bluuebunny/crossref_metadata_2025 huggingface dataset:
A Novel Optical Wireless Data Center Network Architecture Based on Passive Diffractive Optics and Fast Tunable Transmitters
Authors: Zhang Shaojuan , Tangdiongga Eduward , Calabretta Nicola
Published: October 2020

We present a novel optical wireless DCN using passive diffractive optics and fast tunable transmitters. Results show that our concept can interconnect 10240 servers with crosstalk free 1.1nm bandwidth and <6dB power loss per link.
The Perks of Using Machine Learning for QoT Estimation with Uncertain Network Parameters
Authors: Lonardi Matteo , Pesic Jelena , Zami Thierry , Rossi Nicola
Published: October 2020

We compare the resilience to network parameters uncertainty between a GN-model based QoT tool and ML-based ones. We study the mean square error of the estimated G-OSNR and a novel metric based on the overestimation probability.
Statistical Analysis of Free-Space-to-Fiber Coupling Under Atmospheric Turbulence
Authors: Krimmer Jonas , Füllner Christoph , Freude Wolfgang , Koos Christian , Randel Sebastian
Published: October 2020

Simulating the propagation of an optical field through a turbulent atmosphere and the coupling to an optical fiber reveals that a FMF or an MMF instead of an SMF can significantly increase the reliability of coherent FSO links.
Dense Photonic InP Integration for Modular Nodes in Next Generation Optical Networks
Authors: Stabile R. , Tessema N. , Prifti K. , Feyisa D.W. , Shi B. , Calabretta N.
Published: October 2020

Photonic WDM switches and photonic integrated WSS are designed as building blocks to realize novel modular metro node architectures. Advances in compact photonic integrated InP switches using the InP generic technology will be discussed.
Filter-induced OSNR penalty in WDM fiber networks when optical channel symbol rate grows beyond 80 GBaud
Authors: Zami Thierry , Lavigne Bruno , Cerutti Isabella
Published: October 2020

While channel symbol rates approach carrier spectral spacing in the modern WDM networks, we examine whether the related filtering-induced OSNR penalty still notably degrades beyond 80 GBaud, as it does from 32 to 64 GBaud.
Super-PON: technology and standards for simplifying FTTH deployment
Authors: Du Liang B. , Lam Cedric F.
Published: October 2020

Super-PON is a new standard being developed in both the IEEE and ITU-T that focuses on making FTTH deployments simpler. This paper overviews the standardization, an exemplary business case, and details of the world’s first Super-PON commercial deployment.
SOA Impact on High-Capacity DMT Signals in Switching/Aggregation Node for Future MAN
Authors: Rapisarda Mariangela , Gatto Alberto , Parolari Paola , Tessema Netsanet , Calabretta Nicola , Boffi Pierpaolo
Published: October 2020

The impact of the crossing of SOA-based MAN nodes on DMT high-capacity transmission is experimentally evaluated. We provide an optimization of the saturation levels of the SOAs enabling add/drop functionalities to preserve the transmitted throughput.
Coherent TWDM-PON Downstream Architecture Based on a Chip-Scale QD-MLLD
Authors: Adib Mosaddek Hossain , Marin-Palomo Pablo , Kemal Juned N. , Füllner Christoph , Mahmud Salek , Ramdane Abderrahim , Koos Christian , Freude Wolfgang , Randel Sebastian
Published: October 2020

We propose a novel coherent TWDM PON architecture. Using a chip-scale QD-MLLD and low-cost thermally tuned DFB lasers, we demonstrate error-free reception of 80 Gb/s at a loss budget of 28 dB with ONU laser variation of 2 nm (0.25 THz).
Integrated Optical Phased Arrays: LiDAR, Communications, Augmented Reality, and Beyond
Authors: Notaros Jelena , Notaros Milica , Raval Manan , Poulton Christopher V. , Byrd Matthew J. , Li Nanxi , Su Zhan , Magden Emir Salih , Timurdogan Erman , Dyer Thomas , Baiocco Christopher , Kim Taehwan , Bhargava Pavan , Stojanovic Vladimir , Watts Michael R.
Published: October 2020

Recent integrated optical phased array architectures, results, and applications will be reviewed, including beam steering for LiDAR and communications, near-field optical manipulation, and holographic displays for augmented reality.
Single-shot link discovery in terahertz wireless networks
Authors: Ghasempour Yasaman , Shrestha Rabi , Knightly Edward , Mittleman Daniel M.
Published: October 2020

We describe a novel method for locating mobile users in a terahertz wireless network. This measurement can be accomplished in a single shot, and is therefore compatible with low latency requirements of future wireless systems.
Advances in hybrid integrated microwave photonic systems for millimeter- and Terahertz wave generation
Authors: Carpintero Guillermo , Ali Muhsin , García-Muñoz Luis Enrique , van Dijk Frédéric , Guzman Robinson Cruzoe , Geuzebroek Douwe H. , Roeloffzen Chris G.H. , de Felipe David , Keil Norbert
Published: October 2020

The compactness and precise waveguide length control of integrated photonics are fueling the integrated microwave photonic approach, integrating key RF functions on a chip. We describe current efforts using hybrid integration to optimize the performance of different photonic components avoiding the compromises on a monolithic approach.
Machine Learning for Cognitive Optical Network Security Management
Authors: Furdek Marija , Natalino Carlos
Published: October 2020

This talk surveys the security threats pertinent to the optical network and outlines the progress and challenges in developing machine learning approaches for cognitive management of optical network security.
Design of Fibers with Erbium-Ring-Doping in the Cladding for Spatially Integrated Optical Amplifiers
Authors: LaRochelle Sophie , Matte-Breton Charles
Published: October 2020

Cladding-pumped multi-core fibers are of interest for the integration of optical amplifiers in dynamic networks. This paper reviews the design trade-offs in achieving an amplifying fiber with low gain compression and good NF performance.
Enhanced Broadband Emission in Novel Phenanthroimidazole Derivative Molecules via Excited State Intramolecular Proton Transfer
Authors: Biswas Chinmoy , Devarajan Kathirvelan , Panda Tarun K , Raavi Sai Santosh Kumar
Published: October 2020

