bluuebunny/crossref_metadata_2025 huggingface dataset:
Dynamic Range Extension in Slope-Assisted Brillouin Optical Time-Domain Analyzers with Gain Spectrum Engineering
Authors: Feng Cheng , Bhatta Hari Datta , Davidi Roy , Lu Xin , Schneider Thomas , Tur Moshe
Published: November 2021

Gain spectrum engineering by augmenting the Brillouin gain probe with a loss one has been applied to a slope-assisted dynamic Brillouin optical time-domain analyzer. More than 70% extension of the dynamic range has been demonstrated.
Loss-Compensated Dual-Source Raman-DTS with Bismuth- and Erbium-doped Fiber Amplifiers
Authors: Kovalenko D. , Sodnomay A. , Alekseenko Z. , Shelemba I. , Lobach I. , Firstov S. , Melkumov M.
Published: November 2021

The loss-compensated Raman-DTS with two sources at 1550 and 1630 nm amplified in Erbium- and Bismuth-doped fibers is presented. The DTS has temperature/spatial resolution of 0.5C/3m within 10 minutes in 4 km of single-mode fiber.
CPDWI-assisted BOTDA for fast dynamic strain measurements
Authors: Zhou Yin , Yan Lianshan , He Haijun , Zhang Xinpu , Pan Wei , Luo Bin
Published: November 2021

We present a new co-propagating dual wave interferometer (CPDWI) to improve the achievable dynamic strain sampling rate of the Brillouin optical time domain analysis (BOTDA). A 10 kHz sampling rate is experimentally demonstrated.
Time-Domain Expansion in Phase-sensitive Optical Time Domain Reflectometry
Authors: Soriano-Amat Miguel , Durán Vicente , Martins Hugo F. , Preciado Javier , Martin-Lopez Sonia , Gonzalez-Herraez Miguel , Fernández-Ruiz María R.
Published: November 2021

We demonstrate a spectral compression technique (equivalent to a temporal expansion) that allows a simple time-domain distributed interrogation of fibers with high resolution (~2 cm in this work) and using only low-bandwidth photodetection (400 KHz).
Humidity Effect on Acrylate- and Polyimide-Coated Fibres for Distributed Sensing Applications
Authors: Neves Tiago , Magalhães Regina , Scherino Lorenzo , Martin-Lopez Sonia , Martins Hugo F. , Petagna Paolo , Thévenaz Luc
Published: November 2021

A study of the effect of humidity on acrylate- and polyimide-coated fibres is analysed over a large range of humidity and temperature (-20 °C to +50 °C) using phase-sensitive Rayleigh reflectometry.
Vector optical-chirp-chain Brillouin Optical Time-Domain Analyzer
Authors: Zhang Jingdong , Zheng Hua , Wu Haoting , Feng Danqi , Yin Guolu , Zhu Tao
Published: November 2021

We propose a polarization fading free vector OCC-BOTDA based on double carrier optical chirp chain. The Brillouin amplitude and phase are obtained simultaneously with less than 0.5 MHz BFS uncertainty over 10 km SMF.
Adaptive Peak-Tracking Algorithm for Multimode Fiber Bragg Grating in Ultrahigh Temperature
Authors: Laarossi I. , Roldán-Varona P. , Quintela-Incera M.A. , Rodŕıguez-Cobo L. , López-Higuera J. M.
Published: November 2021

Development of a new adaptive algorithm for wavelength Bragg tracking in multimode fibers. I t o ffers o utstanding r esults f or d etection i n u ltrahigh temperatures (850
◦
C), with a computation speed significantly higher than conventional algorithms.
Frequency scanning interrogators and non-uniform sampling
Authors: Bhatta Hari Datta , Davidi Roy , Tur Moshe
Published: November 2021

Several dynamic fiber-optic interrogators are using frequency scanning to record dynamic scenarios. Most such interrogators sample their measurand on a non-uniform time grid. Here we discuss the resulting possible harmonic distortion and its minimization.
All-fiber photoacoustic computed tomography for three- dimensional high-resolution imaging of small animals
Authors: Bai Xue , Ma Jun , Guan Bai-Ou
Published: November 2021

All-fiber photoacoustic computed tomography (PACT) was demonstrated for three- dimensional high-resolution imaging of rat abdominal subcutaneous vasculatures, with the elevational resolution~ 3 times better than previously reported value.
First Field Trial of Monitoring Vehicle Traffic on Multiple Routes by Using Photonic Switch and Distributed Fiber Optics Sensing System on Standard Telecom Networks
Authors: Wellbrock Glenn A , Xia Tiejun J , Huang Ming-Fang , Salemi Milad , Chen Yuheng , Ji Philip , Wang Ting , Aono Yoshiaki
Published: November 2021

We demonstrated for the first time that motor vehicle traffic and road capacity on multiple fiber routes can be monitored by using a distributed-fiber-optics-sensing system with a photonic switch on in-service telecom fiber cables.
An innovative extrinsic fiber optic sensor for real-time radiation monitoring
Authors: Fienga Francesco , Casolaro Pierluigi , Vaiano Patrizio , Di Capua Francesco , Campajola Luigi , Breglio Giovanni , Cutolo Antonello , Consales Marco , Buontempo Salvatore , Cusano Andrea
Published: November 2021

Radiochromic film dosimetry is a well-established technique particularly suitable for off-line dose measurements. We propose an innovative method for the determination of the dose in real-time with radiochromic films based on optoelectronic instrumentation.
Helical-core fiber SPR sensor with a double-layer deposition
Authors: Deng Hongchang , Wang Xianbin , Jiang Xiaowen , Deng Shijie , Teng Chuanxin , Yuan Libo
Published: November 2021

