bluuebunny/crossref_metadata_2025 huggingface dataset:
Rupture of the extensor digitorum communis tendon in extensor zone V due to plant thorn injuries: a report of two cases
Authors: Jang Min Gu , Heo Youn Moo , Shin Woo Jin
Published: November 2022

Penetrating injuries due to a plant thorn in the hand may occur during outdoor activities. We experienced two patients with rupture of the extensor digitorum communis (EDC) tendon in extensor zone V caused by plant thorn injuries. Both patients, presenting with pain and swelling around the third metacarpophalangeal joint, had a history of penetrating injuries due to plant thorns. The injuries had been ineffectively treated with oral antibiotics. Plain radiographs showed soft tissue swelling without a foreign body and bony lesions. Enhanced magnetic resonance imaging confirmed a rupture of the EDC tendon at the third extensor zone V. Tendon ruptures were diagnosed 27 and 60 days after injury, respectively. A plant thorn injury in the hand can cause persistent synovitis around the tendon, and as a result, progress to tendon rupture. A magnetic resonance imaging examination may be helpful if symptoms do not improve for a prolonged period after plant thorn injury.
Manual de estudios arquitectura. Escuela Técnica Superior de Arquitectura
Authors: Algarín Comino Mario José , Mercader Moyano Pilar
Published: November 2022

Esta guía, centrada en la formación actual del arquitecto, nos ofrece un análisis detallado de la Escuela Técnica Superior de Arquitectura de la Universidad de Sevilla. De esta manera, además de su estructura y organización interna, se analizan las transformaciones que ha experimentado el centro en distintos ámbitos desde su creación en 1960; los textos se ilustran con imágenes que dan cuenta de los espacios y equipamientos. Se hace hincapié en la proyección internacional de las titulaciones y en la oferta formativa de prácticas en empresas. Asimismo, se detalla la oferta de grados y másteres, así como las líneas de investigación y las salidas profesionales. Se trata, pues, de una obra de carácter divulgativo encaminada a impulsar los estudios arquitectónicos y a acercar la titulación tanto a estudiantes preuniversitarios, que deseen una primera aproximación al centro, como a egresados interesados en ampliar su formación en posgrado y en conocer la situación laboral. Con este objetivo, el manual propuesto, en el que se recogen experiencias de antiguos alumnos, incluye información y enlaces extraídos de la memoria de verificación del plan de estudios, programas docentes de diferentes asignaturas y webs de interés facilitadas por los departamentos.
Production of Polyhydroxybutyrate (PHB) by Novel Bacillus megaterium SWU01 Isolated from Activated Sludge
Authors:   Department of Chemistry, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung Road, Bangkok 10520, Thailand, Chuavong Wisan , Ponprateep Sirikwan ,   Department of Chemistry, Faculty of Science, Srinakharinwirot University, 114 Sukumvit 23 Road, Bangkok 10110, Thailand, Ajawatanawong Pravech ,   Department of Microbiology, Faculty of Science, Mahidol University, 272 Rama VI, Rachathewi, Bangkok, 10400, Thailand, Vatanavicharn Tipachai ,   Department of Biology, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung Road, Bangkok 10520, Thailand
Published: November 2022

Polyhydroxybutyrate (PHB) is a natural polymer accumulated in granules as intracellular energy storage in stress condition. The aim of this research was to isolate potential PHB producing bacteria from canned tuna wastewater activated sludge and cow dung. Five positive bacterial isolates were confi rmed the accumulation of PHB using lipophilic staining and TEM. To identify the bacterial species, the phylogenetic analyses inferred from 16S rDNA gene sequence demonstrated that the bacterial strains were closely related to Bacillus genera. The comparison of PHB production from bacterial isolates showed that SWU01 strain isolated from the activated sludge exhibited the highest yield of PHB production. The cultivation of SWU01 stain in optimization condition (modifi ed M9 medium supplemented with 2% sodium acetate and 0.5% yeast extract at pH 7 for 48 h) exhibited the yield of PHB up to 0.95 g/L or 7.5 compared with M9 medium supplemented with 2% glucose. Transmission electron micrograph showed high among of PHB in the granule of the bacterial cell. From all results, the bacterial strain SWU01, effi cient PHB producers, exhibited the potential for their utilization in commercial PHB production.
Titanium dioxide fiber saturable absorber for Q-switched fiber laser
generation in the 1-micrometer region: publisher’s note
Authors: Rahman M. F. A. , Reddy P. H. , Paul M. C. , Das S. , Dhar A. , Baharom M. F. , Latiff A. A. , Rusdi M. F. M. , Wang P. , Dimyati K. , Harun S. W.
Published: November 2022

This publisher’s note serves to correct an error in
Appl. Opt.
58, 3495 (2019)APOPAI0003-693510.1364/AO.58.003495.
Fabrication of ultra-high numerical aperture GeO2-doped fiber and its use for broadband supercontinuum generation: publisher’s note
Authors: Reddy P. Harshavardhan , Kir’yanov A. V. , Dhar Anirban , Das Shyamal , Dutta Debjit , Pal Mrinmay , Barmenkov Y. O. , Minguella-Gallardo J. A. , Bhadra Shyamal Kumar , Paul Mukul Chandra
Published: November 2022

This publisher’s note serves to correct Appl. Opt.
56, 9315 (2017)APOPAI0003-693510.1364/AO.56.009315.
Classical and Entangled Two-Photon Absorption in Organic Molecules
Authors: Torres Nova A. M. , Bedoya J. C. , Valencia A. , Nunez-Portela M.
Published: November 2022

Two-Photon absorption in Rhodamine B is study by measuring the cross-section when exciting the transition with laser light (TPA) and with entangled photon pairs (ETPA). The main characteristics of TPA and ETPA processes are presented.
Two-component critical power for Kerr-induced self-focusing
Authors: Sukhinin Alexey
Published: November 2022

Co-propagation of two high-intensity beams under Kerr nonlinearity is considered. The critical power of the two-color collapse was estimated numerically for beams with various topological charges.
Bone as a biomarker for detecting low dose of ionizing radiation: a pilot study
Authors: de Castro Pedro A. A , Dias Derly Augusto , Veloso Marcelo Noronha , Zezell Denise Maria
Published: November 2022

