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L. Vincetti
Department of Engineering “Enzo Ferrari”, University of Modena and Reggio Emilia, Modena, 41125, Italy

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Journal article
Published: 06 January 2021 in Light: Science & Applications
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Remarkable recent demonstrations of ultra-low-loss inhibited-coupling (IC) hollow-core photonic-crystal fibres (HCPCFs) established them as serious candidates for next-generation long-haul fibre optics systems. A hindrance to this prospect and also to short-haul applications such as micromachining, where stable and high-quality beam delivery is needed, is the difficulty in designing and fabricating an IC-guiding fibre that combines ultra-low loss, truly robust single-modeness, and polarisation-maintaining operation. The design solutions proposed to date require a trade-off between low loss and truly single-modeness. Here, we propose a novel IC-HCPCF for achieving low-loss and effective single-mode operation. The fibre is endowed with a hybrid cladding composed of a Kagome-tubular lattice (HKT). This new concept of a microstructured cladding allows us to significantly reduce the confinement loss and, at the same time, preserve truly robust single-mode operation. Experimental results show an HKT-IC-HCPCF with a minimum loss of 1.6 dB/km at 1050 nm and a higher-order mode extinction ratio as high as 47.0 dB for a 10 m long fibre. The robustness of the fibre single-modeness is tested by moving the fibre and varying the coupling conditions. The design proposed herein opens a new route for the development of HCPCFs that combine robust ultra-low-loss transmission and single-mode beam delivery and provides new insight into IC guidance.

ACS Style

Foued Amrani; Jonas H. Osório; Frédéric Delahaye; Fabio Giovanardi; Luca Vincetti; Benoît Debord; Frédéric Gérôme; Fetah Benabid. Low-loss single-mode hybrid-lattice hollow-core photonic-crystal fibre. Light: Science & Applications 2021, 10, 1 -12.

AMA Style

Foued Amrani, Jonas H. Osório, Frédéric Delahaye, Fabio Giovanardi, Luca Vincetti, Benoît Debord, Frédéric Gérôme, Fetah Benabid. Low-loss single-mode hybrid-lattice hollow-core photonic-crystal fibre. Light: Science & Applications. 2021; 10 (1):1-12.

Chicago/Turabian Style

Foued Amrani; Jonas H. Osório; Frédéric Delahaye; Fabio Giovanardi; Luca Vincetti; Benoît Debord; Frédéric Gérôme; Fetah Benabid. 2021. "Low-loss single-mode hybrid-lattice hollow-core photonic-crystal fibre." Light: Science & Applications 10, no. 1: 1-12.

Research article
Published: 12 June 2020 in Microwave and Optical Technology Letters
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A low cost and low‐profile multiband 3D antenna for roof‐top vehicular applications is presented. The radiating element is obtained through a folded metal sheet shaping a geometry that makes the antenna works in the LTE (Long‐Term Evolution) bands. Thanks to its particular shape and its small size the antenna can be positioned under the automotive common used shark‐fin case. Furthermore, the design allows an easy industrialization process, using low cost material. In fact, the designed shape needs only to be cut and folded without any welding process. In addition to the designed antenna, simulations and measurements take into account another radiating element in order to analyze its behavior in a MIMO (Multiple‐Input‐Multiple‐Output) configuration. For the proposed solution good performances have been demonstrated from both numerical and measurements results.

ACS Style

Federico Melli; Stefano Lenzini; Matteo Cerretelli; Enrico Coscelli; Andrea Notari; Luca Vincetti. Low cost 3D tin sheet multiband shark‐fin antenna for LTE MIMO vehicular application. Microwave and Optical Technology Letters 2020, 62, 3876 -3880.

AMA Style

Federico Melli, Stefano Lenzini, Matteo Cerretelli, Enrico Coscelli, Andrea Notari, Luca Vincetti. Low cost 3D tin sheet multiband shark‐fin antenna for LTE MIMO vehicular application. Microwave and Optical Technology Letters. 2020; 62 (12):3876-3880.

Chicago/Turabian Style

Federico Melli; Stefano Lenzini; Matteo Cerretelli; Enrico Coscelli; Andrea Notari; Luca Vincetti. 2020. "Low cost 3D tin sheet multiband shark‐fin antenna for LTE MIMO vehicular application." Microwave and Optical Technology Letters 62, no. 12: 3876-3880.