We present a novel and flexible helical-core fiber (HCF) SPR sensor with a double- layer deposition, which is fabricated by twisting an eccentric core fiber. By using the proposed MEP method, we obtain the RI sensing results of the HCF SPR sensor. Our results demonstrate that the resonance wavelength of HCF SPR sensor can be linearly controlled by changing the thickness of the high RI layer. Those characteristics enable the fabrication of sensor arrays in one helical single-core or multi-core fiber with several different twisting pitches for multi-parameter measurement.
Humidity Sensor Based on Twin-Core Fiber Coated By Graphene-Oxide
Authors: Chu Rang , Bo Yutao , Liu Jing , Shi Jinhui , Guan Chunying , Yuan Libo
Published: November 2021

A high-sensitive graphene-oxide (GO) humidity sensor based on a side-polished twin- core fiber (SPTCF) Michelson interferometer (MI) has been demonstrated. The MI was fabricated by splicing a section of TCF to a standard single mode fiber (SMF) and tapering the splicing point. The GO-SPTCFMI can operate in the wavelength- and intensity- modulated sensor. The super- high humidity sensitivities of ~2.72 nm/RH% in the RH range of 40-75% and ~3.76 dB/RH% in the RH range of 60-62.1% are obtained experimentally.
Frequency Chirped Pulse-Based Methane Sensing with Inter-Pulse Calibration
Authors: Shi Guannan , Homa Daniel , Su Xu , Pickrell Gary , Wang Anbo , Zhu Yizheng
Published: November 2021

A chirped pulse-based gas sensing technique was developed. With a short, 11.2 ns frequency chirped pulse generating differential absorption within the pulse duration, inter- pulse calibrated methane sensing up to 20.5% was demonstrated.
FOG-based Bridge Damage Detection through Deep CNN
Authors: Li Sheng , Yang Yan , Yue Lina , Hu Wenbin , Liu Fang , Gan Weibing , Wang Lixin
Published: November 2021

Deep learning is an effective way to deal with classification problems. This paper reported a deep-learning algorithm used for bridge damage detection. The continuous bridge deflection based on the fiber optic sensing technology was selected to establish the datasets for supervised learning. With a scale-down bridge model, three damage scenarios and an intact state were simulated. A supervised learning model based on the deep convolutional neural networks (CNN) was proposed. After the training under ten-fold cross-validation, the model accuracy can reach to 96.9% for damage classification. By comparison with other four machine learning methods, the proposed model demonstrated its decent abilities in extracting damage features and distinguishing damage from symmetrical locations.
FBG sensors for temperature measurements in microwave irradiated breast phantoms.
Authors: Mendivelso Nicolas Ospina , Cano C. Camilo , Coronel-Rico Juan , Guarnizo Hector Fabian , Duran Margarita Varón
Published: November 2021

The validation and construction of a setup for the measurement of changes in temperature product of the exposition of biological tissue substitute material (phantom) to microwave radiation is presented, in this were used optical Fiber Bragg Gratings FBGs sensors to validate the hypotesis that their presence in the phantom does not disturb the electromagnetic fields a nd f or t hat r eason t hey a re s uitable t o p erform m easurements of temperature in real time. This is a key factor in hyperthermia treatments were many of its benefits d epends i n a c ritical way o n t he a bility t o m easure h igh t emperatures specially when the heating is carried out via irradiation of microwave energy. From these results a linear relation between the temperature reached and the irradiation time is obtained. This is a good departure point to consider other factors in the irradiation instruments that ensure temperature changes that are not harmful to the human body.
Temperature Correction in Ammonia Gas Monitoring Based on Optimized UV-DOAS Algorithm
Authors: Li Yang , Shi Yuan , Huang Yi , Dong Yanhua , Zhang Xiaobei , Deng Chuanlu , Hu Chengyong , Wang Tingyun
Published: November 2021

An optimized algorithm of differential optical absorption spectroscopy based on genetic algorithm is developed to accurately detect ammonia, the maximum error is 4.29%. The results are corrected effectively with the temperature correction coefficients at 298-318K.
Design a Monitoring System For Pathogen Detection Using Microfluidic Technology
Authors: Kerrouche Abdelfateh , Lithgow Jordan , Alwis Lourdes
Published: November 2021

Waterborne pathogens affect all waters globally and proceed to be a ongoing concern. The act to provide clean water by filtration is effective although has concerns. Previous methods for detection and removal of pathogens consist of a high test time, a high sample consumption, very expensive and require specialist operators. This paper investigates the design of an active microfluidic technology to prototype a smart monitoring system to detect waterborne pathogen movement. Results provide areas of opportunities to fabricate microchannels with a high recovery rate (88%) to embedded sensors e.g. optical fiber sensors to detect pathogens at certain flow rates. Major advantages defeat drawbacks by reducing test time and sample consumption whilst being less expensive.
Realization of a strain insensitive Fiber Bragg Grating temperature sensor using femtosecond laser micromachining
Authors: Roussel N. , Laffont G. , Cotillard R. , Bouwmans G. , Douay M. , Baque M.
Published: November 2021

We present a new intrinsically strain-insensitive Fiber Bragg Grating sensor. Using a femtosecond laser-micromachining process on a custom optical fiber, we demonstrate a 50-times strain sensitivity reduction while maintaining the temperature sensitivity.
Record Drift Performance in a Hollow-Core Resonator Fiber Optic Gyroscope Using Anti-Resonant Fiber
Authors: Sanders Glen A. , Taranta Austin , Narayanan Chellappan , Fokoua Eric Numkam , Mousavi Seyedmohammad Abokhamis , Strandjord Lee K. , Smiciklas Marc , Bradley Thomas D. , Hayes John , Jasion Gregory T. , Qiu Tiequn , Williams Wes , Poletti Francesco , Payne David N.
Published: November 2021

Resonator Fiber Gyroscope (RFOG) performance has hitherto been limited by non- linearity, modal impurity, and backscattering in sensing fibers. By employing high-performance anti-resonant fiber, we show dramatically improved long-term stability (>500x) over prior hollow- core fiber RFOGs.
Ultrasensitive photothermal gas sensor with a dual-mode anti-resonant hollow-core fiber
Authors: Zhao Pengcheng , Zhao Yan , Bao Haihong , Ho Hoi Lut , Jin Wei , Fan Shangchun , Gao Shoufei , Wang Yingying , Wang Pu
Published: November 2021