FTIR spectroscopy was able to discriminate bone samples receiving low-dose ionizing radiation doses (0.002 kGy, 0.004 kGy, 0.007 kGy), offering valuable insights in view of the understanding of radiation dose response in biological systems.
Analysis of thermooxidation progress in organic and conventional soybean oils by steady-state fluorescence spectroscopy
Authors: Lopes Carla Regina Borges , Silva Heron Dominguez Torres da , Courrol Lilia Coronato
Published: November 2022

The reduction in fluorescence intensity (λem.~430 nm/λexc. 340 nm) of conventional and organic soybean oils, heated at 175°C during different periods, indicates the progress of lipid thermooxidation.
Selective Detection and Genetic Similarity Demonstration of Dengue Virus in Seropositive Patients Using a Computational Guided Method on LSPR-Based Biosensor
Authors: Teixeira Felipe M. F. , de Freitas Felipe A. N. , de Backer Júlia , Versiani Alice F. , Andrade Lídia M. , da Fonseca Flávio G. , Ramirez Jhonattan C.
Published: November 2022

In this work, a computational-guided method for selectively detecting the four Dengue Virus serotypes in seropositive patients using an LSPR-based biosensor, is presented. In addition, the genetic similarity of DENV2/DENV3 and DENV1/DENV4, was computationally demonstrated.
Recent Advances in 3D Visualization with Multifocus Sensing in Augmented Reality and Fluorescence Microscopy
Authors: Alonso Julia R.
Published: November 2022

We overview our recent advances in multifocus sensing applied to 3D visualization when incorporated to augmented reality devices and fluorescence microscopy.
Coherent Carrier Dynamics of Lead-Halide Perovskite Nanoscrystals using Multidimensional Coherent Spectroscopy
Authors: Almeida Diogo B. , Liu Albert , Cundiff Steven T. , Padilha Lazaro A.
Published: November 2022

Perovskite nanocrystals belong to a novel class of nanomaterials target of intense scrutiny due to their unique optoelectronic properties. We explore their ultrafast carrier dynamics properties using multidimensional coherent spectroscopy.
First Observations of Rare-Earth Isotope Enrichment by Atomic Vapor Laser Separation in Brazil
Authors: Neto Jonas Jakutis , Bueno Patricia , dos Santos Jhonatha R , da Silveira Carlos A B , Rodrigues Nicolau A S , Victor Alessandro R , Destro Marcelo G , Volu Rene , Neri José W
Published: November 2022

Modern technologies depend on Rare-Earth elements, and they can be further improved using isotopic enriched/pure materials. This work brings the first successful attempt to enrich 163Dy by AVLIS (Atomic Vapor Laser Isotope Separation) in Brazil.
Surface Enhanced Raman Spectroscopy activity of hepcidin hormone over Au and Ag nanostructurated substrates: contribution for hyperinflammation screening
Authors: Rayo Alape Julián M. , Bandeira Carla Carolina Silva , Martinho Herculano
Published: November 2022

The hormone hepcidin present in saliva is a hyperinflammation markers for COVID-19 and other pathological states. Here we present DFT-based vibrational calculations that enabled assign the experimental vibrational spectra of hepcidin and predict its SERS-activiy.
Polarization-resolved Z-scan measurements for full discrimination among thermal, molecular orientation, and pure electronic refractive nonlinearities
Authors: Moysés R. M. , Barbano E. C. , Misoguti L.
Published: November 2022

We found that the Z-scan measurements as a function of the laser polarization are capable to distinguish cumulative-thermal, orientational, and ultrafast-electronic nonlinearities in CS2. These three nonlinearities were simultaneously excited using a high-repetition-rate ultrafast laser.
Nonlinear Absorption and Scattering Coefficients in Turbid Media using the Scattered Light Imaging Method (SLIM)
Authors: Jorge Kelly C. , Amaral Anderson M. , Reyna Albert S. , de Araújo Cid B. , de S. Menezes Leonardo
Published: November 2022

The Scattered Light Imaging Method has been recently proposed to characterize nonlinear coefficients using single laser shots. This work experimentally shows that nonlinear absorption and scattering are distinguishable in turbid samples.
Design, manufacturing and characterization of a polymer optical fiber pressure sensor for to posture monitoring applied in a wheelchair
Authors: González-Cely Aura Ximena , Díaz Camilo A. R. , Bastos-Filho Teodiano Freire , Segatto Marcelo Eduardo Vieira , Pontes Maria José
Published: November 2022

A low-cost system based on Polymer Optical Fiber pressure sensors fabricated in a 3D structure was developed to monitoring posture in a wheelchair. The system was characterized by tensile tests with a response time of 33.33μs.
Development of hybrid organic-inorganic coating based on carbon dots on bacterial cellulose using sol-gel route
Authors: Onishi Bruno Seiki Domingos , Bortoletto-Santos Ricardo , Neto Elias Paiva Ferreira , Ribeiro Sidney José Lima
Published: November 2022

The luminescence quenching by aggregation of carbon dots (CD) could be solved by functionalizing the surface with an alkoxysilane, bounding the nanoparticle directly in the polymer network.The reaction was monitored with ATR-FTIR and bacterial cellulose (BC) was coated with the precursor using sol-gel route, showing blue luminescence of CD.
Four wave-mixing with radio frequency-modulated optical tones in on-chip coupled microcavities
Authors: Tomazio Nathalia B. , Fujii Laís , Trinchão Luca O. , Jarschel Paulo F. , Mayer Alegre Thiago P. , Barbosa Felippe A. , Wiederhecker Gustavo S.
Published: November 2022

We demonstrate four wave-mixing in a triple state silicon nitride photonic molecule. Using microheaters to fine tune the resonant frequencies we can optimize the phase-matching conditions for FWM generation using a phase-coherent dual-tone pump scheme.
Modeling of graphene-based integrated optical amplifiers
Authors: Londono-Giraldo D.F. , de Souza E.A. Thoroh , Fragnito H.L.
Published: November 2022

