Pub Date : 2023-07-30DOI: 10.1109/OMN/SBFotonIOPC58971.2023.10230929
J. Dipold, C. Bordon, Evellyn S. Magalhães, L. Kassab, E. Jiménez-Villar, N. Wetter
Random lasers are easier and cheaper to manufacture than regular ones, being made of several materials such as polymers, powders or dyes. Glass random lasers have been rarely studied due to their inhomogeneous broadened emission and low damage threshold. Here, we study Nd3+doped Te02-ZnO-Al203 glasses with different concentrations of rare-earth doping (4 wt.%, 8 wt.% and 16 wt.%). Emission intensity per pump fluence and fluorescence decay time measurements showed the potential of these glasses for random laser applications in the near-infrared region.
{"title":"Random Laser Emission in Nd3+ Doped Tellurite Glass","authors":"J. Dipold, C. Bordon, Evellyn S. Magalhães, L. Kassab, E. Jiménez-Villar, N. Wetter","doi":"10.1109/OMN/SBFotonIOPC58971.2023.10230929","DOIUrl":"https://doi.org/10.1109/OMN/SBFotonIOPC58971.2023.10230929","url":null,"abstract":"Random lasers are easier and cheaper to manufacture than regular ones, being made of several materials such as polymers, powders or dyes. Glass random lasers have been rarely studied due to their inhomogeneous broadened emission and low damage threshold. Here, we study Nd3+doped Te02-ZnO-Al203 glasses with different concentrations of rare-earth doping (4 wt.%, 8 wt.% and 16 wt.%). Emission intensity per pump fluence and fluorescence decay time measurements showed the potential of these glasses for random laser applications in the near-infrared region.","PeriodicalId":31141,"journal":{"name":"Netcom","volume":"45 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78526867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-30DOI: 10.1109/OMN/SBFotonIOPC58971.2023.10230939
L. Ambrosio, J. O. de Sarro, V. S. de Angelis, A. Dorrah, Priyanuj Bordoloi, M. Zamboni-Rached, F. Capasso
We discuss theoretical aspects of longitudinally-structured light-sheets constructed from superpositions of Bessel beams, envisioning applications in holography, volumetric displays, augmented and virtual reality, optical trapping and manipulation of microparticles and so on. Current experimental setups are presented.
{"title":"Light-Sheets Composed of Bessel Beams for Three-Dimensional Holography and Imaging","authors":"L. Ambrosio, J. O. de Sarro, V. S. de Angelis, A. Dorrah, Priyanuj Bordoloi, M. Zamboni-Rached, F. Capasso","doi":"10.1109/OMN/SBFotonIOPC58971.2023.10230939","DOIUrl":"https://doi.org/10.1109/OMN/SBFotonIOPC58971.2023.10230939","url":null,"abstract":"We discuss theoretical aspects of longitudinally-structured light-sheets constructed from superpositions of Bessel beams, envisioning applications in holography, volumetric displays, augmented and virtual reality, optical trapping and manipulation of microparticles and so on. Current experimental setups are presented.","PeriodicalId":31141,"journal":{"name":"Netcom","volume":"44 1","pages":"01-02"},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73004774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-30DOI: 10.1109/OMN/SBFotonIOPC58971.2023.10230987
Felipe B. Mazzi, Felippe Alexandre Silva Barbosa
Thin-film lithium niobate (TFLN) is a promising candidate for photonic-based quantum information technology. This platform combines large nonlinear and electro-optical coefficients with the tight confinement and reduced footprint characteristic of integrated devices. Nonetheless, current high-performance devices in TFLN generally rely on the use of hydrogen-silsesquioxane (HSQ) resist, or on silicon dioxide hard-masks, adding complexity to the fabrication process. Here, we fabricate and characterize optical resonators in TFLN using readily available organic deep UV resist. This process constitutes an alternative for more accessible microfabrication of TFLN photonic devices.