We report mode-phase-difference photothermal spectroscopy with a dual-mode anti-resonant hollow-core fiber. Ultra-sensitive gas detection down to ppt level is demonstrated with good stability and unprecedented dynamic range of over 7 orders of magnitude.
A Miniature U-shaped Fiber Refractive-index Sensor with High Sensitivity in Air
Authors: Wang Chao , Shi Yongjie , Jin Wei , Jiang Shoulin , Wang Junhua
Published: November 2021

We report a U-shaped optical fiber refractive-index (RI) sensor with a sensitive region < 1 mm and a RI sensitivity of 3.8x103 nm/RIU in air environment. This sensors is made by arc-discharge tapering of common single mode fiber.
Ultrahigh resolution fiber-optic thermometer by using an ultrastable probe laser
Authors: Zhao Shuangxiang , Liu Qingwen , He Zuyuan
Published: November 2021

A fiber laser is stabilized against an optical ultrastable cavity, and then is used for temperature measurement. A resolution of 0.1 micro-Kelvin is realized, which is at least 100 times better than current fiber-optic thermometers.
Experimental study on PDMS-assembled microbottle resonator for temperature sensing
Authors: Zhu Naisi , Zhang Ya-nan , Sun Yang , Li Xuegang , Zhao Yong
Published: November 2021

A polydimethylsiloxane (PDMS)-assembled microbottle resonator based temperature sensor with a high sensitivity of -261.19 pm/°C was demonstrated. Compared with silica microbottle resonator, the proposed temperature sensor is simple in fabricate and high in sensitivity.
Comparison of FBG and Interferometric Surface Mounted Optical Fibre Pressure Sensor
Authors: Aime Laura F J , Kissinger Thomas , James Stephen W , Tatam Ralph P
Published: November 2021

High sensitivity pressure measurements are reported using two intrinsic optical fibre methods: Fibre Bragg Gratings and Fibre Segment Interferometry. The optical fibres sensors are surface mounted onto a composite membrane and respective sensitivities of 79.2 µɛ/kPa and 65.8 µɛ/kPa have been achieved at resolutions of 0.79 µɛ and 0.04 µɛ.
Characterization of UV light sensors using Brillouin optical correlation domain analysis
Authors: Hong Jun Gi , Ahn Tae-Jung , Song Kwang Yong
Published: November 2021

Azobenzene polymer based distributed ultraviolet sensor is characterized by Brillouin optical correlation domain analysis. Three types of UV sensor probes are made by coating the azobenzene polymer on bare fiber, acylated coated fiber and polyimide coated fiber. Brillouin frequency response by the UV exposure of each probe sensors are presented.
Fiber Laser Sensor Detection of Acoustic Emissions from Stress Corrosion Cracking in Aluminum
Authors: Williams Caitlin R. S. , Hart Joseph D. , Hutchinson Meredith N. , Cranch Geoffrey A.
Published: November 2021

We demonstrate a fiber laser sensor used to detect acoustic emissions generated by stress corrosion cracking in sensitized aluminum. Several performance metrics closely match those of industry standard piezo-electric sensors.
Design and Testing of a Rugged FBG Array Deformation Sensor for Power Transformers Applications
Authors: de Araujo Artur , Peres Rodrigo , Rosolem Joao Batista , de Melo Aguinaldo Goes , Benetti Daniel
Published: November 2021

In this work a rugged FBG array deformation sensor was evaluated. The sensor was developed to monitor the mechanical forces in power transformers windings during events such as short-circuit and inrush current.
A new approach to Optical Fiber Sensors: Plane-by-Plane FBGs inscribed using Femtosecond Laser and a Slit
Authors: Roldán-Varona Pablo , Pallarés-Aldeiturriaga David , Rodríguez-Cobo Luis , López-Higuera José Miguel
Published: November 2021

Development of enhanced Pl-b-Pl FBGs using slit beam technique with fem-tosecond laser, with improved control of the width and depth of the induced planes. Spectral response and homogeneity of induced change are far superior to PbP FBGs.
Boosting the data processing speed by artificial neural network in distributed fiber-optic sensor
Authors: wang Yifan , Liu Qingwen , Li Biaozhi , Chen Dian , Li He , He Zuyuan
Published: November 2021

The traditional corss-correlation algorithm is replaced by artificial neural network (ANN) in distributed fiber-optic sensor, and the data processing speed is boosted by 450 times with the nearly same SNR.
Fast demodulation of fiber sensor measurements using Buneman frequency estimation
Authors: Yang Yang , Wang Mohan , Zhao Kehao , Zhu Chengqi , Chen Kevin P.
Published: November 2021

A fast demodulation algorithm for Intrinsic Fabry-Perot interferometry (IFPI) based on Buneman frequency estimation is proposed. It can achieve 4-kHz cavity length demodulation rate with 0.034 nm absolute cavity length demodulation resolution.
Machine learning to enhance the calculation of optical forces in the geometrical optics approximation
Authors: Ciriza David Bronte , Magazzù Alessandro , Callegari Agnese , Iatì Maria A. , Volpe Giovanni , Maragò Onofrio M.
Published: November 2021

We show how machine learning can improve the speed and accuracy of the optical force calculations in the geometrical optics approximation.
Combining light sheet microscopy and optical tweezers for simultaneous micromanipulation and 3D visualization
Authors: Zieger Viktoria , Betz Timo , Vos Bart E.
Published: November 2021

To investigate the relation between structural and local mechanical properties in biological tissues, we develop a light sheet microscope combined with optical tweezers for in vivo imaging and microrheology.
Reconfigurable Plasmonic Particles-on-Film using Thermo-Osmotic Flows
Authors: Fränzl M. , Cichos F.
Published: November 2021