We present the modeling of optical amplifiers based on the transient population inversion in optically pumped graphene atop integrated waveguides. We discuss the design criteria and introduce our results in the optimization of this device.
Generation of multiple ultrashort solitons in heterogeneous medium with self-focusing and defocusing nonlinearities
Authors: Siqueira André.C.A. , Malomed B.A. , de Araújo Cid B. , Falcão-Filho Edilson L.
Published: November 2022

We present an alternative way to generate multiple ultrashort solitons through the propagation of fs-Gaussian pulses, under normal dispersion, in a 1-D stack material consisting of self-focusing followed by a defocusing nonlinearity media. The spectral and temporal solitonic evolutions are numerically presented.
Assessment of bound water of saliva samples by using FT-IR spectroscopy
Authors: Ferreira Maria Clara Coelho , Monteiro Gabriela Reganin , Peralta Felipe , Castro Pedro Arthur Augusto , Zezell Denise , Nogueira Marcelo Saito , Carvalho Luis Felipe CS
Published: November 2022

The objective of the present work is to show the relationship of the high-wavenumber spectral region concern OH vibrations, which show in a way how bound water can be altered in different sample groups.
Liquid biopsy on serum samples: Fourier-Transform Infrared Spectroscopy as fatality predictor for COVID-19
Authors: Bandeira Carla Carolina , Madureira Karen Cristina Rolim , Rossi Meire Bocoli , Gallo Juliana Failde , da Silva Ana Paula Marques Aguirra , Torres Vilanilse Lopes , de Lima Vinicius Alves , Júnior Norival Kesper , Almeida Janete Dias , Zerbinati Rodrigo Merlim , Braz-Silva Paulo Henrique , Lindoso José Angelo Lauletta , Martinho Herculano da Silva
Published: November 2022

The fatality prediction in hyperinflammation diseases like COVID-19 is a challenge. We show here that FTIR could probe the degree of IgG glycosylation discriminating subpopulations of COVID-19 patients depending on their degree of severity.
Predicting mortality in cardiovascular diseases by Fourier-Transform Raman spectroscopy
Authors: Nepomuceno Gabrielle , Junho Carolina Victorio Cruz , Ramos Marcela Sorelli Carneiro , Martinho Herculano da Silva
Published: November 2022

In the present work, Fourier-Transform Raman spectroscopy was used to investigate the vibrational spectral characteristics of cardiac hypertrophy induced by renal ischemic reperfusion in an animal model. It was observed that monitoring the Tyrosine and Tryptophan bands as 1558, 1616, and 1625 cm−1 is a viable way to predict mortality in cardiovascular diseases.
Laser surface hardening of an AISI 1541 steel
Authors: Ligabo Isabela A. , Ferreira Caroline C.A. , Zanni Evandro G.S. , Siqueira Rafael H.M , Lima Milton S.F.
Published: November 2022

Laser surface hardening was carried out using an Yb:fiber laser. The microstructure of the laser hardened zone consists of ferrite, a small amount of retained austenitic phase and martensite, with the amount of martensite varying gradually along the depth.
Development of non-contact sheet metal forming using lasers
Authors: Zatta Gabriela L.S. , Liskevych Olga , Carvalho Sheila M. , Lima Milton S.F.
Published: November 2022

The laser can cause localized deformation, mainly linked to thin sheet processing, due to the rapid heating and cooling cycle. Laser beam forming (LBF) process is relevant for ductile materials such as steels, aluminum and titanium and is demonstrably viable on a laboratory scale for the formation of composite laminates such as aluminum into fiberglass. The objective of the present work is to understand the mechanisms of laser forming of non-contact aluminum sheets, investigating the influence of laser parameters on the angle of curvature obtained by laser processing.
Homodyne Detection of Dissipative Optomechanical Interactions
Authors: Primo André G. , Pinho Pedro V. , Carvalho Natália C. , Benevides Rodrigo , Kersul Cauê M. , Groeblacher Simon , Wiedehecker Gustavo S. , Mayer Alegre Thiago P.
Published: November 2022

We present and validate a novel route to directly probe the dissipative optomechanical coupling in a balanced homodyne detection scheme. The ratio between dissipative and dispersive coupling is determined as

G

κ
e

/

G
ω

≈
−
0.007
±
0.001

.
Physical Unclonable Functions based on random gratings
Authors: Monet Frédéric , Roberge Anthony , Kashyap Raman
Published: November 2022

Hardware-based irreproducible and unique keys such as Physical Unclonable Functions offer great potential for security and cryptographic applications. We demonstrate that the inscription of random gratings in optical fibers results in strongly performing PUF devices.
Investigation of Optical Beat Frequency in Mode-locked Erbium-doped Fiber Laser for Frequency Comb Stabilization
Authors: Araujo M. C. S. , Steinberg D. , Rosa H. G. , Zapata J. D. , Saito L. A. M. , Thoroh de Souza E. A.
Published: November 2022

We evaluated two configurations of EDFLs with different lengths and, consequently, different repetition rates as a condition of optimizing the power for the generated number of modes and improving the SNR of the beat frequency.
Compact, high-power, single-frequency, dynamically stable cw ring laser
Authors: Bereczki Allan , Wetter Niklaus
Published: November 2022

We recently reported a single-frequency Nd:YAG ring laser with 55.6 W CW output. In this work our design equations are given in order to obtain compactness and increasing resonator free spectral range.
Analysis of a Direct Detection All-Optical OFDM System Designed for Hybrid PON
Authors: Marciano Pablo Rafael Neves , Coelho Diogo Vieira Nogueira , Silva Jair Adriano Lima , Pontes Maria José , Segatto Marcelo Eduardo Vieira
Published: November 2022

Analysis of amplitude and phase modulation formats of OOK, optical PAM4, DPSK and DQPSK for direct-detection all-optical OFDM PON architecture. Transmission capacity of 1.2 Tbps over 90 km of SSMF was achieved with 128 carriers optical flat comb.
Synthesis and optical characterization of graphene oxide-functionalized biochars for boron incorporation
Authors: Franca Jose Romão , Ferreira Guilherme Max Dias , Ferreira Gabriel Max Dias , Longuinhos Raphael , Ribeiro-Soares Jenaina
Published: November 2022