{"title":"Organic resist based fabrication of integrated waveguides and ring resonators in thin-film lithium niobate","authors":"Felipe B. Mazzi, Felippe Alexandre Silva Barbosa","doi":"10.1109/OMN/SBFotonIOPC58971.2023.10230987","DOIUrl":"https://doi.org/10.1109/OMN/SBFotonIOPC58971.2023.10230987","url":null,"abstract":"Thin-film lithium niobate (TFLN) is a promising candidate for photonic-based quantum information technology. This platform combines large nonlinear and electro-optical coefficients with the tight confinement and reduced footprint characteristic of integrated devices. Nonetheless, current high-performance devices in TFLN generally rely on the use of hydrogen-silsesquioxane (HSQ) resist, or on silicon dioxide hard-masks, adding complexity to the fabrication process. Here, we fabricate and characterize optical resonators in TFLN using readily available organic deep UV resist. This process constitutes an alternative for more accessible microfabrication of TFLN photonic devices.","PeriodicalId":31141,"journal":{"name":"Netcom","volume":"44 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76330688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-30DOI: 10.1109/OMN/SBFotonIOPC58971.2023.10230972
David Esteban Farfan-Guillen, L. C. Vieira, A. de Almeida Prado Pohl
In this work, the multiple-input, single-output (MISO) technique is implemented with OFDM modulation and the variation of the cyclic prefix (CP) is used to optimize the performance of an indoor VLC link, while maintaining the lighting conditions within the recommended levels (300–500 lux). Results show that by increasing the number of luminaires and by selecting the appropriate value of the OFDM cyclic prefix, the system's bit error rate (BER ≤ 10–3) is improved.
{"title":"Experimental Study of a MISO-VLC using two LED Luminaires","authors":"David Esteban Farfan-Guillen, L. C. Vieira, A. de Almeida Prado Pohl","doi":"10.1109/OMN/SBFotonIOPC58971.2023.10230972","DOIUrl":"https://doi.org/10.1109/OMN/SBFotonIOPC58971.2023.10230972","url":null,"abstract":"In this work, the multiple-input, single-output (MISO) technique is implemented with OFDM modulation and the variation of the cyclic prefix (CP) is used to optimize the performance of an indoor VLC link, while maintaining the lighting conditions within the recommended levels (300–500 lux). Results show that by increasing the number of luminaires and by selecting the appropriate value of the OFDM cyclic prefix, the system's bit error rate (BER ≤ 10–3) is improved.","PeriodicalId":31141,"journal":{"name":"Netcom","volume":"2 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89325241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-30DOI: 10.1109/OMN/SBFotonIOPC58971.2023.10230914
A. V. Zuffi, J. R. dos Santos, R. Samad
We present a simple ionization model to assess the density of plasmas created in air by ionization induced by the electric field of ultrashort laser pulses. It calculates the average ionization induced by the laser taking into account the known threshold intensities for each ionic state, the beam spatial profile and the atmospheric composition, estimating the plasma density. The model density predictions are compared to experimental results obtained by a time-resolved Mach-Zehnder-like interferometer, and are also used as entry parameters to evaluate the plasma temperature by the Saha equation.