The manipulation of plasmonic nanoparticles offers the possibility to dynamically control light–matter interactions at the nanoscale and is of interest for applications in nanophotonics, plasmon-enhanced spectroscopy and material science. Here, we present a reconfigurable plasmonic particle-on-film controlled by thermo-osmotic interface flows in electrolyte solutions.
Machined Multicore Fibre Tweezers for Single Cell Manipulation
Authors: Anastasiadi Georgia , Shaw Fyntan M. , Matheson Andrew B. , Mendonca Tania , MacPherson Willian N. , Wright Amanda J. , Dalgarno Paul A. , Tassieri Manlio , Paterson Lynn
Published: November 2021

A high numerical aperture tweezing system, based on micro-machined multicore optical fibres is described, along with single cell trapping applications and a discussion about the trap shape and strength. © 2021 The Author(s)
FORMA and BEFORE: expanding applications of optical tweezers
Authors: García Laura Pérez , Selin Martin , Arzola Alejandro V. , Volpe Giorgio , Magazzù Alessandro , Castillo Isaac Pérez , Volpe Giovanni
Published: November 2021

We introduce two methods based on statistical inference to calibrate optical tweezers. Both outperform well-established methods and cover a broader application field, including non-conservative force fields and out of equilibrium systems.
“On the fly” evaluation of upconversion nanoparticle power dependence from individual stochastic trajectories
Authors: Cavalcante Isabela N. , Marchi M. Claudia , Sigoli Fernando A. , de Sousa Filho Paulo C. , Barja Beatriz C. , Nome René A.
Published: November 2021

Integrated optical trapping, stochastic dynamics and light-matter interactions experiments and simulations are used to evaluate the power dependence of single co-doped Yb:Er upconversion nanoparticles starting from their individual trajectories.
In Vivo Labeling and Enumeration of Circulating Tumor Cells with a Folate-Receptor Targeted Molecular Probe
Authors: Pace Joshua , Ivich Fernando , Patil Roshani A. , Madduri Srinivasarao , Amiji Mansoor M. , Low Philip S. , Niedre Mark
Published: November 2021

We used a folate-receptor targeted fluorescent molecular probe to label circulating tumor cells directly in the bloodstream in mouse metastasis models. We used a new diffuse light-based optical instrument to non-invasively detect and count them.
Usage of fiber optics as an underground deployable radon gas detector
Authors: Rodal Yehuda , Shemer Amir , Schwarz Ariel , Ozana Nisan , Zafrir Hovav , Zalevsky Zeev
Published: November 2021

Radon gas was previously presented to be a good tool as a proxy for pre-seismic precursory before earthquakes, especially when the detector is deployed a few meters underground in regions of high seismic activity. In this paper, we present a fiber optic-based detector that can be deployed underground and assist in the measurement of radon gas temporal concentration variations. The sensitivity of the fiber-based sensor is enhanced due to Fabry-Perot resonator realized within the fiber. The sensing principle is related to the impact of the alpha particles released from the surrounding radon gas on the optical transmission parameters of the fiber. By incorporation of WDM filters along the fiber sensor, the dispersion of the radon's radiation damage along the deployed fiber can be allocated.
Testing a 2 kHz adaptive optical system by using laboratory turbulence
Authors: Rukosuev A. L. , Belousov V.N. , Nikitin A.N. , Sheldakova Yu.V. , Kudryashov A.V.
Published: November 2021

The spectral characteristics of laboratory turbulence obtained from the Shack-Hartmann wavefront sensor focal spot coordinates dynamics are presented. The limits of applicability of a fast adaptive optical system in a real atmosphere are determined.
Wavefront Reconstruction for Noisy Shack-Hartmann Wavefront Sensors using Deep Learning
Authors: Dave Harshil , DuBose Theodore B. , Watnik Abbie T.
Published: November 2021

A deep learning network for wavefront reconstruction based on intensity and slopes information (ISNet) is further improved by using realistic noise to generate a con- volutional neural net model for accurate centroiding and slopes calculation.
Daytime Reduction in Near-Surface Optical Turbulence due to Black Carbon Aerosols
Authors: Anand N. , Sunilkumar K. , Satheesh S. K. , Moorthy K. Krishna
Published: November 2021

We present how black carbon aerosols can reduce near-surface optical turbulence by absorption of solar radiation. This reduction is observed to be prominent during noontime when surface-reaching solar radiation is maximum.
Short-exposure image resolution: Tilt definition study
Authors: Zhan Hanyu , Wijerathna Erandi , Voelz David , Muschinski Andreas
Published: November 2021

The resolution of short-exposure imaging through turbulence is studied with simulation for two phase tilt definitions, Z-tilt and G-tilt, which are applied to remove the instantaneous aperture averaged tilt in a short exposure. Applying the Z-tilt definition provides results that are consistent with Fried’s short-exposure theory. Applying the G-tilt definition produces narrower point spread functions that can deviate significantly from far-field theory.
Laser Beam Propagation Experiments in Indoor and Outdoor Environments
Authors: Baci Nurdan Anılmış , Kaya Elif Türkan Akşit , Demirci Erkan , Doğan Mustafa
Published: November 2021

In this paper, atmospheric effects on a 1.070 µm wavelength laser beam have been investigated by measuring power-in-the-bucket and beam profile on a horizontal path with different lengths. Simulations of atmosphere and laser beam interactions matching with the experimental conditions are carried out to make a comparison.
Nonlinear optics for radiative heat control
Authors: Khandekar Chinmay , Rodriguez Alejandro
Published: November 2021

We show that nonlinear optics can enable unique fundamental and practical functionalities in thermal science by summarizing our recent findings published in a series of works. Our work connects the field of nonlinear optics and the field of thermal radiation. (e-mail: ckhandek@stanford.edu).
Highly fluorescent thin films formation by water-enhanced colloidal perovskite nanoparticles
Authors: Salinas Yolanda , Leeb Elisabeth , Mayr Felix , Brüggemann Oliver , Sariciftci Niyazi Serdar , Scharber Markus Clark
Published: November 2021