Journal article
Published: 31 October 2019 in Communications Physics
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Unravelling superradiance, also known as superfluorescence, relies on an ensemble of phase-matched dipole oscillators and the suppression of inhomogeneous broadening. Here we report a superradiance platform that combines an optical lattice free from the ac Stark shift and a hollow-core photonic crystal fibre, enabling an extended atom-light interaction over 2 mm free from the Doppler effect. This system allows control of the atom spatial distribution and spectral homogeneity whilst efficiently coupling the radiation field to an optical fibre. The experimentally-observed and theoretically-corroborated temporal, spectral and spatial dynamic behaviours of the superradiance, e.g., superradiance ringing and density-dependent frequency shift, demonstrate a unique interplay between the trapped atoms and the fibre-guided field with multiple transverse modes. Our theory indicates that the resulting temporal evolution of the guided light shows a minimal beam radius of 3.1 µm which is three times smaller than that of the lowest-loss fibre mode.

ACS Style

Shoichi Okaba; Deshui Yu; Luca Vincetti; Fetah Benabid; Hidetoshi Katori. Superradiance from lattice-confined atoms inside hollow core fibre. Communications Physics 2019, 2, 1 .

AMA Style

Shoichi Okaba, Deshui Yu, Luca Vincetti, Fetah Benabid, Hidetoshi Katori. Superradiance from lattice-confined atoms inside hollow core fibre. Communications Physics. 2019; 2 (1):1.

Chicago/Turabian Style

Shoichi Okaba; Deshui Yu; Luca Vincetti; Fetah Benabid; Hidetoshi Katori. 2019. "Superradiance from lattice-confined atoms inside hollow core fibre." Communications Physics 2, no. 1: 1.

Proceedings article
Published: 07 March 2019 in Fiber Lasers XVI: Technology and Systems
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Multi-core fiber capability to deliver several independent beams in a single structure has been deeply investigated to obtain spatial multiplexing in optical communication. Recently, the coherent beam multiplexing idea has been extended to high power fiber laser field, where multi-core fiber amplifiers, combining low power beams, promise to overcome thermal mode instability, which characterizes single-core fiber amplifiers. Although coherent output beam combination is advantaged in multi-core fiber, the understanding of core phase shifts is necessary to implement efficient beam combination. In presence of thermal load, induced by pump-to-signal conversion quantum defect, a refractive index gradient is formed on the multi-core fiber amplifier cross-section, thus changing core propagation properties and possibly creating unwanted core couplings. In this work a 9-core double-cladding fiber amplifier is numerically investigated by varying the core thermal load, from 2 to 15 W/m, in order to understand the structure propagation mismatch. The 9 cores are organized in a 3×3 regular grid, each core has a diameter of 19 μm and a spacing of 55 μm. Cores numerical aperture is 0.06. The outer cladding has a diameter of 340 μm. A comparison between a rod-type fiber amplifier configuration and a flexible fiber amplifier has been performed. Results show that the cores can be divided in three groups according to their propagation properties: central core, side cores, and corner ones. The phase shift between these groups, or equivalently the effective index difference, becomes higher with the increase of thermal load. These observations are fundamental to implement a model for beam propagation in presence of thermal effect, to investigate the amplification dynamics along z-direction.

ACS Style

Carlo Molardi; Shahul H. Pallangal; Lorenzo Rosa; Luca Vincetti; Federica Poli; Stefano Selleri; Annamaria Cucinotta. Guidance properties and phase shift of a 9-core fiber amplifier for high power operation in presence of consistent thermal load. Fiber Lasers XVI: Technology and Systems 2019, 10897, 1089706 .

AMA Style

Carlo Molardi, Shahul H. Pallangal, Lorenzo Rosa, Luca Vincetti, Federica Poli, Stefano Selleri, Annamaria Cucinotta. Guidance properties and phase shift of a 9-core fiber amplifier for high power operation in presence of consistent thermal load. Fiber Lasers XVI: Technology and Systems. 2019; 10897 ():1089706.

Chicago/Turabian Style

Carlo Molardi; Shahul H. Pallangal; Lorenzo Rosa; Luca Vincetti; Federica Poli; Stefano Selleri; Annamaria Cucinotta. 2019. "Guidance properties and phase shift of a 9-core fiber amplifier for high power operation in presence of consistent thermal load." Fiber Lasers XVI: Technology and Systems 10897, no. : 1089706.