{"title":"Ionization Model to Estimate the Density and Temperature Offs-Laser-Induced Plasmas in Air","authors":"A. V. Zuffi, J. R. dos Santos, R. Samad","doi":"10.1109/OMN/SBFotonIOPC58971.2023.10230914","DOIUrl":"https://doi.org/10.1109/OMN/SBFotonIOPC58971.2023.10230914","url":null,"abstract":"We present a simple ionization model to assess the density of plasmas created in air by ionization induced by the electric field of ultrashort laser pulses. It calculates the average ionization induced by the laser taking into account the known threshold intensities for each ionic state, the beam spatial profile and the atmospheric composition, estimating the plasma density. The model density predictions are compared to experimental results obtained by a time-resolved Mach-Zehnder-like interferometer, and are also used as entry parameters to evaluate the plasma temperature by the Saha equation.","PeriodicalId":31141,"journal":{"name":"Netcom","volume":"4 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88477387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-30DOI: 10.1109/OMN/SBFotonIOPC58971.2023.10230978
I. S. Lopes, Lilia Coronato Courrol
Nanopriming is a simple and cost-effective method for seed germination and consists in using nanoparticles (NPs) in a solution for a determined period. In this paper, sunflower seeds were primed with water and silver NPs produced with aminolevulinic acid (ALA) and Mimusops Coriacea leaves extract, both synthesized by the photoreduction method. The fluorescence spectra and decay time of the chlorophyll extract of seedlings ten days after nanopriming were measured. The results indicated that silver NPs increased seed germination, seedling growth, and chlorophyll production compared to water-primed seeds. No toxicity was observed with the presence of silver NPs
{"title":"Evaluation of Silver Nanoparticles Synthesized with ALA and Plant Extract in Seed Nanopriming","authors":"I. S. Lopes, Lilia Coronato Courrol","doi":"10.1109/OMN/SBFotonIOPC58971.2023.10230978","DOIUrl":"https://doi.org/10.1109/OMN/SBFotonIOPC58971.2023.10230978","url":null,"abstract":"Nanopriming is a simple and cost-effective method for seed germination and consists in using nanoparticles (NPs) in a solution for a determined period. In this paper, sunflower seeds were primed with water and silver NPs produced with aminolevulinic acid (ALA) and Mimusops Coriacea leaves extract, both synthesized by the photoreduction method. The fluorescence spectra and decay time of the chlorophyll extract of seedlings ten days after nanopriming were measured. The results indicated that silver NPs increased seed germination, seedling growth, and chlorophyll production compared to water-primed seeds. No toxicity was observed with the presence of silver NPs","PeriodicalId":31141,"journal":{"name":"Netcom","volume":"36 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82678724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-30DOI: 10.1109/OMN/SBFotonIOPC58971.2023.10230970
Ursula F. S. Roggero, Jorge R. Fernández, A. Seifert, H. Hernández-Figueroa
Operating optical biosensors outside laboratories presents a major challenge. This work presents a novel approach by introducing a practical coupling mechanism and using SU-8 polymer to reduce the complexity of the fabrication process. Additionally, software techniques used for detection allow for potential improvements without requiring costly hardware. The limit of detection of the proposed device is 3 × 10− 5RIU.
{"title":"Pigtailed Polymeric Optical Biosensor based on Interferometric Multimode Waveguide and Image Processing","authors":"Ursula F. S. Roggero, Jorge R. Fernández, A. Seifert, H. Hernández-Figueroa","doi":"10.1109/OMN/SBFotonIOPC58971.2023.10230970","DOIUrl":"https://doi.org/10.1109/OMN/SBFotonIOPC58971.2023.10230970","url":null,"abstract":"Operating optical biosensors outside laboratories presents a major challenge. This work presents a novel approach by introducing a practical coupling mechanism and using SU-8 polymer to reduce the complexity of the fabrication process. Additionally, software techniques used for detection allow for potential improvements without requiring costly hardware. The limit of detection of the proposed device is 3 × 10− 5RIU.","PeriodicalId":31141,"journal":{"name":"Netcom","volume":"256 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75697614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-30DOI: 10.1109/OMN/SBFotonIOPC58971.2023.10230944
K. Lukin, E. Khutoryan, H. Cerdeira, A. Kuleshov, Lidia Yurchenko, S. Ponomarenko
Two promising methods for generation of THz radiation are presented and discussed. The hybrid bulk-surface modes excited in a cavity with bi-periodic grating have been considered. Such modes appear due to Electrodynamic interaction of the bulk modes with surface-wave resonator modes (i.e., leaky spoof surface plasmon polariton of an open grating). The potential for the effective generation of the THz radiation in a Clinotron by the excitation of the hybrid modes has been demonstrated. Theory of a new instability in reversed biased pn-junctions with impact ionization was developed and applied for investigation of THz oscillators design.