Using water as an additive, high photoluminescence quantum yields were obtained from methylammonium and formamidinium lead bromide nanoparticles, which formed thin solid films with extraordinary fluorescence and stability under ambient conditions.
Colloidal Core/Shell Quantum Dot Nanostructures for Photon Upconversion
Authors: Welsch Tory A. , Cleveland Jill M. , Chase D. Bruce , Doty Matthew F.
Published: November 2021

We synthesize CdTe/CdS/CdSe core/shell/shell QDs as a tunable spherical platform for high quality upconversion materials. We characterize the QDs via TEM and PL to show fine control over the resulting structures and their optical properties.
Nearly-hyperuniform anti-reflection coatings made from high-index nanodisks for silicon heterojunction solar cells
Authors: Piechulla Peter M. , Slivina Evgeniia , Bätzner Derk , Fernandez-Corbaton Ivan , Wehrspohn Ralf B. , Sprafke Alexander N. , Rockstuhl Carsten
Published: November 2021

A broadband nanodisk-based anti-reflection coating is experimentally shown to increase the short circuit current of industrial type solar cells with several square centimeter area by 5.1 % compared to an optimized flat coating.
Light Management Foils with Hierarchical Textures for Light Outcoupling in OLEDs
Authors: Kovačič Milan , Bouchard Felix , Soldera Marcos , Lasagni Andrés Fabián , Samigullina Dinara , Krč Janez , Lenk Simone , Lipovšek Benjamin , Reineke Sebastian , Topič Marko
Published: November 2021

Hierarchical textures are researched experimentally and by optical simulations in the role of external outcoupling solution for OLEDs. Their full outcoupling potential, limiting factors and pathways for further increase in outcoupling are addressed.
Free-Space Luminescent Solar Concentrators: analytical performance model and experiments
Authors: Heres Geert , Einhaus Lisanne , Saive Rebecca
Published: November 2021

We present free-space luminescent solar concentrators (LSCs), analytical performance calculations, and experiments. This will enable concentrating diffused light onto commercial solar modules mitigating performance challenges of conventional LSCs.
LWIR-THz Double Resonance Spectroscopy for Remote Identification of Trace Gases
Authors: Reyes Danielle , Schneiderman Max , Thul Daniel , Bernath Robert , Richardson Martin , Everitt Henry
Published: November 2021

In preparation for remote atmospheric detection, preliminary double resonance spectroscopic measurements were made of CH3Cl and CH3F using a LWIR pump to excite transient vibrational states and a THz source to probe the rotational levels.
Bimodal Interferometric Photonic Sensors Based On Periodic Configurations
Authors: García-Rupérez J. , Torrijos-Morán L.
Published: November 2021

The combination of bimodal interferometric configurations with periodic photonic structures as subwavelength grating (SWG) waveguides and photonic crystals (PhCs) allows developing novel sensing configurations with increased sensitivity and reduced footprint.
Investigation on TiOx/Ti/TiOx tri-layer film for integrated optical gas sensing applications
Authors: Shim Joonsup , Lim Jinha , Kim SangHyeon
Published: November 2021

We systematically investigated the electrical characteristics of TiOx/Ti/TiOx tri-layer film for optical gas sensors on Ge-on-insulator platform. It was found that noise-equivalent- temperature-difference, which is strongly associated with limit-of-detection of gas sensors, could reach 14.56 mK.
Optimization of the Fringe Contrast of an Interference Pattern of a Mach-Zehnder Interferometer and Its Use as a Curvature Sensor
Authors: Marrujo-García S. , Hernández-Romano I. , May-Arrioja D. A. , Cuando-Espitia N. , Torres-Cisneros M. , Minkovich Vladimir P. , Monzon-Hernández D.
Published: November 2021

A Mach-Zehnder curvature sensor with enhanced contrast based on lateral-offset splicing is proposed. The highest contrast was obtained at 2 µm lateral-offset. Using the Fourier Transform, amplitude changes were traced from 0 m-1 to 2.68 m-1.
Spectral Laser Induced Fluorescence for standoff detection and classification of aerosolized biological threats
Authors: Buteau Sylvie
Published: November 2021

Adding Laser Induced Fluorescence to cloud mapping can provide early warning of aerosolized biological threats. Although the sensor is the heart of the solution, various other aspects must also be optimized to reach optimum impact.
Underwater seismic tomography with unprecedented resolution using fiber optics
Authors: Gonzalez-Herraez Miguel , Fernandez-Ruiz Maria R. , Magalhaes Regina , Costa Luis , Martins Hugo F. , Becerril Carlos , Martin-Lopez Sonia , Williams Ethan , Zhan Zhongwen , Vantilho Roel , Ugalde Arantza , Villaseñor Antonio , Ranero Cesar
Published: November 2021

Distributed acoustic sensing (DAS) using existing underwater optical fiber cables may provide a new way of mapping the deep Earth's interior in these scenarios. It can also lead to a better understanding of infragravity waves.
Strain Mapping with THz Metamaterial Composites
Authors: Khatib Omar , Tyler Talmage , Padilla Willie J. , Jokerst Nan M. , Everitt Henry O.
Published: November 2021

Terahertz metamaterials that exhibit broad spectral resonances are used to probe local strain fields. By choosing specific frequencies and polarizations for measurement, it is possible to obtain unique spatial maps for different strain states.
Plasmonic Metasurfaces with Ultra-High-Q (≈2400) Lattice Resonances for Sensing, LiDAR Nanolasing and Imaging
Authors: Bin-Alam M. Saad , Reshef Orad , Mamchur Yaryna , Alam M. Zahirul , Carlow Graham , Upham Jeremy , Sullivan Brian T. , Ménard Jean-Michel , Huttunen Mikko J. , Boyd Robert W. , Dolgaleva Ksenia
Published: November 2021