Review
Published: 18 February 2019 in Fibers
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Since their inception, about 20 years ago, hollow-core photonic crystal fiber and its gas-filled form are now establishing themselves both as a platform in advancing our knowledge on how light is confined and guided in microstructured dielectric optical waveguides, and a remarkable enabler in a large and diverse range of fields. The latter spans from nonlinear and coherent optics, atom optics and laser metrology, quantum information to high optical field physics and plasma physics. Here, we give a historical account of the major seminal works, we review the physics principles underlying the different optical guidance mechanisms that have emerged and how they have been used as design tools to set the current state-of-the-art in the transmission performance of such fibers. In a second part of this review, we give a nonexhaustive, yet representative, list of the different applications where gas-filled hollow-core photonic crystal fiber played a transformative role, and how the achieved results are leading to the emergence of a new field, which could be coined “Gas photonics”. We particularly stress on the synergetic interplay between glass, gas, and light in founding this new fiber science and technology.

ACS Style

Benoît Debord; Foued Amrani; Luca Vincetti; Frédéric Gérôme; Fetah Benabid. Hollow-Core Fiber Technology: The Rising of “Gas Photonics”. Fibers 2019, 7, 16 .

AMA Style

Benoît Debord, Foued Amrani, Luca Vincetti, Frédéric Gérôme, Fetah Benabid. Hollow-Core Fiber Technology: The Rising of “Gas Photonics”. Fibers. 2019; 7 (2):16.

Chicago/Turabian Style

Benoît Debord; Foued Amrani; Luca Vincetti; Frédéric Gérôme; Fetah Benabid. 2019. "Hollow-Core Fiber Technology: The Rising of “Gas Photonics”." Fibers 7, no. 2: 16.

Journal article
Published: 12 February 2019 in Optics Express
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In this work, we propose an analytical model for estimating confinement loss in Tube Lattice Fibers. It is based on the single-tube model and the inhibited coupling waveguiding mechanism. The comparison with numerical simulations of tube lattice fibers having different geometrical parameters and dielectric refractive indexes demonstrates the model validity and effectiveness. Being based only on analytical closed formulas, it constitutes a useful tool for rapid estimation of TLF CL. It also gives a more in-depth insight into the TLF guiding mechanisms, confirming the inhibited coupling is an appropriate and effective model for such kind of fibers.

ACS Style

Luca Vincetti; Lorenzo Rosa. A simple analytical model for confinement loss estimation in hollow-core Tube Lattice Fibers. Optics Express 2019, 27, 5230 -5237.

AMA Style

Luca Vincetti, Lorenzo Rosa. A simple analytical model for confinement loss estimation in hollow-core Tube Lattice Fibers. Optics Express. 2019; 27 (4):5230-5237.

Chicago/Turabian Style

Luca Vincetti; Lorenzo Rosa. 2019. "A simple analytical model for confinement loss estimation in hollow-core Tube Lattice Fibers." Optics Express 27, no. 4: 5230-5237.

Journal article
Published: 04 February 2019 in Scientific Reports
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Understanding cladding properties is crucial for designing microstructured optical fibers. This is particularly acute for Inhibited-Coupling guiding fibers because of the reliance of their core guidance on the core and cladding mode-field overlap integral. Consequently, careful planning of the fiber cladding parameters allows obtaining fibers with optimized characteristics such as low loss and broad transmission bandwidth. In this manuscript, we report on how one can tailor the modal properties of hollow-core photonic crystal fibers by adequately modifying the fiber cladding. We show that the alteration of the position of the tubular fibers cladding tubes can alter the loss hierarchy of the modes in these fibers, and exhibit salient polarization propriety. In this context, we present two fibers with different cladding structures which favor propagation of higher order core modes – namely LP11 and LP21 modes. Additionally, we provide discussions on mode transformations in these fibers and show that one can obtain uncommon intensity and polarization profiles at the fiber output. This allows the fiber to act as a mode intensity and polarization shaper. We envisage this novel concept can be useful for a variety of applications such as hollow core fiber based atom optics, atom-surface physics, sensing and nonlinear optics.

ACS Style

Jonas H. Osório; Matthieu Chafer; Benoît Debord; Fabio Giovanardi; Martin Cordier; Martin Maurel; Frédéric Delahaye; Foued Amrani; Luca Vincetti; Frédéric Gérôme; Fetah Benabid. Tailoring modal properties of inhibited-coupling guiding fibers by cladding modification. Scientific Reports 2019, 9, 1 -8.

