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Journal articles on the topic 'Incoming and outgoing optical fibers'

Author: Grafiati

Published: 5 June 2025

Last updated: 16 July 2025

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1

Novikov, E. V., I. N. Altukhova, E. N. Koroleva, and A. V. Bezbabchenko. "Substantiation of Drying Modes for a New Universal Method of Short Flax Fiber Drying." Agricultural Machinery and Technologies 18, no. 4 (2024): 55–61. https://doi.org/10.22314/2073-7599-2024-18-4-55-61.

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Deep processing enterprises often receive short flax fibers with high moisture content, which must be dried to meet processing requirements. (Research purpose) To investigate the effect of process parameters (speed, drying agent consumption, air injection and vacuum, air temperature in the drying chamber) on the drying time of short and uniform flax fibers. (Materials and methods) The studies were conducted using a new drying unit with air recirculation. Flax fibers were pre-moistened to a moisture content of 35-40 percent and loaded into the working chamber. Before drying, and then at one-min

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Narendra Bihari and Ritesh Kumar Chourasia. "Comparative Optical Behaviour of High and Low Index Cladding Contrast Bragg Fiber." International Journal of Scientific Research in Science, Engineering and Technology 11, no. 6 (2024): 241–48. https://doi.org/10.32628/ijsrset2411452.

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We investigate and evaluate the optical performance of high- and low-RI cladding contrast Bragg fiber for two design wavelengths: 1550 nm (in the near-infrared region) and 632.8 nm (in the visible range). In order to establish a connection between the incoming and outgoing light waves using the transfer matrix technique, the boundary matching approach is used. Less periodic cladding layers are needed to create a perfect photonic band gap (PBG), and the measured PBG in high RI cladding contrast Bragg fiber (HRCCBF) are rather large. Both low refractive index and high refractive index spectra of

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Kuttybayeva, A., and A. Zhumagaziyev. "FULL SAPPHIRE FIBER OPTIC PRESSURE SENSOR FOR HIGH TEMPERATURE APPLICATIONS." POLISH JOURNAL OF SCIENCE, no. 58 (January 16, 2023): 63–65. https://doi.org/10.5281/zenodo.7540808.

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The article investigated a fully sapphire pressure sensor (SDD), for high-temperature applications, and optimized the ratio of components for high-temperature applications to achieve higher signal quality.

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De Leo, Stefano, Luca Maggio, and Moreno d’Ambrosio. "Goos–Hänchen Lateral Displacements and Angular Deviations: When These Optical Effects Offset Each Other." Photonics 9, no. 9 (2022): 643. http://dx.doi.org/10.3390/photonics9090643.

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For optical beams transmitted by a right-angle prism, the Goos–Hänchen shift can never be seen as a pure effect. Indeed, the lateral displacement, caused by the total internal reflection, will always be accompanied by angular deviations generated by the transmission through the incoming and outgoing interfaces. This combined effect can be analyzed by using the Taylor expansion of the Fresnel coefficients. The analytic expression found for the transmitted beam allows us to determine the beam parameters, the incidence angles, and the axial distance for which lateral displacements are compensated

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Kiesewetter, Dmitry V., and Nikita V. Ilyin. "Effect of speckle rotation on the interference of optical vortices and waveguide modes of an optical fiber." Journal of Optical Technology 91, no. 8 (2024): 515. https://doi.org/10.1364/jot.91.000515.

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Subject of study. This study investigates the interference of waveguide modes and optical vortices in multimode optical fibers and free space, as well as the speckle structures resulting from such interference. Aim of study. The aim of the study was to develop the simplest physical model to explain the phenomenon of speckle rotation formed by the outgoing radiation of a multimode fiber when the observation plane is shifted. Additionally, the study aims to estimate the parameters of speckle rotation based on experimental observations. Method. The research employed numerical simulations to analy

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Lubis, Wini Istya Sari, and Rakhmat Kurniawan. "Stock Information System for All Smartphone Brands Using Barcode." Journal of Dinda : Data Science, Information Technology, and Data Analytics 5, no. 1 (2025): 99–107. https://doi.org/10.20895/dinda.v5i1.1790.

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In the era of globalization, rapid development in technology that brings convenience and speed in completing human tasks. A barcode is a collection of optical data that is read by a machine. In fact, this barcode collects data in width (lines) and parallel line spacing and can be referred to as a linear or 1D (1-dimensional) barcode or symbology. Stock reports on purchases and sales of a period are useful for helping employees to assess the amount of inequality in purchasing flows, monitor stock/inventory of goods, and provide reports, both purchase reports, sales reports, and stock condition

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Alexeyev, C. N., S. S. Alieva, E. V. Barshak, B. P. Lapin, and M. A. Yavorsky. "Influence of attenuation on the generation of optical vortices in multihelicoidal optical fibers." Journal of Physics: Conference Series 2103, no. 1 (2021): 012149. http://dx.doi.org/10.1088/1742-6596/2103/1/012149.