The excited state intramolecular proton transfer has been observed in two Novel Phenanthroimidazole derivative molecules in aqueous solution of the molecules. Formation of new excited state species and large stokes shift of emission ~0.38eV for F3 and 0.49 eV for F5 has been recorded, suggesting their potential application in chemical and biological probing and imaging.
Circular polarizer based on chiral metamaterial with twisted split-ring resonators
Authors: Shen A. , Li Y. H. , Xu H. X. , Shen Z.
Published: October 2020

In this paper, a three-layer ring structure is proposed, which can realize the transmission of sinistral circular light and the conversion of dextral circular light into sinistral circular light.
Molecular Chirality Detection Using the Electric Quadrupole Resonance of Chiral Nanoparticles
Authors: Kim Taehyung , Park Q-Han
Published: October 2020

We show that the colloidal chiral nanoparticles can detect the chirality of randomly dispersed molecules. The chiroptic response at the electric quadrupole resonance of nanoparticles increases the efficiency of detecting surrounding chiral molecules.
Nonlinear Response of Water Vapour at THz Frequencies
Authors: Rasekh Payman , Safari Akbar , Yildirim Murat , Bhardwaj Ravi , Ménard Jean-Michel , Boyd Robert W. , Dolgaleva Ksenia
Published: October 2020

Terahertz (THz) nonlinear optics is an emerging field enabled by recent developments in the generation of THz pulses with higher intensities. THz radiation can interact with the vibrational/rotational resonances of molecules. For example, vapour in the atmosphere shows a very rich absorption spectrum with hundreds of sharp resonances below 3 THz. We report on the first experimental demonstration of the nonlinear interaction of THz pulses with water vapour. We observed a strong nonlinear response of the vibration/rotation resonances to the THz pulses in the form of reverse saturation of absorption.
Nonlinear optical isolators based on thin-film vanadium dioxide and metallic frequency-selective surfaces
Authors: Wan Chenghao , King Jonathan , Kats Mikhail A.
Published: October 2020

We design a nonlinear optical isolator by incorporating a metallic frequency-selective surface with thin-film vanadium dioxide. According to our opto-thermal simulations, the extinction ratio of our design is comparable with those of commercial linear isolators.
Bend Loss in Negative Curvature Fibers with Truncated Cladding Tubes
Authors: Wei Chengli , Menyuk Curtis R. , Hu Jonathan
Published: October 2020

We study negative curvature fibers with truncated cladding tubes. The fiber with truncated cladding tubes has lower bend loss compared to the un-truncated fiber when the bend radius is between 4 cm and 7 cm.
Polymer-Based Metamaterials for Synergistic Light and Heat Management
Authors: Boriskina Svetlana V. , Lozano L. Marcelo , Huang Yi , Korolovych Volodymyr , Chen Gang , Alberghini Matteo , Fasano Matteo , Asinari Pietro , Miroshnichenko Andrey , Hattori Haroldo , Morozov Evgeny , Ogsood Richard M. , Donovan Brian , Warzoha Ronald , Lee Daeyeon
Published: October 2020

We will discuss new metamaterials with tunable photon and phonon transport properties achieved by either sculpting the meso-scale structure of polymers or using polymers to sculpt the internal structure of nanoparticle arrays.
Photosensitivity functionalization of PDMS for femtosecond laser writing
Authors: Boisvert Jean-Sébastien , Hlil Antsar , Thomas Jyothis , Garcia-Puente Yalina , Riaz Ali , Ledemi Yannick , Messaddeq Younes , Kashyap Raman
Published: October 2020

We demonstrate photosensitization of PDMS using a germanium derivative and benzophenone (BP) as photosensitizing agents. Femtosecond laser written structure featuring high phase shift are reported, opening the way of ultra-tunable photonics devices.
Plasmonic Random Laser for Artefact-free Imaging
Authors: Radhakrishnan Gayathri , Suchand Sandeep C. S. , Gummaluri Venkata Siva , Vijayan C. , Matham Murukeshan Vadakke
Published: October 2020

We report the use of a plasmonic random laser as an illumination source for microscopic imaging. The high correlation coefficient (0.91) quantifies the random laser’s ability to preserve information from disruptions caused by coherent artefacts.
High-Power (>13 W) Quantum-Cascade Lasers for Long Wavelength Infrared Range
Authors: Dudelev V. V. , Savchenko G. M. , Mikhailov D. A. , Cherotchenko E. D. , Babichev A. V. , Gladyshev A. G. , Losev S. N. , Novikov I. I. , Denisov D. V. , Kuchinskii V. I. , Lyutetskiy A. V. , Slipchenko S. O. , Pikhtin N. A. , Karachinsky L. Ya. , Egorov A. Yu. , Sokolovskii G. S.
Published: October 2020

We report on room-temperature quantum-cascade lasers emitting in the 8 µm wavelength range with the optical power exceeding 13 W. High-power operation was achieved by reduction of the optical losses on the upper metal contact.
Demonstration of a stable, tunable random laser
Authors: Hlil A. R. , Thomas J. , Boisvert J-S. , Lima B. C. , García-Puente Y. , Maia L. J. Q. , Ledemi Y. , Messaddeq Y. , Gomes A. S. L. , Kashyap R.
Published: October 2020

We demonstrate a stable random laser (RL) consisting of a stretchable elastomer polymer composite containing Nd: YAB(NdxY1-xAl3B4O12) nanoparticles (where x is between 0.2, and 1.0), which can be tuned conveniently by controlling the strain by stretching.
Observation and Control of a Tamm Plasmon Confined under a Metasurface
Authors: Buchnev Oleksandr , Belosludtsev Alexandr , Reshetnyak Victor , Evans Dean R. , Fedotov Vassili A.
Published: October 2020