AMA Style

Jonas H. Osório, Matthieu Chafer, Benoît Debord, Fabio Giovanardi, Martin Cordier, Martin Maurel, Frédéric Delahaye, Foued Amrani, Luca Vincetti, Frédéric Gérôme, Fetah Benabid. Tailoring modal properties of inhibited-coupling guiding fibers by cladding modification. Scientific Reports. 2019; 9 (1):1-8.

Chicago/Turabian Style

Jonas H. Osório; Matthieu Chafer; Benoît Debord; Fabio Giovanardi; Martin Cordier; Martin Maurel; Frédéric Delahaye; Foued Amrani; Luca Vincetti; Frédéric Gérôme; Fetah Benabid. 2019. "Tailoring modal properties of inhibited-coupling guiding fibers by cladding modification." Scientific Reports 9, no. 1: 1-8.

Journal article
Published: 11 January 2019 in Optics Letters
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Emission at 4.6 μm was observed from an N2O filled hollow core fiber laser. 8-ns pump pulses at 1.517 μm excited a vibrational overtone resulting in lasing on an R and P branch fundamental transition from the upper pump state. At optimum gas pressure of 80 Torr, photon conversion efficiency of 9% and slope efficiency of 3% were observed from a mirrorless laser. The laser threshold occurred at absorbed pump energy of 150 nJ in a 45-cm long fiber with 85 μm core diameter. The observed dependence of the laser output on gas pressure was shown to be a result of line broadening and relaxation rates.

ACS Style

F. B. A. Aghbolagh; V. Nampoothiri; B. Debord; F. Gerome; Luca Vincetti; F. Benabid; W. Rudolph. Mid IR hollow core fiber gas laser emitting at 46 μm. Optics Letters 2019, 44, 383 -386.

AMA Style

F. B. A. Aghbolagh, V. Nampoothiri, B. Debord, F. Gerome, Luca Vincetti, F. Benabid, W. Rudolph. Mid IR hollow core fiber gas laser emitting at 46 μm. Optics Letters. 2019; 44 (2):383-386.

Chicago/Turabian Style

F. B. A. Aghbolagh; V. Nampoothiri; B. Debord; F. Gerome; Luca Vincetti; F. Benabid; W. Rudolph. 2019. "Mid IR hollow core fiber gas laser emitting at 46 μm." Optics Letters 44, no. 2: 383-386.

Journal article
Published: 10 January 2019 in Journal of Lightwave Technology
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In this work, we report how tube lattice hollow-core fibers can be successfully used to build sensors for molecule detection. The inner silica surface of the fiber is functionalized and coated with a probe layer, which permits to bond only with a particular molecule (the target). When the fiber is infiltrated with a solution containing the target an additional layer is crated on the silica surface causing a redshift of the fiber transmission spectrum. The technique does not require any additional transducer component such as Bragg gratings, amplifying techniques such as nano-particles nor coherent sources. It simply consists of the measurement of the transmission spectrum of a piece of fiber some tens centimeters long. The principle is validated with experimental results showing the detection of streptavidin protein. A solution containing streptavidin was flowed trough the hollow core of the fiber coated with biotine. The measurement of the transmitted spectrum before and after the infiltration showed the presence of a some nanometer thick bio-layer.

ACS Style

Fabio Giovanardi; Annamaria Cucinotta; Andrea Rozzi; Roberto Corradini; Fetah Benabid; Lorenzo Rosa; Luca Vincetti. Hollow Core Inhibited Coupling Fibers for Biological Optical Sensing. Journal of Lightwave Technology 2019, 37, 2598 -2604.

AMA Style

Fabio Giovanardi, Annamaria Cucinotta, Andrea Rozzi, Roberto Corradini, Fetah Benabid, Lorenzo Rosa, Luca Vincetti. Hollow Core Inhibited Coupling Fibers for Biological Optical Sensing. Journal of Lightwave Technology. 2019; 37 (11):2598-2604.

Chicago/Turabian Style

Fabio Giovanardi; Annamaria Cucinotta; Andrea Rozzi; Roberto Corradini; Fetah Benabid; Lorenzo Rosa; Luca Vincetti. 2019. "Hollow Core Inhibited Coupling Fibers for Biological Optical Sensing." Journal of Lightwave Technology 37, no. 11: 2598-2604.