Biochars are biomass-derived, aromatic-to-nanographene-like carbonaceous materials studied as fertilizers precursors. Graphene oxide-functionalized coffee husk biochars presented Raman and infrared results indicating crystallite size and functional group changes suitable to its use in boron micronutrient fertilizers.
Terahertz Pulling Force Enhanced by Graphene Surface Modes
Authors: Herrero Víctor , Ferrari Hernán , Zapata Rodríguez Carlos J. , Cuevas Mauro
Published: November 2022

The force on a dielectric nano particle close to graphene sheet covering a plane dielectric sustrate is analyzed. We illustrate large pulling force due to the self-action effect of the particle through the graphene interface.
Controlling Multiphoton Absorption with Nanocrystal Heterostructures
Authors: Alo Arthur , Barros Leonardo W. T. , Vieira Lucas B. , Nagamine Gabriel , Bae Wan K. , Padilha Lazaro A.
Published: November 2022

Multiphoton absorption of nanocrystals is shown to be dependent on the band alignment of heterostructures, allowing for control over the multiphoton interactions in these materials with minimal change to their photoluminescence spectra.
Spatial self-phase modulation in liquid suspensions of 2D layered metal transition dichalcogenides with linearly and circularly polarized light
Authors: Bautista Jessica E. Q. , Campos Cecília L. A. V. , da Silva-Neto Manoel L. , de Araújo Cid B. , Jawaid Ali M. , Busch Robert , Vaia Richard A. , Gomes Anderson S. L.
Published: November 2022

We discuss the physical mechanism responsible for spatial self-phase modulation in suspensions of 2D transition metal dichalcogenides using linearly and circularly polarized light, showing its thermal origin when CW or MHz-mode-locked lasers are employed.
Instrumentation of the Prosthesis PrHand Based on Soft-Robotics: Angle sensor with Optical Fiber
Authors: De Arco Laura , Pontes Maria José , Segatto Marcelo Eduardo Vieira , Cifuentes Carlos A. , Diaz Camilo A. R.
Published: November 2022

The development of a fiber optic sensor based on intensity variation for angle measurement of the PIP joint in the hand prosthesis PrHand based on soft-robotics is presented and discussed its viability
Patterning of BaTiO3:Er/Yb perovskite films using fs-laser micromachining to photonics devices
Authors: Clabel H. J. L. , P. K. Tasso , Marega E. , M. C. Renato
Published: November 2022

The laser pulse parameter dependence on the high precision micropatterned structures in BaTiO3:Er/Yb perovskite films provides a unique opportunity for direct fabrication of photonic devices. The result of micro-structure and guidelines on the appropriate conditions for micropatterning was investigated.
Real-time polarimetric and phase retrieval microscopy
Authors: Fernández Ariel
Published: November 2022

Polarization sensing as well as phase retrieval can be achieved in real-time by integrating image processing tools to an optical system which combines a microscope objective and a lenslet array with adequate pupil masks.
SARS-CoV-2 structures detection in artificial saliva using ATR-FTIR associated with Linear Discriminant Analysis
Authors: Taveira Elisa Borges , Guevara-Vega Marco Fidel , Santos Igor Andrade , Caixeta Douglas Carvalho , Grosche Victoria Riquena , Cunha Thulio Marquez , Carneiro Murillo Guimarães , Jardim Ana Carolina Gomes , Sabino-Silva Robinson
Published: November 2022

Here, we used ATR-FTIR platform supported by artificial intelligence algorithms to identify unique infrared vibrational modes of a pseudotyped human immunodeficiency virus type-1 (HIV-1) coupled to Spike (S) protein of SARS-CoV-2 (HIV/NanoLuc-SARS-CoV-2 pseudotype virus).
Rubidium optical frequency standard with two-color EIT cooling and interrogation
Authors: Cruz Flavio C. , Magno Wictor C.
Published: November 2022

We analyze the feasibility of a cold 87Rb optical frequency standard based on the S-P-D transition in which two-color EIT laser cooling and interrogation are performed at 780 and 776 nm.
First-principles model for an atomic memory based on recoil-induced resonances
Authors: Capella Juan Carlos Chaves , de Melo Alvaro Mitchell Galvão , Lopez Jesus Pavon , Barbosa Daniel Felinto Pires , Tabosa Jose Wellington Rocha
Published: November 2022

We present a first-principles model for a non-volatile atomic memory based on recoil-induced resonances (RIR) and directly compare it to experimental data obtaining a good agreement on all phases of the experiment.
Picosecond Thermal Nonlinearities in 2D – NbS2
Authors: Germano Gleice C. M. , da Silva Neto Manoel L. , Maldonado Melissa , Camara Alexandre R. , Araújo Leonardo F. , Jawaid Ali M. , Vaia Richard A , Moura André L. , Gomes Anderson S. L. , Carvalho Isabel C. S.
Published: November 2022

Here we investigate the third-order Nonlinear Optical (NLO) properties of Layered Transition Metal Dichalcogenides (LTMDs), the metallic NbS2. The Z-scan technique was employed to characterize the nonlinear refraction (NLR) and nonlinear absorption (NLA) behavior in the picosecond regime.
Multimodal Real-Time Imaging with Combined Optoacoustic and Laser Ultrasonic Tomography System with Toroidal Sensors Array
Authors: Simonova Varvara , Bychkov Anton , Zarubin Vasily , Kudinov Igor , Karabutov Alexander
Published: November 2022

First toroidally focused 2D real-time laser-ultrasonic imaging system was demonstrated. The system is capable of visualizing an acupuncture needle 0.2 mm in diameter located at ~4 cm depth in water. The lateral spatial resolution is better than ~0.32 mm and axial spatial resolution is ~30 µm. The achieved frame rate is up to 30 Hz. The depth dependency of the sensitivity region width and lateral resolution are experimentally measured and discussed. The array is intended to be used as a part of combined real-time photoacoustic and laser-ultrasonic imaging system.
Fabrication of 3D Microenvironments for the Development of Microorganisms
Authors: Moraes Jonathas Q. R. , Otuka Adriano J. G. , de Oliveira Analú B. , Fontana Carla R. , Mendonça Cleber R.
Published: November 2022