We demonstrate experimentally that Tamm plasmons can be supported by a dielectric mirror interfaced with a metasurface, a discontinuous thin metal film periodically patterned on the sub-wavelength scale. Not only do Tamm plasmons survive the nano-patterning of the metal film, but they also become sensitive to external perturbations, as a result. In particular, by depositing a nematic liquid crystal on the outer side of the metasurface we were able to red-shift a Tamm plasmon by 35 nm, while electrical switching of the liquid crystal enabled us to tune the wavelength of this notoriously inert excitation within a 10 nm range.
A Highly-Efficient and Compact Surface Plasmon Polaritons-based Long-Wavelength Cut-off Filter at Telecom Wavelengths
Authors: Ebadi Seyed Morteza , Örtegren Jonas
Published: October 2020

This paper describes numerical results of an ultra-compact and efficient plasmonic cut-off filter based on a MIM waveguide. Simulation results confirm that by adjusting structural parameters, the desired spectral response can be easily obtained.
A Reconfigurable and Ultra-Compact Plasmonic Filter based on MIM Waveguides at Optical Channels
Authors: Ebadi Seyed Morteza , Örtegren Jonas
Published: October 2020

This paper reports design and simulation of a tunable highly-efficient reconfigurable plasmonic filter based on MIM waveguides. Simulation results shown that by adjusting structural parameters, the device can work as a multipurpose optical circuit.
Development of an LSPR Nanoaptasensor for AFB1 Screening in Amaranth Extract Solutions
Authors: Veliz Lorena , Licuona Mary , Cordova Sara , Hernández Yulán , Galarreta Betty C.
Published: October 2020

LSPR nanoaptasensor based on gold nanotriangles and aptamers were developed for the determination of AFB1 in the ppbs level. We tested our nanosensor using different solvents systems and in a complex matrix such as amaranth or kiwicha.
A Biphasic Liquid System for Low-Power Optothermal Bubble Generation and Enhanced Surface Binding of Proteins
Authors: Kim Youngsun , Zheng Yuebing
Published: October 2020

A perfluoropentane-in-water biphasic system, capable of optothermally generating microbubbles at low power, enhanced surface binding of protein by the bulk-to-surface concentration with minimal loss in its activity.
Nonlinear and topological metaphotonics
Authors: Kivshar Yuri
Published: October 2020

I will outline briefly the major concepts of all-dielectric Mie-resonant metaphotonics, and also summarize recent original results on nonlinear and topological photonics, and lasing metacavities.
Broadband, Temperature-Stable, Reflective Additives to Enhance Thermal Radiation Protection Systems
Authors: Christidis George , Koch Ueli , Poloni Erik , De Leo Eva , Cheng Bojun , Koepfli Stefan M. , Dorodnyy Alexander , Bouville Florian , Fedoryshyn Yuriy , Shklover Valery , Leuthold Juerg
Published: October 2020

Metal-dielectric platelets are introduced as additives to heat protection systems. The platelets feature high reflectivity across 700 nm and thermal stability up to 1000°C. Impregnating aerospace heat shields improves thermal reflectivity by a factor 11.
Doping Engineered InSe Flakes for High Mobility Phototransistor
Authors: Inbaraj Christy Roshini Paul , Mathew Roshan Jesus , Sankar Raman , Lee Chih-Hao , Chen Yang-Fang
Published: October 2020

Sn doped InSe crystal has a reduced oxide phase and enhanced electron mobility. Along with the substrate modification, the mobility enhances to 2560±240 cm2 V-1s-1. Moreover, it exhibits a piezo-phototronic effect useful for practical implementation
Electro-optical interrogation of surface plasmons in an optical switch
Authors: Pae Jian Yi , Medwal Rohit , Nair Radhika V. , Chaurasiya Avinash , Rawat Rajdeep Singh , M. Murukeshan V.
Published: October 2020

The electro-optically interrogated surface plasmons device consists of a heterolayer structure formed by Au, graphene, and an ion-gel layer. Tuning of the reflectance was achieved by applying an external electric field across the heterolayer.
Ultra-High-Q Resonance in a Plasmonic Metasurface
Authors: Reshef Orad , Bin-Alam M. Saad , Mamchur Yaryna , Alam M. Zahirul , Carlow Graham , Upham Jeremy , Sullivan Brian T. , Ménard Jean-Michel , Huttunen Mikko J. , Dolgaleva Ksenia , Boyd Robert W.
Published: October 2020

We experimentally demonstrate a metasurface with an ultra-high Q-factor (≈2400), based on surface lattice resonances. This platform can be adopted for nanopho-tonic applications such as nano-lasing, sensing, and nonlinear optical processes.
Light Coherent Propagation and Enhanced Emission from Fractal Networks of Er-decorated Silicon Nanowires
Authors: Faro Maria Josè Lo , Leonardi Antonio Alessio , Priolo Francesco , Miritello Maria , Fazio Barbara , Volpe Giorgio , Irrera Alessia
Published: October 2020

Erbium-doped Si nanowires fractals arise as promising photonic platforms for integrated devices due to their tunable optical response. The coherent propagation of light combined with quantum effects foster novel perspectives for light management.
Stimulated Four-Wave Mixing in Silicon Nitride Waveguides for Coherent Anti-Stokes Raman Scattering
Authors: Würthwein Thomas , Lüpken Niklas M. , Epping Jörn P. , Boller Klaus-J. , Fallnich Carsten
Published: October 2020

For a compact Raman microscopy setup stimulated four-wave mixing in silicon nitride waveguides was used as a light source, driven by an ultrafast low-energy Ytterbium-fiber laser and being tuned via the narrowband low-power continuous-wave seed source.
Bound States in the Continuum for Enhanced Generation of High Optical Harmonics
Authors: Koshelev Kirill , Zograf George , Korolev Viacheslav , Zalogina Anastasia , Choi Duk-Yong , Hollinger Richard , Luther-Davies Barry , Zürch Michael , Kartashov Daniil , Spielmann Christian , Makarov Sergey , Kruk Sergey , Kivshar Yuri
Published: October 2020