Journal article
Published: 04 September 2018 in Advanced Electromagnetics
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A new methodology to the analysis of the results of Finite-Element Modeling (FEM) simulations at electric field singularities is proposed. The method, that can be easily applied in the post-processing phase of the electromagnetic FEM analysis workflow, is based on the weighted averaging of the calculated electric field magnitude within small volumes including the singularity point under investigation. In the paper, the proposed approach is applied to the electrical stress analysis of a high-voltage device modeled by means of a commercial electromagnetic FEM tool. In comparison to the conventional metric of the maximum field evaluation usually adopted for the analysis of electrical stress in insulators, our approach features several advantages: (i) the outcome of the analysis is independent of the numerical grid refinement at the singularity, thus allowing direct comparison of calculated electric field with the material dielectric strength; (ii) the method is robust against slight modifications of the geometrical shape of the singularity; (iii) on the other hand, for a given shape, the analysis outcome responds to significant variations of the singularity size or, in other words, of its sharpness; (iv) in the analysis of highvoltage devices, the approach can be applied for the estimation of the discharge volumes corresponding to different singularity types of different device geometries. In the paper, the new methodology is explained in details and is applied to simple but significant case studies.

ACS Style

G. Betti Beneventi; M. DalRe; L. Vincetti. A New Approach to the Analysis of Electromagnetic FEM Simulations Results at Electric Field Singularities. Advanced Electromagnetics 2018, 7, 53 -62.

AMA Style

G. Betti Beneventi, M. DalRe, L. Vincetti. A New Approach to the Analysis of Electromagnetic FEM Simulations Results at Electric Field Singularities. Advanced Electromagnetics. 2018; 7 (5):53-62.

Chicago/Turabian Style

G. Betti Beneventi; M. DalRe; L. Vincetti. 2018. "A New Approach to the Analysis of Electromagnetic FEM Simulations Results at Electric Field Singularities." Advanced Electromagnetics 7, no. 5: 53-62.

Preprint
Published: 24 July 2018
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ACS Style

Jonas H. Osorio; Matthieu Chafer; Benoit Debord; Fabio Giovanardi; Martin Cordier; Martin Maurel; Frederic Delahaye; Foued Amrani; Luca Vincetti; Frederic Gerome; Fetah Benabid. Tailoring modal properties of inhibited-coupling guiding fibers by cladding modification. 2018, 1 .

AMA Style

Jonas H. Osorio, Matthieu Chafer, Benoit Debord, Fabio Giovanardi, Martin Cordier, Martin Maurel, Frederic Delahaye, Foued Amrani, Luca Vincetti, Frederic Gerome, Fetah Benabid. Tailoring modal properties of inhibited-coupling guiding fibers by cladding modification. . 2018; ():1.

Chicago/Turabian Style

Jonas H. Osorio; Matthieu Chafer; Benoit Debord; Fabio Giovanardi; Martin Cordier; Martin Maurel; Frederic Delahaye; Foued Amrani; Luca Vincetti; Frederic Gerome; Fetah Benabid. 2018. "Tailoring modal properties of inhibited-coupling guiding fibers by cladding modification." , no. : 1.

Journal article
Published: 29 March 2018 in Optics Letters
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We report on the development of hypocycloid core-contour inhibited-coupling (IC) Kagome hollow-core photonic crystal fibers (HC-PCFs) with record transmission loss and spectral coverage that include the common industrial laser wavelengths. Using the scaling of the confinement loss with the core-contour negative curvature and the silica strut thickness, we fabricated an IC Kagome HC-PCF for Yb and Nd:Yag laser guidance with record loss level of 8.5 dB/km associated with a 225-nm-wide 3-dB bandwidth. A second HC-PCF is fabricated with reduced silica strut thickness while keeping the hypocycloid core contour. It exhibits a fundamental transmission window spanning down to the Ti:Sa spectral range and a loss figure of 30 dB/km at 750 nm. The fibers’ modal properties and bending sensitivity show these HC-PCFs to be ideal for ultralow-loss, flexible, and robust laser beam delivery.

ACS Style

Martin Maurel; Matthieu Chafer; Abhilash Amsanpally; Muhammad Adnan; Foued Amrani; Benoit Debord; Luca Vincetti; Frédéric Gérôme; Fetah Benabid. Optimized inhibited-coupling Kagome fibers at Yb-Nd:Yag (85 dB/km) and Ti:Sa (30 dB/km) ranges. Optics Letters 2018, 43, 1598 -1601.

AMA Style

Martin Maurel, Matthieu Chafer, Abhilash Amsanpally, Muhammad Adnan, Foued Amrani, Benoit Debord, Luca Vincetti, Frédéric Gérôme, Fetah Benabid. Optimized inhibited-coupling Kagome fibers at Yb-Nd:Yag (85 dB/km) and Ti:Sa (30 dB/km) ranges. Optics Letters. 2018; 43 (7):1598-1601.