Probiotics are microorganisms that have positive immunologic effects on their host [1]. Polymeric microenvironments were made to study bacterial behaviour. E. coli biocompatibility tests were successful, and further studies with Lactobacillus sp. probiotics should follow.
Optical heating of metallic nanostructures: selecting optimized structures
Authors: de L. Pedrosa Túlio , de Araujo Renato E.
Published: November 2022

Temperature control is a crucial parameter that can be achieved with the use of nanoplasmonic structures. With this purpose, gold nanoparticles has been widely explored to improve the effectiveness of applications where photothermal conversion is required. In this work, we optimize gold nanospheres and nanorods for plasmon-mediated heat generation.
Tunable multiwavelength optical fiber laser via Mach-Zehnder interferometer based on optical fiber tapers
Authors: Salceda-Delgado G. , Martinez-Rios A. , Selvas-Aguilar R. , Torres-Torres M. , Rodríguez-Carreón V. C. , López-Zentenom J. I. , Alonso-Cruz J. R.
Published: November 2022

A tunable multiwavelength optical fiber laser is presented. It is based on the bending of an optical fiber Mach-Zehnder interferometer. The laser emissions can be tuned by factors around 1.97 nm/mm via bending the interferometer.
Time-Resolved Femtosecond Laser-Plasma Measurements by a Mach-Zehnder-Like Interferometer
Authors: Zuffi Armando Valter Felicio , Maldonado Edison Puig , Vieira Nilson Dias , Samad Ricardo Elgul
Published: November 2022

This work reports measurements of the density profile of laser-generated plasmas by a home-built time-resolved Mach-Zehnder-like interferometer. This device will integrate our laboratory infrastructure for laser wakefield acceleration experiments.
Determination of linear and nonlinear optical properties of branched polyfluorenes in function of effective electron number
Authors: Zucolotto Cocca Leandro H. , Pelosi André Gasparotto , Abegão Luis M. G. , Andraud Chantal , Mendonça Cleber R. , Vivas Marcelo G. , De Boni Leonardo
Published: November 2022

We determine the two-photon absorption (2PA) cross section spectra branched polyfluorenes distinguished by the number of fluorenes and chemical architecture. Moreover, the optical properties were determined in function of the effective electrons number of each compound.
Nonlinear Refractive Index of Terbium Doped Germanate Glass
Authors: Pelosi André Gasparotto , Henrique Franciele Renata , de Almeida Juliana Mara Pinto , Nalin Marcelo , Franco Douglas F. , Cocca Leandro Henrique Zucolotto , Mendonça Cleber Renato
Published: November 2022

A study of nonlinear refractive index (n2) of terbium-doped germanate glass was done. A large optical transparency window was observed, and average value of n2 of 7.5x10-20 m2W-1 was obtained.
Self-Adhesive Polydimethylsiloxane (PDMS)-Packaged Fiber Bragg Grating for Strain-Free Temperature Sensing
Authors: Liu Shuochao , Zhu Pingyu , Xie Fumin , Lin Zhecong , Soto Marcelo A.
Published: November 2022

A polydimethylsiloxane packaging for fiber Bragg gratings is proposed to mitigate strain transfer and provide self-adhesion to structures. Using no glue, results show strong adhesion of the packaging and temperature sensing with >95% strain reduction.
400 km-Loop BOTDA Enabled by Hybrid Amplification Based on Distributed Raman and Erbium-Doped Fibers
Authors: Yang Zhisheng , Sun Xizi , Hong Xiaobin , Jin Simeng , Soto Marcelo A. , Wu Jian
Published: November 2022

A 200 km real remoteness for Brillouin optical time-domain analysis is demonstrated based on a compensating pulse for distortion-free measurements and a hybrid amplification composed of distributed Raman and remotely pumped Erbium-doped fibers.
Sensitivity enhancement of photothermal gas detection via optical phase-modulation amplification
Authors: Hong Yingzhen , Chen Feifan , Bao Haihong , Gao Shoufei , Ho Hoi Lut , Wang Yingying , Jin Wei
Published: November 2022

We report an optical phase-modulation amplifier for enhancing the sensitivity of photothermal spectroscopic sensors. An amplification factor of nearly 20 is achieved, which enables sub-ppb level carbon dioxide detection with a 0.5-m-long hollow-core fiber.
Multiresponsive smart cavity based lab-on-fiber optrode
Authors: Giaquinto M. , Gambino F. , Cicatiello P. , Micco A. , Aliberti A. , Cusano A. M. , Ricciardi A. , Cusano A.
Published: November 2022

A microgel based optical cavity, properly functionalized to swell/collapse when exposed to biomolecules, charged polymers, and pH variations, is integrated onto an optical fiber tip, to realize a multi-functional lab-on fiber optrode for biochemical sensing.
Distributed Acoustic Sensing in Seismology
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 2022

We review the use of Distributed Acoustic Sensing for the characterization of tele-seismic and micro-seismic activity. We show that this tool may offer impressive new capabilities in the field of seismology, particularly in underwater scenarios.
Towards large-scale entanglement-enhanced interferometry
Authors: Silvestri Raffaele , Peterson Robert W. , Hilweg Christopher , Yu Haocun , Walther Philip
Published: November 2022

We report progress measuring Earth’s rotation with entangled photons. In our 2 km fiber Sagnac interferometer, we achieve milliradian sensitivity with cw light, find a preliminary signal, and work towards injecting 2-photon NOON states.
A Self-referenced Fiber Refractometer using a Pattern-recognition Algorithm for Unambiguous Refractive Index Measurements
Authors: Martínez-Manuel Rodolfo , Valentín-Coronado Luis M. , Esquivel-Hernández Jonathan , Monga Kaboko Jean-Jacques , LaRochelle Sophie
Published: November 2022