Through the utilization of optical bound states in the continuum supported by resonant Si metasurfaces in the mid-IR spectral range, we demonstrate generation of odd optical harmonics, from the 3rd to the 11th order.
Tunable third-harmonic generation using phase-change chalcogenides
Authors: Zhu Muliang , Abdollahramezani Sajjad , Adibi Ali
Published: October 2020

We demonstrate a Ge2Sb2Te5 (GST)-based asymmetric Fabry-Perot cavity facilitating broadband continuous tuning of third-harmonic generation (THG) due to the nonvolatile high contrast intermediate states.
Electro-optic detection of terahertz radiation using a zinc sulfide crystal probed by the second harmonic of an Ytterbium laser
Authors: Nkeck Joel Edouard , Ropagnol Xavier , Nechache Riad , Blanchard François
Published: October 2020

We report on the electro-optical (EO) detection of subpicosecond terahertz (THz) pulses using a <110> cut non-centrosymmetryc crystal of zinc sulphide (ZnS). Its EO efficiency, using the second harmonic generation (SHG) of an Ytterbium (Yb) laser (514 nm,) is compared to the EO efficiency using a <110> cut crystal of cadmium telluride (CdTe) at the fundamental wavelength of the laser (1028 nm).
Ultrabroadband Nonlinear Optics in Nanophotonic Lithium Niobate Waveguides
Authors: Jankowski Marc , Langrock Carsten , Desiatov Boris , Marandi Alireza , Wang Cheng , Zhang Mian , Phillips C. R. , Loncar Marko , Fejer M. M.
Published: October 2020

We demonstrate ultra-broadband nonlinear interactions in dispersion-engineered periodically poled lithium niobate (PPLN) waveguides. These waveguides achieve second-harmonic generation (SHG) with >250-nm of bandwidth, and multi-octave supercontinuum generation (SCG) with record-low pulse energies.
Pyroelectric field-assisted domain inversion in ferroelectric crystals: Role of temperature
Authors: Imbrock Jörg , Szalek Dominik , Laubrock Simon , Hanafi Haissam , Denz Cornelia
Published: October 2020

Ferroelectric domains are fabricated by patterning lithium niobate and lithium tantalate crystals with femtosecond laser pulses and subsequent heating to elevated temperatures. We investigate the role of temperature on the domain inversion process.
χ(3) nonlinear fast imaging and its relative quantification after thermal poling of niobium borophospate glass
Authors: Rajaofara Zakaniaina , Leproux Philippe , Dussauze Marc , Rodriguez Vincent , Karam Lara , Duclère Jean-René , Couderc Vincent
Published: October 2020

We present a 2D spatial mapping of the χ(3) susceptibility of a niobium borophosphate glass after thermal microprinting of a second order nonlinearity. χ(3) reduction is evidenced in the poled areas using coherent Raman imaging.
Adiabatic Soliton Transport and Its Application for All Optical Isolation
Authors: Yesharim Ofir , Karnieli Aviv , Li Yongyao , Arie Ady
Published: October 2020

We present and numerically study the dynamics of a spatial quadratic soliton near an interface that is changing adiabatically. We demonstrate the applicability of this design for an all optical passive isolator.
Omni-directional phase matching in integrated zero-index media
Authors: Gagnon Justin , Reshef Orad , Alam M. Zahirul , Espinosa Daniel H.G. , Upham Jeremy , Dolgaleva Ksenia , Mazur Eric , Boyd Robert W.
Published: October 2020

We experimentally demonstrate omni-directional phase matching via four-wave mixing in zero-index silicon waveguides exhibiting phase-free propagation in the infrared range. This property can be exploited to miniaturize integrated nonlinear devices.
Unveiling nonlinear light amplification in dielectrics
Authors: Winkler Thomas , Zielinski Bastian , Sarpe Cristian , Ciobotea Ramela , Sneftrup Peter , Møller Søren , Senftleben Arne , Baumert Thomas , Balling Peter
Published: October 2020

We present our observation of nonlinear light amplification under optical excitation of sapphire and fused silica via femtosecond imaging spectroscopy and discuss possible mechanisms and implications in the view of current and future applications.
Spatial beam self-cleaning dynamics in Erbium-Ytterbium (Er-Yb) codoped multimode fiber
Authors: Niang A. , Mangini F. , Modotto D. , Tonello A. , Minoni U. , Fabert M. , Couderc V. , Wabnitz S.
Published: October 2020

We demonstrate self-induced high beam quality recovery in Er-Yb codoped multimode active fiber with parabolic refractive index profile of the core. Nonlinear beam cleanup is accompanied by Raman and parametric instability sideband generation.
Nonlinear beam cleanup in Yb-doped GRIN multimode fiber taper
Authors: Niang A. , Modotto D. , Tonello A. , Mangini F. , Minoni U. , Zitelli M. , Fabert M. , Jima M.A. , Egorova O.N. , Levchenko A.E. , Semjonov S.L. , Lipatov D.S. , Babin S. , Couderc V. , Wabnitz S.
Published: October 2020

We demonstrate beam self-cleaning in a tapered Ytterbium-doped graded-index multimode fiber in both active and passive configurations, without accompanying self-phase modulation induced spectral broadening or frequency conversion.
Spatiotemporal Dynamics in the Fractional Nonlinear Schrödinger Equation
Authors: Copeland Austin , Aceves Alejandro
Published: October 2020

Inspired by work on fractional Quantum Mechanics and Levy path integrals, recently we have seen increased interest in extending this concept in optical settings. Here we present our first results in the spatio-temporal regime
Temporal localized structures in doubly resonant dispersive optical parametric oscillators
Authors: Parra-Rivas P. , Gelens L. , Leo F.
Published: October 2020

We study the formation, bifurcation structure and stability of temporal localized states in dispersive doubly resonant optical parametric oscillators. We show that these states undergo collapsed snaking.
Nonlinear Pulse Shaping in Optical Fibres with a Neural Network
Authors: Boscolo Sonia , Finot Christophe
Published: October 2020