Chicago/Turabian Style

Martin Maurel; Matthieu Chafer; Abhilash Amsanpally; Muhammad Adnan; Foued Amrani; Benoit Debord; Luca Vincetti; Frédéric Gérôme; Fetah Benabid. 2018. "Optimized inhibited-coupling Kagome fibers at Yb-Nd:Yag (85 dB/km) and Ti:Sa (30 dB/km) ranges." Optics Letters 43, no. 7: 1598-1601.

Conference paper
Published: 01 January 2018 in Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF)
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In this work we report how tubular lattice hollow core fibers can be successfully used as sensors for proteins such as streptavidin. After a functionalization of the silica surface, a layer of biotin was deposited on the fiber core inner surface. The fiber was than infiltrated with a solution containing streptavidin and a red shift of the fiber transmission spectrum was experimentally observed.

ACS Style

F. Giovanardi; A. Cucinotta; A. Rozzi; R. Corradini; F. Benabid; L. Vincetti. Protein Detection Using Hollow-Core Tube Lattice Fibers. Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF) 2018, SeM3E.4 .

AMA Style

F. Giovanardi, A. Cucinotta, A. Rozzi, R. Corradini, F. Benabid, L. Vincetti. Protein Detection Using Hollow-Core Tube Lattice Fibers. Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF). 2018; ():SeM3E.4.

Chicago/Turabian Style

F. Giovanardi; A. Cucinotta; A. Rozzi; R. Corradini; F. Benabid; L. Vincetti. 2018. "Protein Detection Using Hollow-Core Tube Lattice Fibers." Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF) , no. : SeM3E.4.

Conference paper
Published: 01 January 2018 in Advanced Photonics
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We present results on multi-core fibers (MCFs) for optical amplification/lasing obtained by combined thermal-optical finite-element method (FEM) simulations. Refractive index variation due to quantum defect caused heating is simulated to evaluate thermal dissipation-induced index gradients.

ACS Style

L. Rosa; H. McKee; F. Poli; Stefano Selleri; Luca Vincetti; A. Cucinotta. Thermally-Driven Mode Coupling in Multi-Core Optical Fibers. Advanced Photonics 2018, JTu5A.79 .

AMA Style

L. Rosa, H. McKee, F. Poli, Stefano Selleri, Luca Vincetti, A. Cucinotta. Thermally-Driven Mode Coupling in Multi-Core Optical Fibers. Advanced Photonics. 2018; ():JTu5A.79.

Chicago/Turabian Style

L. Rosa; H. McKee; F. Poli; Stefano Selleri; Luca Vincetti; A. Cucinotta. 2018. "Thermally-Driven Mode Coupling in Multi-Core Optical Fibers." Advanced Photonics , no. : JTu5A.79.

Conference paper
Published: 01 January 2018 in Conference on Lasers and Electro-Optics
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We report on mode transformation in an asymmetric tubular hollow fiber. We theoretically and experimentally show that LP01 and LP11 modes superposition entails an output profile with unusual spatially-separated orthogonal polarization sites.

ACS Style

J. H. Osorio; M. Chafer; B. Debord; F. Giovanardi; M. Cordier; F. Delahaye; L. Vincetti; F. Gerome; F. Benabid. Mode transformation in an inhibited-coupling guiding asymmetric tubular hollow fiber. Conference on Lasers and Electro-Optics 2018, SF1K.6 .

AMA Style

J. H. Osorio, M. Chafer, B. Debord, F. Giovanardi, M. Cordier, F. Delahaye, L. Vincetti, F. Gerome, F. Benabid. Mode transformation in an inhibited-coupling guiding asymmetric tubular hollow fiber. Conference on Lasers and Electro-Optics. 2018; ():SF1K.6.

Chicago/Turabian Style

J. H. Osorio; M. Chafer; B. Debord; F. Giovanardi; M. Cordier; F. Delahaye; L. Vincetti; F. Gerome; F. Benabid. 2018. "Mode transformation in an inhibited-coupling guiding asymmetric tubular hollow fiber." Conference on Lasers and Electro-Optics , no. : SF1K.6.