We propose to use a pattern-recognition algorithm for measuring refractive index of different liquid samples and to overcome the ambiguity effect commonly presented in fiber refractometers using Fresnel reflection at the tip of the fiber.
Microfiber evanescent-wave photothermal methane sensor with sub-ppm sensitivity
Authors: Zhao Pengcheng , Fan Shangchun , Ho Hoi Lut , Jin Wei
Published: November 2022

We report microfiber evanescent-wave photothermal spectroscopy for trace gas detection. With a 2-cm-long silica microfiber, detection limit of 440 ppb methane is achieved with dynamic range of nearly six orders of magnitude and response time of less than 7 seconds.
Micro-displacement Sensor based on Hollow Core Fiber Interferometers
Authors: Sanchez-Gonzalez A. , Rodriguez-Rodriguez A. , Dauliat R. , Jamier R. , Roy P. , Perez-Herrera R. A. , Lopez-Amo M.
Published: November 2022

An interferometric sensor based on hollow core fibers for the measurement of micro-displacement has been designed. Its characterization has resulted in a linear response, suggesting its application in pressure sensors.
Research on ultra long range Φ-OTDR distributed vibration measuring system based on ROPA technology
Authors: Yu Jiekui , Liu Jiasheng , Hu Qianggao , Xu Jian , Nie Mingchao , Chen Xingyun , Wu Jianjun , Zhang Xiaojiao , Liu Hongkai , Yu Shizhan , Li Guoxiang , Qin Xiao
Published: November 2022

The ROPA technique has great application prospects for Φ-OTDR relayless engineering applications. This paper realized the 175km vibration sensing distance by using the ROPA and the third-order Raman technology, which can enhance the optical power of the detection signal significantly. At the end of the fiber, a vibration source device PZT is used to ensure the accurate identification of events.
Simplified hybrid distributed fiber-optic sensing system by using Brillouin pump pulse to amplify Rayleigh backscattering lightwave
Authors: Huang Linjing , Fan Xinyu , He Zuyuan
Published: November 2022

We propose a simplified single-end Rayleigh and Brillouin distributed fiber-optic sensing system which can simultaneously measure static and dynamic parameters by using Brillouin pump pulse to amplify Rayleigh backscattering lightwave and realize 10-km sensing range.
Comparison of fiber in line Fabry-Pérot pressure sensors for harsh environment in aeronautic field
Authors: Tomboza Wendy , Labat Damien , Habert Remi , Cotillard Romain , Roussel Nicolas , Pohl Didier , Laffont Guillaume , Huy Minh Chau Phan , Bouwmans Géraud
Published: November 2022

In this paper, we propose a comparison of fiber in-line Fabry-Pérot pressure sensors with different structure. The modeling and simulation of pressure sensor with different diaphragm and cavity shape is made. The sensor temperature response up to 900°C is presented. Pressure measurement up to 70bar of four different sensors are demonstrated.
Quasi-distributed fiber-optic acoustic sensing system based on low coherence optical frequency domain reflectometry
Authors: Deng Yuanpeng , Liu Qinwen , Zhao Shuangxiang , He Zuyuan
Published: November 2022

We demonstrate a quasi-distributed acoustic sensing system with low coherence optical frequency domain reflectometry and weak reflectors array. With broadband light source and simple structure, strain resolution of

 0
.05n
ε
/ 

H
z

at 1 kHz with 20 m interval is achieved.
Parallel FBGs in Sapphire Fiber for High Temperature Sensing
Authors: Shi Guannan , Pickrell Gary , Wang Anbo , Zhu Yizheng
Published: November 2022

This paper presents parallel FBGs in sapphire fiber to significantly boost the signal intensity of high order FBGs. Cascaded parallel FBGs are fabricated and achieve multi-point high temperature sensing.
Analysis of distributed acoustic sensing in multimode fibers based on heterodyne optical time domain reflectometry
Authors: Orsuti Daniele , Marcon Gianluca , Turolla Axel , Santagiustina Marco , Galtarossa Andrea , Zampato Massimo , Palmieri Luca
Published: November 2022

The performance of a distributed acoustic sensor based on heterodyne OTDR applied to multimode fibers is analyzed. Substantial reduction of the noise floor is achieved by exploiting spatial diversity and a novel aggregation algorithm.
Vibration Sensing Based on Inter-Modal Interference Using Two-Mode Region of Conventional Single-Mode Fibers
Authors: Nakamura Atsushi , Manabe Tetsuya , Koshikiya Yusuke
Published: November 2022

We propose a vibration sensing method using the two-mode region of conventional single-mode fibers. Our method detects vibrations by observing and analyzing transmitted power variations due to interference between the fundamental and second-order modes.
Quadrature channels generation using two unmodulated DFB lasers for passive demodulation of multiplexed interferometric sensors
Authors: López Jorge H. , Shlyagin Mikhail G. , May-Arrioja Daniel , Martínez-Manuel Rodolfo
Published: November 2022

A novel passive demodulation approach of relatively long multiplexed interferometers based on two-channel correlation reflectometer is proposed. Quadrature channels generation and demultiplexing of interferometers is achieved using DFB diode lasers and correlation post-processing of signals.
Linear-in-distance resonance frequency mapping for quasi-distributed measurement based on an identical weak fiber Bragg grating array
Authors: Kim Gyeong Hun , Chung Youngjoo , Kim Chang-Seok
Published: November 2022

This paper reports the real-time linear-in-distance sampling for a resonance frequency mapping system based on an identical weak fiber Bragg grating (FBG) array. Based on a function of an external clock for the sampling timing of uniform distance spacing, 100 identical weak FBGs could be interrogatedexamined with a high linearity of 0.9996 (R2).
Graphene oxide Quantum dots (GQDs) based optical fiber humidity sensor
Authors: Mohan Sunil , Khijwania Sunil K.
Published: November 2022