We experimentally demonstrate an ultra-high Q-factor (≈2400) surface lattice resonance in a plasmonic metasurface, a promising platform for highly-efficient biosensors, LiDAR nanolasers, and imaging metalenses.
Optical Trapping Using Copper Nanotweezers
Authors: Xu Zhe , Li Chen , Li Ruyang , Zhao Yaqian , Li Rengang
Published: November 2021

We demonstrate the optical trapping of single dielectric nanoparticles in a microfluidic chamber using a coupled T-shaped copper plasmonic nanoantenna for studying light–matter interactions. We present numerical simulations of the optical force, near-field distribution, and temperature rise.
Computational Optimization of Gold Nanorods Size for Single-molecule Plasmonic Sensing
Authors: Staniszewska Teresa , Szkulmowski Maciej , Morawiec Seweryn
Published: November 2021

The optimum size of gold nanorods for single-molecule plasmonic sensing in scattering and absorption modalities is determined by computing ratio of measurable signal to the inherent measurement noise (contrast-to-noise ratio) as a prime figure-of-merit.
Strain Vector Detection Using a Combination of a Birefringence-Controlled Terpolymer Optical Fiber and a Dichroic Dye Dopant
Authors: Furukawa Rei , Yamazaki Hayato , Sode Shingo , Uzawa Keigo , Yano Kentaro
Published: November 2021

Terpolymer of methyl methacrylate, 2,2,2-trifluoroethyl methacrylate, and benzyl methacrylate, that is known to eliminate intrinsic and photoelastic birefringence simultaneously, was adopted to compose a core of a multimode fiber. Polarization-maintaining property of this terpolymer-based fiber was characterized using mode-dependent extinction-ratio measurement and polarization-dependent near-field pattern. Unlike any conventional fiber-optic strain sensors, this terpolymer-based fiber was demonstrated for its capability in detecting strain vector in a use with a dichroic dye.
High performance distributed acoustic sensing using dechirp processing
Authors: Xiong Ji , Wang Zinan , Jiang Jialin , Han Bing , Rao Yunjiang
Published: November 2021

We reported a novel distributed acoustic sensing system based on dechirp pro- cessing, in which large bandwidth Rayleigh scattering information was acquired, achieving 28.4 cm spatial resolution and 60 µε measurable range.
Fiber Bragg gratings application for monitoring curing process between layers of multidirectional carbon fiber reinforced polymer cured by oven and microwave radiation
Authors: Maldonado-Hurtado Daniel , Madrigal Javier , Ruiz Rocío , Roig Inmaculada , Sales Salvador
Published: November 2021

We embedded optical sensors based on fiber Bragg gratings between each layer of a multidirectional carbon fiber reinforced polymer for monitoring temperature and strain distribution over curing process using both, thermal and microwave heating method.
On-chip generation and characterization of densely-spaced time-bin entangled qubits
Authors: Yu Hao , Chemnitz Mario , Sciara Stefania , Fischer Bennet , Crockett Benjamin , Roztocki Piotr , Little Brent E. , Chu Sai T. , Moss David J. , Azaña José , Wang Zhiming , Morandotti Roberto
Published: November 2021

By using an on-chip unbalanced interferometer for densely-spaced time-bin state preparation/processing and a spiral waveguide for photon-pair generation, we demonstrate and implement high-quality densely-spaced time-entangled two-photon qubits.
Fourier Optical Convolutional Neural Network Accelerator
Authors: Miscuglio Mario , Hu Zibo , Li Shurui , Gupta Puneet , Dalir Hamed , Sorger Volker J.
Published: November 2021

Here we report a massively-parallel Fourier-optics convolutional processor accelerated 160x over spatial-light-modulators using digital-mirror-display technology as input and kernel showing an MNIST and CIFAR-10 accuracy of 96% and 54%, respectively.
Real-time, Software-defined, GPU-Based Optical Receiver
Authors: van der Heide Sjoerd , Luis Ruben S. , Puttnam Benjamin J. , Rademacher Georg , Koonen Ton , Shinada Satoshi , Awaji Yohinari , Furukawa Hideaki , Okonkwo Chigo
Published: November 2021

By exploiting an off-the-shelf GPU, real-time digital signal processing for intensity-modulated directly-detected PAM-N formats and Kramers-Kronig coherent QAM-N formats is performed. We demonstrate transmission over 91 km of field-deployed fiber and a 10,000 km straight-line link.
Multi-Format Carrier Phase Recovery Using a Programmable Circuit
Authors: Börjeson Erik , Larsson-Edefors Per
Published: November 2021

We introduce an application-specific circuit that can be programmed to ef- ficiently perform blind carrier phase recovery for different modulation formats. A circuit implementation that supports QPSK/16/32/64QAM is evaluated.
Influence of the Gain Switching on the Self-Injection Locking of a Laser Diode
Authors: Shitikov Artem E. , Kondratiev Nikita M. , Lobanov Valery E. , Bilenko Igor A.
Published: November 2021

We implemented the technique of self-injection locking of a laser diode to a high-quality-factor microresonator to a gain-switched laser diode. It led to narrowing of each line in a gain-switched comb for the wide range of modulation frequencies.
Test-retest reproducibility of in vivo oscillating gradient and microscopic anisotropy diffusion MRI in mice at 9.4 Tesla
Authors: Rahman Naila , Xu Kathy , Omer Mohammad , Budde Matthew D. , Brown Arthur , Baron Corey A.
Published: November 2021

Background and purpose

Microstructure imaging with advanced diffusion MRI (dMRI) techniques have shown increased sensitivity and specificity to microstructural changes in various disease and injury models. Oscillating gradient spin echo (OGSE) dMRI, implemented by varying the oscillating gradient frequency, and microscopic anisotropy (μA) dMRI, implemented via tensor valued diffusion encoding, may provide additional insight by increasing sensitivity to smaller spatial scales and disentangling fiber orientation dispersion from true microstructural changes, respectively. The aims of this study were to characterize the test-retest reproducibility of in vivo OGSE and μA dMRI metrics in the mouse brain at 9.4 Tesla and provide estimates of required sample sizes for future investigations.