Proceedings article
Published: 01 January 2018 in Advanced Photonics
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In this work, we propose an analytical formula for estimating confinement loss in Tube Lattice Fibers. The formula is based on a single-tube model and the comparison with numerical simulations of three TLFs designed to work in the UV, NIR, and THz spectral ranges shows good agreement.

ACS Style

Lorenzo Rosa; Luca Vincetti. Analytical Estimation of Confinement Loss in Tube Lattice Fibers. Advanced Photonics 2018, JTu5A.65 .

AMA Style

Lorenzo Rosa, Luca Vincetti. Analytical Estimation of Confinement Loss in Tube Lattice Fibers. Advanced Photonics. 2018; ():JTu5A.65.

Chicago/Turabian Style

Lorenzo Rosa; Luca Vincetti. 2018. "Analytical Estimation of Confinement Loss in Tube Lattice Fibers." Advanced Photonics , no. : JTu5A.65.

Journal article
Published: 13 October 2017 in Optics Express
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The potentialities in using hollow core tube lattice fibers based on inhibited coupling wave-guiding for label-free DNA detection are numerically investigated and discussed here. The proposed sensing approach does not require any additional transducer component such as Bragg gratings, amplifying techniques such as nanoparticles nor coherent sources. It simply consists of the measurement of the transmittance of a piece of fiber some ten centimeters long. In case of matching DNA sequence, an additional bio-layer is laid down the dielectric-air interface causing a red shift of the transmission spectrum of the fiber. Results show a spectral sensitivity on the bio-layer with shift as high as 42 nm for every 10 nm of bio-layer and robustness against imperfect fiber coupling. The proposed approach can be easily applied to sensing of other complex molecular structures where the presence/absence of analyte can generate or not an additional layer.

ACS Style

F. Giovanardi; A. Cucinotta; Luca Vincetti. Inhibited coupling guiding hollow fibers for label-free DNA detection. Optics Express 2017, 25, 26215 .

AMA Style

F. Giovanardi, A. Cucinotta, Luca Vincetti. Inhibited coupling guiding hollow fibers for label-free DNA detection. Optics Express. 2017; 25 (21):26215.

Chicago/Turabian Style

F. Giovanardi; A. Cucinotta; Luca Vincetti. 2017. "Inhibited coupling guiding hollow fibers for label-free DNA detection." Optics Express 25, no. 21: 26215.

Conference paper
Published: 01 June 2017 in 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
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Summary form only given. The dramatic progress in power-scaling of ultra-short pulse (USP) lasers and their continuous expansion use in industrial applications call for flexible and robust beam delivery systems (BDS) over several meters. Recently, a new branch of hollow-core photonic crystal fiber (HC-PCF) based on inhibited coupling (IC) mechanism has been proposed and successfully applied to demonstrate the delivery of milliJoule 600 femtosecond pulses in a several meter long piece and in robustly single-mode fashion. Despite this breakthrough, it is desirable to reduce further the attenuation and enlarge the operating bandwidth of such fiber to increase the capability of the BDS whilst keeping the same delivery performances. In this context, a carefully optimization of the geometrical parameters of the core contour (i.e., the curvature b and the silica thickness t) is studied resulting in the fabrication of new state-of-the-art IC Kagome HC-PCF combining losses less than 10 dB/km for the first time and associated to an enlarged transmission bandwidth able to cover all the entire industrial spectral range.

ACS Style

B. Debord; M. Maurel; A. Amsanpally; M. Adnan; A. Gorse; B. Beaudou; J.-M. Blondy; L. Vincetti; F. Gerome; F. Benabid. Experimental optimization of curvature and silica thickness core contour of inhibited-coupling Kagome fibers. 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) 2017, 1 -1.

AMA Style

B. Debord, M. Maurel, A. Amsanpally, M. Adnan, A. Gorse, B. Beaudou, J.-M. Blondy, L. Vincetti, F. Gerome, F. Benabid. Experimental optimization of curvature and silica thickness core contour of inhibited-coupling Kagome fibers. 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). 2017; ():1-1.

Chicago/Turabian Style

B. Debord; M. Maurel; A. Amsanpally; M. Adnan; A. Gorse; B. Beaudou; J.-M. Blondy; L. Vincetti; F. Gerome; F. Benabid. 2017. "Experimental optimization of curvature and silica thickness core contour of inhibited-coupling Kagome fibers." 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) , no. : 1-1.