A novel optical fiber humidity sensor employing GQDs diffused microstructure sensing cladding is reported. Sensor exhibits linear sensitivity (0.0679dB/%RH) which is 7 times higher in comparison to the sensor based on pure silica nanostructured cladding.
A Tapered Intrinsic Fabry-Perot Interferometer Fabricated by a CO2 Laser and its Application as a Refractive Index Sensor
Authors: Yi Xinruo , Zhao Kehao , Li Yuqi , Wang Qirui , Buric Michael , Wright Ruishu , Chen Kevin P.
Published: November 2022

We present a highly reproducible method of fabricating a tapered intrinsic Fabry-Perot interferometer device with 6-µm taper waist through an integrated femtosecond and CO2 laser approach. This device demonstrates a minimal refractive index sensing resolution ~2×10-5.
Detection of Ultrasonic Guided Waves Using Fiber Optical Sensors Toward Nondestructive Evaluation
Authors: Wang Qirui , Zhao Kehao , Zhong Shuda , Yi Xinruo , Zhao Jieru , Gribok Andrei V. , Chen Kevin P.
Published: November 2022

This paper demonstrates distributed fiber sensor’s detection of ultrasonic guided waves in a metal pipe generated by magnetostrictive acoustic transducers. Temporal profiles of 32-kHz ultrasonic guided waves reflected from defects can be readily resolved.
Demonstration of Coherent Interference between Acoustic Waves Using Fiber Ring Resonator
Authors: Kim Jee Myung , Peters Kara
Published: November 2022

Coherence of acoustic wave coupling through adhesive bond coupler is investigated using fiber ring resonator configuration. Coherent interference is observed between different kinds of fibers, opening up possibilities for sensing in field applications.
High-resolution optical correlation-domain analysis on Brillouin dynamic grating using a matched filter and a differential measurement scheme
Authors: Youn Jae Hyeong , Song Kwang Yong
Published: November 2022

High-resolution optical correlation-domain analysis on the Brillouin dynamic grating in a polarization-maintaining fiber is experimentally demonstrated. A spatial resolution of 5 cm is obtained by simultaneously applying a matched filter and a differential measurement scheme.
Random Fiber Laser Hydrophone
Authors: Tian Meng , Zhang Wentao , Lv Bing
Published: November 2022

To the best of our knowledge, this is the first time that random fiber laser is used for underwater acoustic detection. The results show a better stability than DFB fiber laser hydrophone.
Distance Measurement to Multiple Reflection Points Using Intensity Correlation Signal Produced by Two-Photon Absorption Process in Si-APD
Authors: Saito Itsuki , Tanaka Yosuke
Published: November 2022

We successfully performed proof-of-concept experiment on distance measurement to multiple reflection points using optical pulses and intensity correlation signal generated by two-photon absorption process in Si-APD.
Revisiting Distributed Acoustic Sensing: A Telecom Approach Inspired from Optical Transmission
Authors: Dorize Christian , Guerrier Sterenn , Awwad Elie , Renaudier Jérémie
Published: November 2022

we review digital techniques used in transmission through telecom fibres and show they can be tailored to Distributed Acoustic Sensing (DAS), with key advantages in terms of noise floor and scalability to targeted applications.
Brillouin Spectrum and Measurement of Strain and Temperature in DCF38 Fiber
Authors: Turker Volkan , Uyar Faruk , Kartaloglu Tolga , Ozbay Ekmel , Ozdur Ibrahim
Published: November 2022

Brillouin spectrum of dispersion compensating fiber (DCF38) is investigated and strain and temperature measurement based on Brillouin frequency shift is performed.
DAS signal denoising with adaptive beamforming
Authors: Xin Peilian , Han Bing , Rao Yunjiang , Zhang Lixia , Wu Huijuan , Shao Tianqi , Ran Zengling
Published: November 2022

A novel DAS signal denoising method is proposed by utilizing the adaptive beamforming (ABF) method and signal quality is improved by 10.6 dB, which can be applied to signal quality promotion for all types of DAS.
Fusion of Distributed Fiber Optic Sensing, Acoustic NDE, and Artificial Intelligence for Infrastructure Monitoring
Authors: Ohodnicki P. R. , Zhang P. , Lalam N. , Karki D. , Venketeswaran A. , Babaee H. , Wright R.
Published: November 2022

Emerging opportunities combining acoustic non-destructive evaluation, optical fiber sensing, and AI are discussed for infrastructure monitoring spanning electrical grid, oil and gas (CH4, H2, CO2) pipelines, oil and gas recovery, and civil (roads, bridges, water).
25 Million Sensing Measurements Per Second Using Quasi-Integer Ratio Time-Expanded φOTDR
Authors: Soriano-Amat Miguel , Martins Hugo F. , Durán Vicente , Martin-Lopez Sonia , Gonzalez-Herraez Miguel , Fernández-Ruiz María R.
Published: November 2022

We demonstrate the detection of strain perturbations along a 500 m optical fiber with 2 cm spatial resolution and 1 kHz sampling frequency via quasi-integer-ratio time-expanded φOTDR, requiring less than 100 MHz photodetection bandwidth.
Distributed Acoustic Sensing Features Enhanced by Blind Near-Field Array Signal Processing
Authors: Muñoz Felipe , Soto Marcelo A.
Published: November 2022

A blind near-field array signal processing method for distributed acoustic sensors is proposed. Experimental results demonstrate a 5.5dB signal-to-noise ratio enhancement and the capability to localize acoustic sources with errors as low as 0.82%.
Brillouin Optical Time-Domain Distributed Analysis of Cladding Modes in a Coated Fiber
Authors: Zehavi Elad , Bernstein Alon , Bashan Gil , London Yosef , Diamandi Hilel Hagai , Sharma Kavita , Hen Mirit , Zadok A.
Published: November 2022

Brillouin optical time domain analysis of coupling to cladding modes of standard, coated fiber is demonstrated. Uncertainty in local changes of effective indices is below 10-6 RIU. Local effect of acetone on coating is identified.
The Effects of Gravity and an Axial Magnetic Field on the Crystallization of ZBLAN Glass
Authors: Tucker Dennis S.
Published: November 2022

