.net/2097/36259.

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Doctor of Philosophy<br>Department of Physics<br>Kristan L. Corwin<br>The focus of this research is improving the pulse output energy of a mid-IR pulsed acetylene-filled Hollow-core Optical Fiber Gas LASer (HOFGLAS) system. Pump pulses and acetylene molecules interact with each other inside hollow-core photonic crystal fiber that effectively confines light and allows for strong gain. This results in lasing at 3.11 μm and 3.17 μm lines based on population inversion of acetylene molecules, which are optically pumped at rotational-vibrational overtones near 1.5 μm using 1 ns pulse duration from an optical parametric amplifier (OPA). This acetylene laser operates with no cavity mirrors because of a high gain in a single pass configuration. There are few laser sources in the mid-IR region while there are many applications for having a laser source in this range such as remote sensing, hazardous chemical detection, and breath analysis. This adds to the importance of the acetylene-filled HOFGLAS system. Some of the applications like remote sensing require high power. So, we moved toward power scaling this laser system by optimizing the laser operation through maximizing the OPA alignment to improve its modal content using longer length of fiber to increase the interaction length and improving the beam quality of the mid-IR emissions. The highest pulse energy ever obtained in the 3 µm mid-IR region from the acetylene-filled HOFGLAS after applying the improvements is reported here (1.4 μJ). Higher mid-IR pulse energies can be achieved by improving the pulse energy achievable from the OPA pump source and working with longer pulse duration to decrease the bandwidth of the OPA. This operation demonstrates many novel properties of acetylene-filled pulsed mid-IR hollow-core fiber lasers. The excellent spatial beam quality at highest power and phenomenological scaling of saturation power and efficiency with pressure that we observe point to the promise of power scaling and motivate further development of numerical models of the laser for deeper insight into these effects. M² measurement method was used to examine spatial beam quality and it was found to be fiber-dependent. For the improved setup, M² was investigated at several input pump powers in addition to the reproducibility checks. M² of 1.14 at the maximum output power motivates for beam combining to scale to higher power. The independence of efficiency on pressure is an evidence for reaching higher mid-IR power at a pressure where saturation behavior does not exist. achieving the highest mid-IR power to date, 1.4 μJ, encourages for building higher power OPA to produce high power mid-IR emissions. Taken as a whole, this laser exhibits novel behavior that motivates both numerical/theoretical investigation and further efforts to scale to higher powers.
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O'Neill, Kevin. "FEASIBILITY STUDY OF LIGHTWEIGHT HIGH-STRENGTH HOLLOW CORE BALSA-FRP COMPOSITE BEAMS UNDER FLEXURE." Master's thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3109.

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The United States of America s Military, more specifically the Army, has since the late 1990 s had a vested interest in the development of super-lightweight, portable, short-span composite bridge and decking components to replace aging heavy metal-alloy machine driven modular systems. The following study looks at the feasibility of using balsa wood as the structural core material in fiber reinforced polymer (FRP) wrapped hollow-core composites in short-span bridge applications. The balsa provides shear resistance and the FRP the flexural resistance, resulting in extremely high strength-to-weight and strength-to-depth ratios. Several scaled short span specimens were constructed and tested using a variety of fibers and resins. In addition, a calibrated finite element model (FEM) was developed using data acquired through testing. Of the 3 FRP-matrices tested (carbon-polyurethane, glass-polyurethane, and carbon-epoxy-resin), the carbon-epoxy-resin had the stiffest cross-section and highest ultimate load achieved, although the fiber did not have the highest elastic modulus and ultimate rupture strength of the constituent materials. The carbon-polyurethane fiber had the largest elastic modulus and ultimate strength, but due to construction difficulties did not perform as well as expected. The glass-polyurethane fiber had the lowest elastic modulus and ultimate load with high strain values and performed accordingly during specimen testing. Given the constraints of self-weight, section geometry, and deflection set forth for lightweight short-span portable bridging solutions, this study demonstrates that the balsa-FRP composite systems are viable solutions; in particular, when carbon fabric is paired with balsa cores.<br>M.S.C.E.<br>Department of Civil and Environmental Engineering<br>Engineering and Computer Science<br>Civil Engineering MS
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Books on the topic "Hollow core fiber"

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Love, Adrian. Hollow Core Optical Fibre Based Gas Discharge Laser Systems. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-93970-4.

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Hollow core optical fibers. MDPI, 2019. http://dx.doi.org/10.3390/books978-3-03921-089-3.

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Schmidt, Markus A., and Jürgen Popp. Hollow Core Fibers: New Developments and Key Applications. Wiley & Sons, Incorporated, John, 2023.

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Hollow Core Photonic Crystals Fibers: Fundamental and Applications. Chapman & Hall/CRC, 2009.

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Schmidt, Markus A., and Jürgen Popp. Hollow Core Fibers: New Developments and Key Applications. Wiley & Sons, Limited, John, 2023.

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Love, Adrian. Hollow Core Optical Fibre Based Gas Discharge Laser Systems. Springer, 2018.

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Love, Adrian. Hollow Core Optical Fibre Based Gas Discharge Laser Systems. Springer, 2019.

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Digiovanni, David J. High-Birefringence Hollow-core Fibers and Techniques for Making Same: United States Patent 9971087. Independently Published, 2020.

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Book chapters on the topic "Hollow core fiber"

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Abu Hassan, Muhammad Rosdi. "Fabrication of Negative Curvature Hollow Core Fiber." In Handbook of Optical Fibers. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-10-1477-2_75-1.

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Abu Hassan, Muhammad Rosdi. "Fabrication of Negative Curvature Hollow Core Fiber." In Handbook of Optical Fibers. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-10-7087-7_75.