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Abstract In this paper we have studied influence of attenuation on conversion processes of the fundamental mode (FM) in multihelicoidal optical fibers (MHF) in the vicinity of the point of accidental spectrum degeneracy within the framework of the scalar approximation. To this end, we have obtained expressions for modes of the MHF, which consist of the FM and an optical vortex (OV), and shown that conversion of the FM into the OV takes place. The difference in the attenuation coefficients for the partial fields of MHF’s modes leads to deterioration in the conversion process even with an ideal

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Lee, Yeon Ui, Igor Ozerov, Frédéric Bedu, Ji Su Kim, Frédéric Fages, and Jeong Weon Wu. "Optical spin-dependent beam separation in cyclic group symmetric metasurface." Nanophotonics 9, no. 10 (2020): 3459–71. http://dx.doi.org/10.1515/nanoph-2020-0160.

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AbstractCross-polarization scattering of a circularly polarized beam from nano-rod introduces a geometric phase to the outgoing beam with opposite circular polarization. By manipulating the spatial array of subwavelength nano-structure constituting metasurface, the geometric phase can be engineered to generate a variety of beam profiles, including vortex beam carrying orbital angular momentum via a process called spin-to-orbital angular momentum conversion. Here we introduce a cyclic group symmetric metasurface composed of tapered arc nano-rods and explore how azimuthal angular distribution of

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Schifano, Luca, Lien Smeesters, Thomas Geernaert, Francis Berghmans, and Steven Dewitte. "Design and Analysis of a Next-Generation Wide Field-of-View Earth Radiation Budget Radiometer." Remote Sensing 12, no. 3 (2020): 425. http://dx.doi.org/10.3390/rs12030425.

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Climate on Earth is determined by the Earth Radiation Budget (ERB), which quantifies the incoming and outgoing radiative energy fluxes. The ERB can be monitored by non-scanning wide field-of-view radiometers, or by scanning narrow field-of-view radiometers. We propose an enhanced design for the wide field-of-view radiometer, with as key features the use of a near-spherical cavity to obtain a uniform angular sensitivity and the integration of the shuttered electrical substitution principle, eliminating long term drifts of the radiometer and improving its time response. The target absolute accur

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Rede, Ishani. "Impediments Perception Assistant for Efficacious Assistive Locomotion for Purblind Personage." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (2021): 59–65. http://dx.doi.org/10.22214/ijraset.2021.34993.

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Visually impaired or partially blind people measure usually counts on exterior aid which could be delivered by humans, educated dogs, or completely different electronic appliances as backing techniques for the bigger psychological feature techniques. The most downside with blind individuals is that they navigate their path to where they need to travel. They usually need assistance from others. This project is determined to support the blind person to beat the deficit of visual ability, by victimization different senses like sound and bit. This project is determined to support the visually impa

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Makarieva, A. M., V. G. Gorshkov, and T. Pujol. "Height of convective layer in planetary atmospheres with condensable and non-condensable greenhouse substances." Atmospheric Chemistry and Physics Discussions 3, no. 6 (2003): 6701–20. http://dx.doi.org/10.5194/acpd-3-6701-2003.

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Abstract. Convection reduces greenhouse effect by transporting a certain amount of non-radiative dynamic energy to the upper atmosphere, where this energy dissipates and radiates into space without interaction with greenhouse substances in the lower atmosphere. In this paper we show that the height of the convective layer zc is finite and independent of atmospheric optical thickness τs at large values of the latter. We derive an analytical formula for zc at large values of τs for condensable and non-condensable greenhouse substances. The formula obtained yields reasonable quantitative estimate

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Antonov, Alexander A., and Maxim V. Gorkunov. "Dielectric Fourier metasurfaces as wide-angle Y-junction switches." Journal of Optics 23, no. 12 (2021): 125103. http://dx.doi.org/10.1088/2040-8986/ac3298.

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Abstract Dielectric Fourier metasurfaces—thin layers of strongly refracting transparent materials with periodic surface nanoreliefs—are capable of versatile flat-optical functionalities, including anomalous refraction in up to near-grazing directions. Describing the reliefs by a few Fourier coefficients, one can straightforwardly optimize them numerically or, eventually, analytically in terms of the Rayleigh hypothesis. We demonstrate that silicon Fourier metasurfaces supporting anomalous refraction in near-grazing directions can be employed as efficient optical Y-junction switches. Operating

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Li, Qin, and Kit Newton. "Diffusion Equation-Assisted Markov Chain Monte Carlo Methods for the Inverse Radiative Transfer Equation." Entropy 21, no. 3 (2019): 291. http://dx.doi.org/10.3390/e21030291.