Methods

Twelve adult C57Bl/6 mice were scanned twice (5 days apart). Each imaging session consisted of multifrequency OGSE and μA dMRI protocols. Metrics investigated included μA, linear diffusion kurtosis, isotropic diffusion kurtosis, and the diffusion dispersion rate (Λ), which explores the power-law frequency dependence of mean diffusivity. The dMRI metric maps were analyzed with mean region-of-interest (ROI) and whole brain voxel-wise analysis. Bland-Altman plots and coefficients of variation (CV) were used to assess the reproducibility of OGSE and μA metrics. Furthermore, we estimated sample sizes required to detect a variety of effect sizes.

Results

Bland-Altman plots showed negligible biases between test and retest sessions. ROI-based CVs revealed high reproducibility for most metrics (CVs < 15%). Voxel-wise CV maps revealed high reproducibility for μA (CVs ~ 10%), but low reproducibility for OGSE metrics (CVs ~ 50%).

Conclusion

Most of the μA dMRI metrics are reproducible in both ROI-based and voxel-wise analysis, while the OGSE dMRI metrics are only reproducible in ROI-based analysis. Given feasible sample sizes (10–15), μA metrics and OGSE metrics may provide sensitivity to subtle microstructural changes (4–8%) and moderate changes (> 6%), respectively.
Impact of emergency physician-staffed ambulances on preoperative time course and survival among injured patients requiring emergency surgery or transarterial embolization: A retrospective cohort study at a community emergency department in Japan
Authors: Ono Yuko , Iwasaki Yudai , Hirano Takaki , Hashimoto Katsuhiko , Kakamu Takeyasu , Inoue Shigeaki , Kotani Joji , Shinohara Kazuaki
Published: November 2021

Injured patients requiring definitive intervention, such as surgery or transarterial embolization (TAE), are an extremely time-sensitive population. The effect of an emergency physician (EP) patient care delivery system in this important trauma subset remains unclear. We aimed to clarify whether the preoperative time course and mortality among injured patients differ between ambulances staffed by EPs and those staffed by emergency life-saving technicians (ELST). This was a retrospective cohort study at a community emergency department (ED) in Japan. We included all injured patients requiring emergency surgery or TAE who were transported directly from the ED to the operating room from January 2002 to December 2019. The primary exposure was dispatch of an EP-staffed ambulance to the prehospital scene. The primary outcome measures were preoperative time course including prehospital length of stay (LOS), ED LOS, and total time to definitive intervention. The other outcome of interest was in-hospital mortality. One-to-one propensity score matching was performed to compare these outcomes between the groups. Of the 1,020 eligible patients, 353 (34.6%) were transported to the ED by an EP-staffed ambulance. In the propensity score-matched analysis with 295 pairs, the EP group showed a significant increase in median prehospital LOS (71.0 min vs. 41.0 min, P < 0.001) and total time to definitive intervention (189.0 min vs. 177.0 min, P = 0.002) in comparison with the ELST group. Conversely, ED LOS was significantly shorter in the EP group than in the ELST group (120.0 min vs. 131.0 min, P = 0.043). There was no significant difference in mortality between the two groups (8.8% vs.9.8%, P = 0.671). At a community hospital in Japan, EP-staffed ambulances were found to be associated with prolonged prehospital time, delay in definitive treatment, and did not improve survival among injured patients needing definitive hemostatic procedures compared with ELST-staffed ambulances.
Impact of the sinus node recovery time after termination of atrial fibrillation during catheter ablation on clinical outcomes in patients with persistent atrial fibrillation
Authors: Watanabe Keita , Nagata Yasutoshi , Nitta Giichi , Okata Shinichiro , Nagase Masashi , Miyazaki Ryoichi , Nagamine Sho , Kaneko Masakazu , Lee Tetsumin , Nozato Toshihiro , Ashikaga Takashi , Goya Masahiko , Sasano Tetsuo
Published: November 2021

Background

Although long sinus arrest is occasionally observed during atrial fibrillation (AF) catheter ablation when the fibrillation was terminated, its meaning and prognosis have not yet been clearly elucidated. We hypothesized that sinus node recovery time (SNRT) after termination of AF (time from termination of AF to the earliest sinus node activation) could reflect the extent of atrial remodeling, influencing the formation of non-pulmonary vein (non-PV) triggers and post-ablation outcomes.

Method

The participants were 157 consecutive patients with persistent AF (male: 77.1%, age: 63.3±11.2 years) who underwent catheter ablation. We recorded SNRT after terminating AF by radiofrequency delivery or electrical cardioversion during the first ablation and evaluated the relationships between SNRT and atrial tachyarrhythmia recurrence and between SNRT and non-PV triggers after repeat ablation.

Results

Forty-five patients (28.7%) experienced recurrence of atrial tachyarrhythmias. Patients with recurrence had longer SNRTs (1738 ms vs. 1394 ms, p = 0.012). In the multivariate logistic regression analysis, only SNRT ≥2128ms was a significant independent predictor of clinical AF recurrence (hazard ratio 7.48; 95% confidence interval 2.94–19.00; P<0.001). Kaplan–Meier estimator showed that the recurrence-free rate was significantly lower if ≥ 2128ms (log-rank, p<0.001). Thirty-five patients (77.8%) underwent a second ablation. Although there was no difference in the rate of pulmonary vein reconnections (78.6% vs. 71.4%, p = 0.712), non-PV triggers were observed more frequently in the longer SNRT group (57.1% vs. 14.3%, p = 0.012).