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Cuenca, Estefanía. "Experimental Tests on Hollow Core Slabs Made with FRC." In On Shear Behavior of Structural Elements Made of Steel Fiber Reinforced Concrete. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-13686-8_7.

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Franklin, K. Ben, R. Kumar, and C. Nayak. "A Hollow Core Bragg Fiber with Multilayered Random Defect for Refractive Index Sensing." In Lecture Notes in Networks and Systems. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-0146-3_36.

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Biswas, Tushar, Subir Majumder, Mrinmay Pal, and Shyamal K. Bhadra. "Design and Development of Plasmonic Hollow Core Photonic Crystal Fiber for Sensing Applications." In Springer Proceedings in Physics. Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-2367-2_8.

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Choudhary, Kajal, Pankaj Verma, and Amit Kumar. "Refractive Index-based Ethanol Sensor using Hollow Core Photonic Crystal Fiber in THz region." In Proceedings of First International Conference on Computational Electronics for Wireless Communications. Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6246-1_57.

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Gallmann, Lukas, Thomas Pfeifer, Mark J. Abel, Phillip M. Nagel, Daniel M. Neumark, and Stephen R. Leone. "Direct Comparison of the Hollow-core Fiber and Filamentation Techniques for Few-cycle Pulse Generation." In Ultrafast Phenomena XV. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-68781-8_30.

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Fang, Shaobo, Hong Ye, Giovanni Cirmi, et al. "Above-Millijoule Optical Waveforms Compressible to Sub-fs Using Induced-Phase Modulation in a Neon-Filled Hollow-Core Fiber." In Springer Proceedings in Physics. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13242-6_193.

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Garzella, D., P. Breger, P. Agostini, et al. "Kilohertz High Harmonic Generation in Hollow Core Fibers." In Springer Series in Chemical Physics. Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-642-72289-9_116.

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F. Saleh, Mohammed, and Fabio Biancalana. "Novel Nonlinear Optical Phenomena in Gas-Filled Hollow-Core Photonic Crystal Fibers." In Shaping Light in Nonlinear Optical Fibers. John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781119088134.ch3.

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Conference papers on the topic "Hollow core fiber"

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Lyu, Zhouping, and Lyubov V. Amitonova. "Hollow-core fiber imaging." In Specialty Optical Fibers. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/sof.2022.sotu4i.4.

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Multimode fibers serve as high-resolution imaging probes. We show that a hollow-core fiber solves the problems of high background and limited NA. We experimentally demonstrate high-NA raster-scan and compressive imaging through a hollow-core multimode fiber.
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Nagase, Ryo, Hideki Kamitsuna, Ren Sasaki, and Toshiki Maejima. "Hollow-Core Fiber Connector." In Optoelectronics and Communications Conference. OSA, 2021. http://dx.doi.org/10.1364/oecc.2021.s4e.3.

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Goel, Charu, Jichao Zang, Muhammad Abu Bin Rosdi, Wonkeun Chang, and Seongwoo Yoo. "Hollow-Core Fiber Based Inline Polarizer." In CLEO: Science and Innovations. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_si.2022.sw4k.5.

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We experimentally demonstrate the first compact antiresonant hollow-core fiber based inline polarizer. The device offers &gt;25 dB polarization extinction ratio and &lt;1.5 dB insertion loss when fusion spliced to mode-matched solid and hollow-core fibers.
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Suslov, Dmytro, Thomas William Kelly, Shuichiro Rikimi, et al. "Towards Compact Hollow-Core Fiber Gas Cells." In CLEO: Science and Innovations. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_si.2022.sw4k.2.

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We demonstrate a 3-way interconnection device (hollow-core fiber, standard single-mode fiber and gas inlet) that is compact, low-loss, and easy-to-use. We demonstrate its performance on fibre purging, observing water vapor via infrared spectroscopy.
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Knight, Jonathan C. "Anti-Resonant Hollow Core Fibers." In Optical Fiber Communication Conference. OSA, 2019. http://dx.doi.org/10.1364/ofc.2019.th3e.4.

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Wadsworth, William J., Adrian L. Love, and Jonathan C. Knight. "Hollow-core Fiber Gas Lasers." In Workshop on Specialty Optical Fibers and their Applications. OSA, 2015. http://dx.doi.org/10.1364/wsof.2015.wt1a.1.

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Richardson, D. J., N. V. Wheeler, Y. Chen, et al. "Hollow Core Fibres and their Applications." In Optical Fiber Communication Conference. OSA, 2017. http://dx.doi.org/10.1364/ofc.2017.tu3h.1.

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Gladyshev, A. V., A. F. Kosolapov, M. S. Astapovich, et al. "Revolver Hollow-Core Fibers and Raman Fiber Lasers." In Optical Fiber Communication Conference. OSA, 2018. http://dx.doi.org/10.1364/ofc.2018.m2j.7.

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Bufetov, Igor, Anton Kolyadin, and Alexey Kosolapov. "Fiber Fuse Effect in Hollow Core Optical Fibers." In 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE, 2019. http://dx.doi.org/10.1109/cleoe-eqec.2019.8873127.

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Jasion, Gregory T., Thomas D. Bradley, Kerrianne Harrington, et al. "Recent Breakthroughs in Hollow Core Fiber Technology." In Optical Fiber Communication Conference. OSA, 2021. http://dx.doi.org/10.1364/ofc.2021.m5e.2.

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Reports on the topic "Hollow core fiber"

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Corwin, Kristan L., Brian R. Washburn, Wolfgang Rudolph, Vasudevan Nampoothiri, and Fetah Benabid. Gas-Filled Hollow Core Fiber Lasers Based on Population Inversion. Defense Technical Information Center, 2013. http://dx.doi.org/10.21236/ada593591.

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