We use a supervised machine-learning model based on a neural network to solve the direct and inverse problems relating to the shaping of optical pulses that occurs upon nonlinear propagation in optical fibres.
Bandwidth-Limited Few-Cycle Pulses by Nonlinear Compression in a Dispersion-Alternating Fiber
Authors: Lüpken Niklas M. , Fallnich Carsten
Published: October 2020

We present pulse compression in a fiber with alternating dispersion sign. Repetitive bandwidth generation and recompression leads to few-cycle pulses. We show compression to bandwidth-limited pulses by using a special dispersion compensating fiber.
Full Temporal Characterization of Few-Cycle Laser Pulses Using Commercial BaTiO3 Second-Harmonic Nanoparticles
Authors: Pérez-Benito Oscar , Weigand Rosa
Published: October 2020

We measure sub-7-fs laser pulses using commercially available BaTiO3 second-harmonic nanoparticles and the dispersion-scan technique. Scattering plays a key role in the retrieval algorithm to obtain the same results as in Beta-Barium-Borate crystals.
Experimental generation of an optical pulse doublet from the nonlinear splitting of a super-Gaussian pulse
Authors: FINOT Christophe
Published: October 2020

We present the intensity and phase experimental characterization of the generation of a temporal pulse doublet from the propagation of an initial super-Gaussian waveform in a nonlinear focusing medium.
Dielectric metasurfaces for second harmonic generation and wavefront shaping
Authors: Gigli Carlo , Marino Giuseppe , Rocco Davide , Vincenti Maria Antonietta , De Angelis Costantino , Leo Giuseppe
Published: October 2020

We propose a robust design for both second harmonic generation and its wavefront control in an AlGaAs-on-sapphire metasurface. In analogy with optical phased arrays, we achieve 0-2π phase modulation on the second harmonic.
Dissipative Optical Breather Molecular Complexes
Authors: Peng J. , Zhao Z. , Boscolo S. , Finot C. , Sugavanam S. , Churkin D. , Zheng H.
Published: October 2020

We demonstrate different types of breathing soliton complexes in a mode-locked fibre laser: multi-breather molecules, and molecular complexes arising from the binding of two breather-pair molecules or a breather-pair molecule and a single breather.
Virtual Aperture Based Z-scan Technique
Authors: Antony Maria Merin , Suchand Sandeep C. S. , Matham Murukeshan Vadakke
Published: October 2020

We demonstrate and verify the use of software generated virtual apertures on image based open-aperture z-scan data to simplify the z-scan technique to a single measurement, eliminating physical aperture alignment relates issues
Near-field THz imaging of a printed metallic checkerboard pattern
Authors: Guiramand L. , Zhuldybina M. , Arikawa T. , Tanaka K. , Blanchard F.
Published: October 2020

We report on low frequency terahertz near-field imaging using a wide field of view electro-optical sampling method. The sample consists of a printed metal checkerboard and is resolved with a spatial resolution of λ/35 at 220 GHz.
Noise pulses’ statistics in CW ytterbium-doped fiber laser and its effect on self-phase modulation
Authors: Barmenkov Yuri O. , Muniz-Cánovas Pablo , Kir’yanov Alexander V. , Cruz José L. , Andrés Miguel V.
Published: October 2020

We report an experimental study of photon noise in a CW double-clad pumped YDFL with Fabry-Perot cavity. Photon noise statistics and its impact on laser line broadening via self-phase modulation are discussed.
Modeling of solitons and platicons in self-injection locking regime
Authors: Kondratiev Nikita M. , Lobanov Valery E. , Bilenko Igor A.
Published: October 2020

We developed a numerical model describing the process of frequency comb generation in the self-injection locking regime. Generation of solitons and platicon self-injection locking regime was studied.
Nonreciprocal Silicon Photonic Coupler Exploiting Graphene Saturable Absorption
Authors: Chatzidimitriou Dimitrios , Pitilakis Alexandros , Yioultsis Traianos , Kriezis Emmanouil
Published: October 2020

We present a broadband half-duplex high-power photonic isolator using the exceptional point in a non-Hermitian nonlinear silicon slot coupler. The concept relies on spatially asymmetric saturable losses, by overlaying one waveguide with graphene.
Modeling Graphene’s Macroscopic Nonlinear Response
Authors: Castelló-Lurbe David , Thienpont Hugo , Vermeulen Nathalie
Published: October 2020

We present a closed-form expression that predicts graphene’s nonlinear-optical refractive response induced by optical pulses. Our semianalytical approach allows maintaining the nonlinear-pulse-propagation formalism in graphene-covered waveguides.
Universal mapping of topological singularities
Authors: Xia Shiqi , Liu Xiuying , Jajtić Ema , Song Daohong , Li Denghui , Tang Liqin , Leykam Daniel , Xu Jingjun , Buljan Hrvoje , Chen Zhigang
Published: October 2020

We report universal mapping of topological Dirac-like points in momentum-space to optical vortices in real-space. This conversion persists even in stretched lattices, topologically protected by a quantized Berry phase.
The dynamics of excitability in a Q-switched all-fibre laser
Authors: Otupiri Robert , Garbin Bruno , Krauskopf Bernd , Broderick Neil G.R.
Published: October 2020

We report on excitability in an all-fibre laser with saturable absorber. Specifi-cally, we present how the experimental laser response depends on the properties of external input pulses, which we find to be in good agreement with theoretical findings.
Ultrafast random Raman solitons for real time Tbps random number generation
Authors: Monet Frédéric , Boisvert Jean-Sébastien , Kashyap Raman
Published: October 2020

Using an optimized 100 mm long fiber Bragg grating, a narrow-linewidth, tunable high power random Raman fiber laser is demonstrated. At high enough powers, modulation instability is observed, leading to the generation of random solitons, with an average duration of 160 fs. By sampling the signal at 256 GSa/s and extracting the 5 least significant bits, random numbers can be generated in real-time at 1.28 Tbps with minimal post-processing.
Polarization faticon in normally dispersive Kerr resonators
Authors: Fatome Julien , Erkintalo Miro , Murdoch Stuart G. , Coen Stephane
Published: October 2020