Conference paper
Published: 01 June 2017 in 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
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Summary form only given. The last few years have seen the emergence of a new class of hollow-core photonic crystal fibers (HC-PCF) no longer relying on photonic bandgap guidance but on inhibited-coupling (IC) mechanism. The first specie of this fiber family took the form of Kagome-lattice [1]. The guiding rule for enhancement of such a guidance (minimizing the coupling between the core mode and cladding mode, i.e (φ clad |Δn 2 | φ core ) → 0) led to the introduction in 2010 of hypocycloidal (or negative curvature) core contour [2] in Kagome HC-PCFs where record loss values (8.5 dB/km at 1 μm [3]) have been demonstrated. Thanks to this design, three reasons explain the reduction of such a criterion: i) the HE 11 mode field spatial overlap with silica is reduced to the tangent sections of the inner cups of the hypocycloid contour, ii) the larger perimeter of the hypocycloid contour results in a higher azimuthal-like number in the silica core-surround modes and hence, stronger transverse phase-mismatch with the core mode. iii) the spatial overlap between the core-mode with connecting nodes supporting low azimuthal number modes is strongly reduced. Recently, another hollow-core fiber design has been proposed that fully fulfils the mentioned features for IC guidance, relying on a tubular lattice with a one ring of isolated (with no connecting nodes) thin glass tubes [4]. Here, we report on the fabrication and characterization of ultra-low loss single-ring tubular lattice HC-PCFs (SR HC-PCF) guiding m the UV-VIS-NIR with absolute record loss value for HC-PCF at 750 nm with 7.7 dB/km, supplanting bandgap fiber performances in this spectral range.

ACS Style

B. Debord; A. Amsanpally; M. Chafer; A. Baz; M. Maurel; J.M. Blondy; E. Hugonnot; F. Scol; L. Vincetti; F. Gerome; F. Benabid. 7.7 dB/km Transmission loss at 750 nm inhibited-coupling guiding hollow-core photonic crystal fibers. 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) 2017, 1 -1.

AMA Style

B. Debord, A. Amsanpally, M. Chafer, A. Baz, M. Maurel, J.M. Blondy, E. Hugonnot, F. Scol, L. Vincetti, F. Gerome, F. Benabid. 7.7 dB/km Transmission loss at 750 nm inhibited-coupling guiding hollow-core photonic crystal fibers. 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). 2017; ():1-1.

Chicago/Turabian Style

B. Debord; A. Amsanpally; M. Chafer; A. Baz; M. Maurel; J.M. Blondy; E. Hugonnot; F. Scol; L. Vincetti; F. Gerome; F. Benabid. 2017. "7.7 dB/km Transmission loss at 750 nm inhibited-coupling guiding hollow-core photonic crystal fibers." 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) , no. : 1-1.

Conference paper
Published: 17 February 2017 in Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVII
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The dramatic progress in power-scaling of ultra-short pulse (USP) lasers and their growing use in industrial applications call for flexible and robust beam delivery systems (BDS) over several meters with no temporal or modal distortions. Inhibited coupling (IC) hypocycloid Kagome hollow-core photonic crystal fiber (HC-PCF) has recently proved to be an excellent solution for guiding these USP. In order to reduce further the attenuation of such fiber and then to increase the BDS capabilities, we report on an optimized IC Kagome HC-PCF exhibiting record loss level (8.5dB/km at 1030nm) associated with a 225nm wide 3-dB bandwidth and low bend sensitivity

ACS Style

B. Debord; M. Maurel; A. Amsanpally; M. Adnan; B. Beaudou; J. M. Blondy; L. Vincetti; F. Gérôme; F. Benabid. Ultra-low loss (8.5 dB/km @ Yb-laser wavelength range) inhibited-coupling Kagome HC-PCF for laser beam delivery applications. Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVII 2017, 100941M -100941M-5.

AMA Style

B. Debord, M. Maurel, A. Amsanpally, M. Adnan, B. Beaudou, J. M. Blondy, L. Vincetti, F. Gérôme, F. Benabid. Ultra-low loss (8.5 dB/km @ Yb-laser wavelength range) inhibited-coupling Kagome HC-PCF for laser beam delivery applications. Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVII. 2017; ():100941M-100941M-5.

Chicago/Turabian Style

B. Debord; M. Maurel; A. Amsanpally; M. Adnan; B. Beaudou; J. M. Blondy; L. Vincetti; F. Gérôme; F. Benabid. 2017. "Ultra-low loss (8.5 dB/km @ Yb-laser wavelength range) inhibited-coupling Kagome HC-PCF for laser beam delivery applications." Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVII , no. : 100941M-100941M-5.