{"title":"Current Instabilities in Vacuum Electron Devices and Semiconductor Avalanche Diodes for Generation of THz Oscillations","authors":"K. Lukin, E. Khutoryan, H. Cerdeira, A. Kuleshov, Lidia Yurchenko, S. Ponomarenko","doi":"10.1109/OMN/SBFotonIOPC58971.2023.10230944","DOIUrl":"https://doi.org/10.1109/OMN/SBFotonIOPC58971.2023.10230944","url":null,"abstract":"Two promising methods for generation of THz radiation are presented and discussed. The hybrid bulk-surface modes excited in a cavity with bi-periodic grating have been considered. Such modes appear due to Electrodynamic interaction of the bulk modes with surface-wave resonator modes (i.e., leaky spoof surface plasmon polariton of an open grating). The potential for the effective generation of the THz radiation in a Clinotron by the excitation of the hybrid modes has been demonstrated. Theory of a new instability in reversed biased pn-junctions with impact ionization was developed and applied for investigation of THz oscillators design.","PeriodicalId":31141,"journal":{"name":"Netcom","volume":"13 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72503471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-30DOI: 10.1109/OMN/SBFotonIOPC58971.2023.10230981
H. J. B. de Oliveira, T. H. C. De Barros, Allamys A. D. Da Silva, J. F. do Nascimento, J. Martins-Filho
We present an investigation of a hetero-core fiber optic refractive index sensor that performs measurements under the 1550 nm wavelength for chemical and biological applications. The structure is formed by a no-core fiber (N CF) spliced to a multimode optical fiber at each of its ends, forming a Multimode / No-core fiber / Multimode (MNM) structure, where the NCF fiber is the sensing part of the structure. The simple and low-cost interrogation scheme uses a laser and a photodetector. The sensor is able to measure refractive index variations with a resolution of $9.93times 10^{-5}$ RIU.
{"title":"Refractive Index Sensor based on Hetero-core fiber Interrogated by a Laser/photodetector at 1550 nm","authors":"H. J. B. de Oliveira, T. H. C. De Barros, Allamys A. D. Da Silva, J. F. do Nascimento, J. Martins-Filho","doi":"10.1109/OMN/SBFotonIOPC58971.2023.10230981","DOIUrl":"https://doi.org/10.1109/OMN/SBFotonIOPC58971.2023.10230981","url":null,"abstract":"We present an investigation of a hetero-core fiber optic refractive index sensor that performs measurements under the 1550 nm wavelength for chemical and biological applications. The structure is formed by a no-core fiber (N CF) spliced to a multimode optical fiber at each of its ends, forming a Multimode / No-core fiber / Multimode (MNM) structure, where the NCF fiber is the sensing part of the structure. The simple and low-cost interrogation scheme uses a laser and a photodetector. The sensor is able to measure refractive index variations with a resolution of $9.93times 10^{-5}$ RIU.","PeriodicalId":31141,"journal":{"name":"Netcom","volume":"2014 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86647811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-30DOI: 10.1109/OMN/SBFotonIOPC58971.2023.10230979
Vitória Macedo Costa Brandão, R. Samad
We present the results of an electron spectrometer with an imaging system to determine the energy spectrum of laser accelerated electrons. The spectrometer is composed by a region with a constant magnetic field that deflects relativistic electrons according to their kinetic energy, and a luminescent screen into which the electrons impinge. The imaging system optimizes the collection of the screen luminescence, which is inside a vacuum chamber, and magnifies it, through a window, into a CCD in atmosphere that records the light pattern, from which the energy spectrum is recovered.
{"title":"Development of an Imaging System for an Electron Spectrometer for laser-accelerated electrons","authors":"Vitória Macedo Costa Brandão, R. Samad","doi":"10.1109/OMN/SBFotonIOPC58971.2023.10230979","DOIUrl":"https://doi.org/10.1109/OMN/SBFotonIOPC58971.2023.10230979","url":null,"abstract":"We present the results of an electron spectrometer with an imaging system to determine the energy spectrum of laser accelerated electrons. The spectrometer is composed by a region with a constant magnetic field that deflects relativistic electrons according to their kinetic energy, and a luminescent screen into which the electrons impinge. The imaging system optimizes the collection of the screen luminescence, which is inside a vacuum chamber, and magnifies it, through a window, into a CCD in atmosphere that records the light pattern, from which the energy spectrum is recovered.","PeriodicalId":31141,"journal":{"name":"Netcom","volume":"1 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81547732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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