We report on a novel kind of bright polarization structure, called faticon, occurring in normally dispersive isotropic Kerr resonators. We show that these structures can be addressed individually and exploited as bit-entities for optical buffering.
Directional dipole radiations and long-range quantum entanglement mediated by hyperbolic metasurfaces
Authors: Fang Wei , Yang Yaping
Published: October 2020

In the vicinity of two-dimensional structures, the excitation of deep subwavelength polaritonic modes can be realized owing to the presence of free-carrier motion. Here we consider the launching of surface plasmonics in hyperbolic metasurfaces and theoretically demonstrate that the radiation energy of quantum emitter channels along specific directions was determined by the conductivity tensor of the surface. While the propagating length of the suface plasmon field supported by isotropic surfaces is normally limited on the scale of subwavelength to several vacuum wavelengths, it may be largely amplified when hyperbolic metasurfaces have been applied. Based on these exciting properties, prominent super- and subradiant behaviors between two distant quantum emitters are observed by engineering the anisotropy of the metasurfaces. Further investigations show that the directional collective interactions supported by the metasurfaces enable the generation of quantum entanglement over macroscopic dipole separations, with large values of concurrence, and allow remarkable revivals from sudden death. Our proposal can easily be extended to systems that include multiple quantum emitters interacting through hyperbolic metasurfaces and thus may have potential applications in on-chip science that aims at quantum information processing and quantum networks.
Quadrature phase detection based on an extrinsic Fabry–Pérot interferometer for vibration measurement
Authors: Zhang Zihua , Jiang Chunlei , Wang Fuli , Huang Zhen , Shen Liqun , Li Chengwei
Published: October 2020

A novel vibration measurement system based on a fiber-optic extrinsic Fabry–Pérot interferometer is established. Two quadrature interferometry signals are obtained in accordance with the 90° phase shift between two output arms of a 2×2 fiber coupler. This outcome drastically simplifies the processing of collected data because only a single arctangent operation is needed to calculate the wrapped phase. Repetitive test results show that the relative micro-vibration reconstruction error of this method is less than 0.12%. This structure simplifies the extrinsic Fabry–Pérot signal demodulation process, which has guiding significance for the online measurement of high-precision physical quantities.
How carrier memory enters the Haus master equation of mode-locking
Authors: Hausen Jan , Lüdge Kathy , Gurevich Svetlana V. , Javaloyes Julien
Published: October 2020

We present a generalization of the Haus master equation in which a dynamical boundary condition allows to describe complex pulse trains, such as the

Q

-switched and harmonic transitions of passive mode-locking, as well as the weak interactions between localized states. As an example, we investigate the role of group velocity dispersion on the stability boundaries of the

Q

-switched regime and compare our results with that of a time-delayed system.
Resonant filters with concurrently tuned central wavelengths and sidebands
Authors: Ko Y. H. , Gupta N. , Magnusson R.
Published: October 2020

Tunable infrared filters are important for various optical and optoelectronic systems. Ideally, such filters should span wide spectral ranges while retaining constant performance. Here, as a fundamental approach, we theoretically treat tunable resonant filters and realize favorable spectral profiles. Implementing a chirped zero-contrast grating on wedged sublayers, we optimize the resonant tunable filter for operation in the

∼

5
−
14

µ

m

band. To clarify the root causes of the physical processes enabling the observed performance, attendant resonance modal processes and background reflection behavior are analyzed in detail by equivalent models as well as by rigorous electromagnetic models. The key innovative contribution of this research is that it enables efficient filters with simultaneously tuned operational wavelengths and sidebands.
Step-index fibre from metal halide chalcogenide glasses
Authors: Carcreff Julie , Masselin Pascal , Boussard-Plédel Catherine , Kulinski Pierre , Troles Johann , Coq David Le
Published: October 2020

The GeS2-Ga2S3 vitreous matrix can incorporate metal halides in its network allowing the properties of the glasses to be adjusted following the composition. In this work, different systems containing either CsCl, CsI, CdCl2, or CdI2 are investigated in order to determine the compositions having the most suitable properties for drawing a step-index fibre. Indeed, transition glass temperatures and optical parameters such as the optical band-gap, the linear and nonlinear refractive indexes are given. The preforms were prepared using the rod-in-tube technique and multimode step-index fibres were successfully drawn. This initial work led from these glass families, which also show both the possibility to be rare-earth doped and to be permanently photo-written by a femtosecond laser, paves the way to a future mid-IR laser fibre.
Direct laser writing lithography using a negative-tone electron-beam resist
Authors: Kim H. S. , Son B. H. , Kim Y. C. , Ahn Y. H.
Published: October 2020

We used a negative-tone e-beam resist (N-ER) to perform direct laser writing lithography based on a single-photon absorption process with a 405-nm laser source. The linewidth of the N-ER reached 150 nm, which is over three times thinner than that of a conventional photoresist. To optimize the process, the linewidth, lithographic contrast, and aspect ratio of the N-ER were investigated with respect to the dose and baking temperature. We were able to achieve a lithographic contrast of 4.8 and a maximum aspect ratio of 1.43, thereby confirming the superior resolution of the N-ER.
Comparison of propagation properties of circular edge dislocation beams and circular−linear edge dislocation beams
Authors: Gao Penghui , Bai Lu , Li Jinlu
Published: October 2020