ZBLAN (ZrF4-BaF2-LaF3-AlF3-NaF) glass is of great interest due to its potential low loss characteristic which is an order of magnitude greater than fused silica. However, it is a fragile glass with a tendency to crystallize which affects the loss coefficient. Results are given showing that microgravity and an axial magnetic field suppress crystallization.
Investigation of aluminum doped and aluminum thulium co-doped optical fibers for gamma radiation measurements
Authors: Gallet Antoine , Caussanel Matthieu , Duval Hervé , Djama Kadar Mahamoud , Thil Stéphane , Eynard Julien , Grieu Stéphane , Trzesien Stanislaw , Ude Michéle , Dussardier Bernard
Published: November 2022

Gamma-induced RIA of aluminosilicate and Al/Tm co-doped optical fibers is investigated in the visible and near-infrared domain. The data reveal a promising interrogation wavelength for low dose, highly sensitive dosimetry with Al/Tm fibers.
Performance Evaluation of Reference Reflections in Polymer Optical Fibers for Strain Sensing
Authors: Dengler S. A. , Roseeu Gonzalez R. V. , Luber M. , Ziemann O. , Engelbrecht R. , Schmauss B.
Published: November 2022

We present a robust concept for quasi distributed strain measurement using optical time domain reflectometry (OTDR) in polymer optical fibers (POF). The spatial shifts of discrete reflective events in the OTDR trace are evaluated as reference points. It is shown how such reference reflections can be prepared and which properties can be expected.
Spatially resolved dual-comb sensing using a single electro-optic modulator
Authors: Escobar-Vera Camilo , Soriano-Amat Miguel , Moreno-Oyervides Aldo , Khan Farid Ullah , Bonilla-Manrique Oscar E. , Fernández-Ruiz María R , Martin-Lopez Sonia , Durán Vicente , Gonzalez-Herraez Miguel , Martín-Mateos Pedro
Published: November 2022

We present a dual-comb imaging system based on a single pseudo-randomly driven electro-optic modulator. The result is a cost-efficient and robust fiber-based scheme that can be employed to perform spatially resolved spectral sensing.
Distributed Brillouin Fiber Laser Sensor
Authors: Murray Joseph B. , Cerjan Alex , Redding Brandon
Published: November 2022

We present a distributed Brillouin fiber sensor that operates by exciting a series of discrete lasing modes. This approach provides inherently wide dynamic range (5mε) while the narrow linewidth lasing modes enable low noise (8nε/√Hz).
Over 2 million sensing points Brillouin optical correlation domain analysis with Raman amplification and injection locking scheme.
Authors: Jeong Wookjin , Song Kwang Yong , Kim Gyu-Tae , Lee Sang Bae , Lee Kwanil
Published: November 2022

We propose a high resolution time-domain data processed BOCDA with more than 2 million sensing points by adopting Raman amplification, differential measurement scheme, and the injecting locking.
Investigation of Strain Behavior during Aluminum Casting Process with Regenerated Fiber Bragg Grating Arrays
Authors: Bian Qiang , Bauer Constantin , Stadler Andrea , Buchfellner Fabian , Jakobi Martin , Volk Wolfram , Koch Alexander W. , Roths Johannes
Published: November 2022

The strain evolution and distribution during an aluminum casting were monitored with regenerated fiber Bragg gratings, showing that the strain behavior was highly related to the solidification characteristics of the aluminum alloy.
Mid-infrared reflective mode-phase-difference photothermal spectroscopy for methane detection in a hollow-core fiber
Authors: Chen Feifan , Jiang Shoulin , Gao Shoufei , Wang Yingying , Ho Hoi Lut , Jin Wei
Published: November 2022

We demonstrate a methane sensor based on reflective mode-phase-difference photothermal spectroscopy. With a 1.8-m-long anti-resonant hollow-core fiber and a 3.27 μm pump laser, a noise-equivalent concentration of 44 ppt is achieved with 800 s integration time.
Study of Adverse Effects on Fiber Bragg Grating Sensors in Lithium-Ion Pouch Cells
Authors: Unterkofler Johanna , Glanz Gregor , Koller Markus , Klambauer Reinhard , Bergmann Alexander
Published: November 2022

We study a fiber Bragg grating (FBG) sensor array inside lithium-ion pouch cells to measure the temperature. A comparison of the sensor response before and after embedding in a cell is performed. Several adverse effects have been identified inside the battery that influence the FBGs.
Spatially dynamic temperature monitoring of Hydrogen flame by telecom fiber using OFDR
Authors: Chen Chen , Chen Liang , Bao Xiaoyi
Published: November 2022

The distributed temperature profile of hydrogen flame based on OFDR was experimentally demonstrated for the first time. Spatially dynamic temperature field of H2 flame was monitored via a telecom fiber withstanding the flame over 30 seconds at 1000 °C. Higher temperature measurement beyond 1100 °C is possible with a fast system response time (<1s).
Machine Learning Model using a Fiber Bragg Grating-based Sensor System to measure Battery State-of-Charge
Authors: Bandyopadhyay Sankhyabrata , Fabian Matthias , Bremner James , Liu Xuan , Li Xiang , Li Kang , Sun Tong , Grattan Kenneth T V
Published: November 2022

A data-driven regression model using Machine Learning (ML) coding has been developed to predict the state-of-the-charge of a battery based on a Fiber Bragg Grating-based sensor, achieving a supervised ML model accuracy of 99.95%.
DVS-Signal Classification Analysis Using Widrow-Hoff Learning Algorithm for Cabling Environment
Authors: Inoue Masaaki , Kito Chihiro , Mine Koji , Koshikiya Yusuke
Published: November 2022

We investigate a machine learning algorithm that interprets distributed vibration in a telecommunication facility environment. This is the first evaluation on the accuracy of a classification algorithm using field data in a cable tunnel.
An efficient DAS signal recognition method in complicated urban environments
Authors: Liu Xinyu , Wang Yufeng , Liu Liang , Tu Yunlin , Sun Yuwen , Wu Huijuan , Rao Yunjiang
Published: November 2022

An attention-based ResNet model is proposed for DAS signal recognition, by focusing on the key time-frequency information through feature attention of channel and local structure. The best recognition accuracy and computation efficiency are simultaneously achieved.