Conclusions

Patients with a prolonged SNRT had a higher prevalence of AF recurrence after the first ablation and higher inducibility of non-PV triggers. Measuring SNRT might be used for the stratification of patients with persistent AF.
Dance and Authoritarianism: These Boots Are Made for Dancing
Authors: Shay Anthony
Published: November 2021

How dance and mass movement are used as a political tool by political regimes, especially authoritarian governments, as a way of showing symbolic mass support for the regime. Such regimes require spectacle to present them as protectors of the ethnic and national identities of their subjects, represented by the costumed folk dancers.
Writing memory: Three visual diaries related to ‘pharmacy’
Authors: Chow Stefanie Yuen King
Published: November 2021

Diaries offer a private space to play tic-tac-toe with intellectual, artistic and personal complexities, practice wielding or calling upon language, confess amorous feelings, sharpen the switchblades of resentment, and so on. Accompanied by this general outline of what a diary is for, the diaries made by contemporary Chinese artists related to COVID-19 are neither written for themselves or for their future readers. It should belong to the third category as a public diary for living contemporary people. It challenges the concept of ‘author’ both in literal and art discourse and might make the identity of the diary more and more obscure. Are these diaries still private art? Or before it was created, has it already become public art? This article will focus on visual diaries made by three contemporary Chinese artists, and study how the artists ‘write’ their own ‘memory’.
An experiment in space and time: Remaking the missing Doctor Who episode ‘Mission to the Unknown’
Authors: Braithwaite Philip
Published: November 2021

In the 1960s, the majority of Doctor Who (1963–89, 1996, 2005–present) episodes were wiped or lost. Students and staff at the University of Central Lancashire recently took on the challenge of remaking the missing Doctor Who episode ‘Mission to the Unknown’ (1965). The goal was to faithfully recreate the episode in a way that lays a claim to authenticity. This article examines the process and product and asks, with reference to television historiography, whether it achieves its goal of authenticity and what ‘authenticity’ might mean in this context. Ellis and others discuss the estrangement felt when viewing television from earlier decades. This article discusses the ‘feedback loop’ involved in knowing that the episode was made recently whilst assessing it as if it had been made in the past. The estrangement the viewer feels is therefore a sign that the episode is succeeding in its task of staying authentic to its era. But is it possible to completely abandon the knowledge of its contemporary production and lose oneself to the experience of viewing?
Who is this who is coming? From neurosis to neurodegeneration in television adaptations of M. R. James’s ‘Oh, Whistle and I’ll Come to You, My Lad’
Authors: Ray Nicholas
Published: November 2021

This article discusses two BBC television adaptations of M. R. James’s classic ghost story ‘Oh, Whistle and I’ll Come to You, My Lad’ (1904), the first directed by Jonathan Miller (1968) and the second by Andy de Emmony (2010). Arguing that de Emmony’s film takes Miller’s as a point of departure, it attempts to track the progressive ‘psychologization’ of James’s tale, a development that it explores with reference to Sarah Cardwell’s notion of ‘meta-textual’ lineage. The article outlines how Miller knowingly reimagines James’s story as a Freudian parable by drawing on the resources of classical psychoanalysis and its understanding of neurosis as the expression of a dynamic interior conflict, one in which something repressed menacingly returns. It goes on to read de Emmony’s film, which reorganizes the story around a case of dementia, as an effort to extend the tale into the psychic terrain of the ‘new wounded’, a term coined by philosopher Catherine Malabou to describe emergent psychopathologies unique to neurological injury or degeneration. Taking conceptual support from Malabou, the article demonstrates both the self-consciousness with which the later adaptation builds from its antecedent and its reinscription of the story within a frame of reference that specifically exceeds the psychoanalytic ontology presupposed by Miller. The films reimagine and contemporize the Jamesian haunting – with its climactic coming of a mysterious other – in ways that are utterly distinct but also cumulatively psychological. Looked at in apposition, the article suggests, they exemplify adaptation not simply as a revival or reconstitution of a past text but as an ongoing, intertextual and incremental labour of reinvention.
Global TV Horror, Stacey Abbott and Lorna Jowett (eds) (2021)
Authors: Young Nicola
Published: November 2021

Review of: Global TV Horror, Stacey Abbott and Lorna Jowett (eds) (2021)

Cardiff: University of Wales Press, 272 pp.,

ISBN 978-1-78683-694-6, p/bk, £45
The Two cines con niño: Genre and the Child Protagonist in Over Fifty Years of Spanish Film (1955–2010), Erin Hogan (2018)
Authors: Beaney Rachel
Published: November 2021

Review of: The Two cines con niño: Genre and the Child Protagonist in Over Fifty Years of Spanish Film (1955–2010), Erin Hogan (2018)

Edinburgh: Edinburgh University Press, 236 pp.,

ISBN 978-1-47443-611-3, h/bk, £75.00 and p/bk, £19.99
Un quart de segle d'estudis catalans a la Universitat de Szeged
Authors: Berta Tibor
Published: November 2021

L’objectiu d’aquest treball és presentar la història i els resultats dels estudis catalans a la Universitat de Szeged per commemorar els vint-i-cinc anys de la seva existència. Es detallen les circumstàncies de la seva creació dins el Departament d’Estudis Hispànics de la mateixa universitat. Es presenta l’evolució de les seves activitats docents, científiques i culturals, que mostren els esforços d’aquest centre universitari per difondre l’interès pels estudis catalans a Hongria.
Pere Calders en hongarès: Antaviana – contes fantàstics de la terra i del més enllà
Authors: Bakucz Dóra
Published: November 2021

En la col·lecció Biblioteca Catalana de l’Editorial L’Harmattan al 2021 es publicarà una antologia de Pere Calders compilada expressament per a aquesta edició. L’article és una presentació de l’autor català als lectors hongaresos: després de la descripció general de l’obra de l’escriptor i l’explicació del títol del llibre, es parla de la seva possible comparació amb l’hongarès István Örkény i es presenta una aproximació a l’estil de Calders segons les categories amb les quals es caracteritzen els seus textos en la crítica literària.erària.