In this study, based on the extended Huygens–Fresnel principle, the propagation expressions of circular edge dislocation beams and circular–linear edge dislocation beams were obtained. The propagation properties of the two types of beam were compared in free space and atmospheric turbulence. The results show that, when circular–linear edge dislocation beams propagate in free space or atmospheric turbulence, because the linear edge dislocation is located in different beam locations, circular edge dislocation vanishes or evolves into a pair of optical vortices. However, when circular edge dislocation beams propagate in space, circular edge dislocation exists stably in free space propagation, while it evolves into a pair of optical vortices in atmospheric turbulence propagation. Therefore, the propagation properties of circular edge dislocation can be adjusted by adding linear edge dislocation when circular edge dislocation beams propagate through free space and atmospheric turbulence. This research can be useful for applications in optical communications.
Higher Order Acousto-Optic Interaction in Two Mode Fiber in case of Intramodal and Intermodal Brillouin Scattering
Authors: Suchita  , Srinivasan Balaji , Venkitesh Deepa
Published: October 2020

Multi-peak Brillouin gain spectrum is modeled for intramodal and intermodal Stimulated Brillouin scattering process. It shows that the SBS gain due to L1
l
modes in the intermodal process is significantly higher than of L0
l
modes.
Using k-Nearest Neighbor Algorithm to Identify Mechanical Vibrational Modes of a Cantilever with Spectrally Multiplexed Fiber Bragg Gratings
Authors: Jantzen Senta L. , Yu Jiarui , Smith Peter G. R. , Holmes Christopher
Published: October 2020

We demonstrated for the first time the identification of mechanical modes of a cantilever with attached fiber Bragg gratings using k-Nearest Neighbor, a machine learning algorithm. We analyzed the frequency range of 40-300 Hz and an acceleration of 1.1±0.1 g.
Switching behavior of pixelated holograms for retinal projection display
Authors: COLARD Matthias , MARTINEZ Christophe , HAEBERLÉ Olivier
Published: October 2020

We present design considerations for the development of a retinal projection display based on pixelated holograms. Herein, we focused on the writing and the characterization of pixels, and a simulation of expected results is provided.
A phase-compensation method for broadband multilayer reflectors design
Authors: Barco O. del , Sola I. J. , Conejero-Jarque E. , Bueno J. M.
Published: October 2020

A novel theoretical method to achieve a complete optimization of dielectric multilayers is presented. The “phase-compensation method” can be used to select ad hoc dielectric mirrors with specified parameters for ultrashort pulse propagation.
Downside of wavelength assignment aware of intra-OXC add/drop contention in WDM networks
Authors: Zami Thierry , Morea Annalisa
Published: October 2020

We examine how the ultimate performance of WDM networks is affected when the wavelength assignment strategy aims at minimizing their number of colorless/directionless add/drop blocks, and so why contentionless optical node layout is preferable.
Improved Power Budget in an 8 × 8 Lossless SOA-based Photonic Switch in InP Platform
Authors: Mojaver Hassan Rahbardar , Leong Kin-Wai , Tolstikhin Valery , Liboiron-Ladoucour Odile
Published: October 2020

A design for an 8 × 8 SOA-based optical switch in InP is experimentally demonstrated at 1310 nm. In this design the on-chip shuffle network loss is reduced by 11 dB.
Enhancement of Power Efficiency in Volume Holographic Mode (De-)multiplexer with Dual-Wavelength Method
Authors: Goto Yuta , Okamoto Atsushi , Hayashi Hotaka , Shinada Satoshi , Takahata Taketoshi , Wada Naoya
Published: October 2020

For mode-division multiplex transmission, a volume holographic mode (de-) multiplexer with dual-wavelength method has been proposed. We experimentally achieved the 13 times power efficiency by considering the condition of hologram recording.
3D-Hyper-FleX-LION: A Flat and Reconfigurable Hyper-X Network for Datacenters
Authors: Liu Gengchen , Proietti Roberto , Fariborz Marjan , Fotouhi Pouya , Xiao Xian , Ben Yoo S. J.
Published: October 2020

We propose a flat datacenter network using silicon photonic switches. Simulations show up to 2× improvement in throughput-per-watt over a non-oversubscribed Fat-Tree while providing > 2× reduction in the number of switching ASICs and transceivers.
Photonic Memory Disaggregation in Datacenters
Authors: Shalf John , Michelogiannakis George , Austin Brian , Groves Taylor , Ghobadi Manya , Dennison Larry , Gray Tom , Shen Yiwen , Teh Min Yee , Glick Madeleine , Bergman Keren
Published: October 2020

Datacenter and HPC workloads have diverse memory capacity requirements, but typical node architectures accommodate a superset of those requirements. High bandwidth density photonic link technologies enable efficient memory disaggregation – potentially reducing wasted memory capacity by 8-10x.
Subcell Segmentation for the Optimization of a Four-Subcell Multijunction Solar Cell Design
Authors: Hunter Robert F.H. , Valdivia Christopher E. , Baribeau Laurier S. , Hinzer Karin
Published: October 2020

Detailed balance calculation of subcell segmentation in the extension of the InGaP/InGaAs/Ge system to 4-subcell designs shows performance above the level of the standard optimal bandgap is achievable in conjunction with other practical advantages.
Challenges for silicon heterojunction solar cells: Toward thinner device and new contact development
Authors: SAI Hitoshi , MATSUI Takuya
Published: October 2020

Silicon heterojunction solar cell architecture is one of the industrial high-efficiency solar cell concepts, highlighted by its potential for a high open circuit voltage. It is also suited to light-weight flexible applications because of its capability to very thin wafers. In this work, the potential of very thin SHJ solar cells is investigated. In addition, new contact materials are investigated further improvement from the optical point of view.
Temperature-Dependent Carrier Generation and Recombination Rates in Bifacial Silicon Heterojunction Solar Cells
Authors: Tonita Erin M. , Lewis Mandy R. , Valdivia Christopher E. , Bertoni Mariana I. , Hinzer Karin
Published: October 2020

Recombination rates of bifacial silicon heterojunction solar cells are simulated as temperature increases from -40ºC to 80ºC, demonstrating a 3× reduction in recombination probability and an open-circuit voltage temperature-coefficient of -1.9 mV/ºC.
Shallow nanotextures for light management in monolithic perovskite-silicon tandem solar cells
Authors: Becker Christiane , Sutter Johannes , Tockhorn Philipp , Vilches Anna Belen Morales , Stannowski Bernd , Albrecht Steve
Published: October 2020

We demonstrate shallow nanotextures for light management in solution-processed perovskite and in silicon heterojunction solar cells. Reduced reflectance losses enable increased efficiencies of nanotextured perovskite-silicon tandem solar cells.
High quality all inorganic halide lead perovskites microlasers pumped by continuous wave lasers
Authors: Xu Long , Xu Caixia
Published: October 2020

High quality laser action were investigated in CsPbBr3 perovskite microplate pumped by continuous wave lasers at 785 nm and 532 nm with a Q-factor over 5000, which is promising in designing electrical pumped lasers.
Measurement of the Electrostriction-Induced Refractive Index Modulation Using Long Period Fiber Gratings
Authors: Sánchez L. A. , Díez A. , Cruz J. L. , Andrés M. V.
Published: October 2020

We report the measurement of the refractive index modulation in optical fibers generated by electrostrictively driven acoustic waves through the change in transmission in a long period fiber grating.
Ge-doped Coupled Ring Fiber with Large Negative Dispersion for Vortex Modes
Authors: Geng Wenpu , Fang Yuxi , Wang Yingning , Bao Changjing , Wang Zhi , Liu Yan-ge , Huang Hao , Ren Yongxiong , Pan Zhongqi , Yue Yang
Published: October 2020

We propose and design a highly dispersive silica fiber for vortex modes using GeO2-doped high-index coupled ring structure. A large negative dispersion of -59,238 ps/(nm·km) is achieved for OAM1,1 mode at 1536.6 nm.
3D Printed Silica Optical Fibre - a “Game Changer” Technology in Optical Fibre Manufacture
Authors: Chu Yushi , Fu Xinghu , Luo Yanhua , Canning John , Zhang Jianzhong , Cook Kevin , Peng Gang-Ding
Published: October 2020

Based on 3D printing technology, multi-core doped silica optical fibre has been fabricated. The demonstration heralds a new fibre manufacturing milestone one that enables the design of fibres not previously feasible.
Femtosecond laser inscription of straight waveguide in fewmode fiber for vector bend sensing
Authors: Rong Zhao , Shu Xuewen
Published: October 2020

We have proposed a vector bend sensor based on a novel in-fiber Mach-Zehnder interferometer which is formed by an off-axial straight waveguide inscribed in a few-mode fiber spliced between two standard single mode fibers.
Noise evolution in all-normal dispersion fiber supercontinuum and its impact on ultrafast experiments and few-cycle pulse generation
Authors: Sierro Benoît , Heidt Alexander M.
Published: October 2020

We simulate nonlinear compression experiments using all-normal dispersion fibers to assess the impact of quantum shot noise and technical noise on ultrafast experiments. Technical noise shows little to no impact with realistic pump pulse parameters.
Simplified Optics for Efficient Filled-Aperture Coherent Beam Combination
Authors: Aleshire Christopher , Steinkopff Albrecht , Jauregui Cesar , Klenke Arno , Tünnermann Andreas , Limpert Jens
Published: October 2020

A simplification strategy for Segmented Mirror Splitters used as beam combiners is presented. Numerical methods are used to optimize design parameters and maintain a high theoretical combining efficiency for several tens of beams.
Fabrication of Yb doped Confined Core Active Fiber through Vapor Phase Chelate Delivery Technique
Authors: Choudhury Nilotpal , Palit Samar , Dhar Anirban
Published: October 2020

Yb doped confined core optical fiber with NA 0.08; Yb3+ 2800ppm using MCVD-Chelate Delivery technique is reported. Different fabrication parameters are optimized to achieve a repeatable process with good uniformity along 30cm length of preform.
CW and Short Pulsed Single Ytterbium-doped XLMA-Fiber-Laser with Highest Beam Quality and Pulse Energy
Authors: Lange R. , Witte U. , Ackermann M. , Schmid L. , Rehmann G. , Krause V.
Published: October 2020

Based on a single fiber, a laser for both cw- and ns-pulsed operation with up to 1 kW average power, up to 16 mJ pulse energy and a BPP of 4 mm mrad is presented. More than 10 mJ are realized in a commercial cw product-platform enabling a reliable and low cost system. The fundamental limitations of pulse energy, fluence and average power are shown and a concept for further scaling is presented.
Mode area scaling with ultra-high NA using M-type fibre for efficient high-power lasers around 2 µm
Authors: Jain Deepak , Sahu Jayanta K. , Fleming Simon
Published: October 2020

We numerically investigated LP02 mode in M-type fibres for mode-area scaling. A comparison with step-index fibres ensures up to 56% increment in mode-area with effective single mode operation for ultra-high NAs (~0.30) M-type fibres.
Mid-infrared supercontinuum generation seeded by geometrical parametric instabilities amplified in TDFA
Authors: Granger Geoffroy , Leventoux Yann , Tonello Alessandro , Wabnitz Stefan , Couderc Vincent , Fevrier Sebastien
Published: October 2020

We demonstrate thulium-doped fiber amplification of sub-nanosecond pulses generated at 1870 nm by exploiting spatiotemporal nonlinear dynamics in graded-index multimode fibers. The microjoule pulses at 1870 nm trigger supercontinuum generation in InF3 fiber.
Highly-Tm3+ doped Hexagonal Clad Germanate Fiber and associated CPA system for 2 µm Pulsed Fiber Lasers and Amplifiers
Authors: Ben Slimen Fedia , Ren Zhengqi , Ventura Andrea , Hayashi Juliano Grigoleto , Cimek Jaroslaw , White Nicholas , Jung Yongmin , Richardson David , Poletti Francesco
Published: October 2020

We developed a high concentration (8.5* 1020 ions/cm3) Tm3+ doped germanate fiber. By core-pumping it in a Chirped Pulse Amplification (CPA) system, we produced 240fs pulses with 42 MW peak-power, a record for this glass.