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Optical tomography is the process of reconstructing the optical properties of biological tissue using measurements of incoming and outgoing light intensity at the tissue boundary. Mathematically, light propagation is modeled by the radiative transfer equation (RTE), and optical tomography amounts to reconstructing the scattering coefficient in the RTE using the boundary measurements. In the strong scattering regime, the RTE is asymptotically equivalent to the diffusion equation (DE), and the inverse problem becomes reconstructing the diffusion coefficient using Dirichlet and Neumann data on th

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Yuen, W. W. "Development of a Network Analogy and Evaluation of Mean Beam Lengths for Multidimensional Absorbing/Isotropically Scattering Media." Journal of Heat Transfer 112, no. 2 (1990): 408–14. http://dx.doi.org/10.1115/1.2910392.

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Based on Hottel’s zonal formulation, a network analogy is developed for the analysis of radiative transfer in general multidimensional absorbing/isotropically scattering media. Applying the analogy to the analysis of an isothermal medium and assuming that the incoming and outgoing flux density is homogeneous within the medium, the effect of scattering on the evaluation of mean beam lengths is illustrated. Two concepts of mean beam length, an absorption mean beam length (AMBL) and an extinction mean beam length (EMBL), are introduced and shown to be important for the analysis of radiative trans

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Bluvshtein, Nir, J. Michel Flores, Lior Segev, and Yinon Rudich. "A new approach for retrieving the UV–vis optical properties of ambient aerosols." Atmospheric Measurement Techniques 9, no. 8 (2016): 3477–90. http://dx.doi.org/10.5194/amt-9-3477-2016.

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Abstract. Atmospheric aerosols play an important part in the Earth's energy budget by scattering and absorbing incoming solar and outgoing terrestrial radiation. To quantify the effective radiative forcing due to aerosol–radiation interactions, researchers must obtain a detailed understanding of the spectrally dependent intensive and extensive optical properties of different aerosol types. Our new approach retrieves the optical coefficients and the single-scattering albedo of the total aerosol population over 300 to 650 nm wavelength, using extinction measurements from a broadband cavity-enhan

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Satheesh, S. K. "<i>Letter to the Editor</i> Aerosol radiative forcing over land: effect of surface and cloud reflection." Annales Geophysicae 20, no. 12 (2002): 2105–9. http://dx.doi.org/10.5194/angeo-20-2105-2002.

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Abstract. It is now clearly understood that atmospheric aerosols have a significant impact on climate due to their important role in modifying the incoming solar and outgoing infrared radiation. The question of whether aerosol cools (negative forcing) or warms (positive forcing) the planet depends on the relative dominance of absorbing aerosols. Recent investigations over the tropical Indian Ocean have shown that, irrespective of the comparatively small percentage contribution in optical depth ( ~ 11%), soot has an important role in the overall radiative forcing. However, when the amount of ab

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Mouftah, Hussein T. "Design of all Optical Packet Switching Networks." Sultan Qaboos University Journal for Science [SQUJS] 7, no. 1 (2002): 1. http://dx.doi.org/10.24200/squjs.vol7iss1pp1-10.

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Optical switches and wavelength converters are recognized as two of the most important DWDM system components in future all-optical networks. Optical switches perform the key functions of flexible routing, reconfigurable optical cross-connect (OXC), network protection and restoration, etc. in optical networks. Wavelength Converters are used to shift one incoming wavelength to another outgoing wavelength when this needs to be done. Always residing in optical switches, they can effectively alleviate the blocking probability and help solve contention happening at the output port of switches. The

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Gordeev, Georgy, Patryk Kusch, Benjamin S. Flavel, and Stephanie Reich. "(Invited) Raman Scattering By Exciton-Polaritons in Carbon Nanotubes." ECS Meeting Abstracts MA2022-01, no. 9 (2022): 740. http://dx.doi.org/10.1149/ma2022-019740mtgabs.

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Resonant Raman scattering has been used for decades to study single walled carbon nanotubes (CNTs), but lacks a consistent theory that simultaneously explains all characteristic signatures. We argue that a proper description requires introducing exciton polaritons as couples excitonic and photonic states. We describe the polaritons by waveguided theory for a nanometre thick cylinder with modified dielectric function. During their propagation along the tube, the polaritons scatter with phonons and are re-emitted as photons with smaller energy (Stokes scattering event). This approach consistentl

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Xu, Ronghui, Chengran Ke, Yipu Xue, et al. "Simultaneous Measurement of Refractive Index and Temperature Based on SMF–HCF–FCF–HCF–SMF Fiber Structure." Sensors 22, no. 22 (2022): 8897. http://dx.doi.org/10.3390/s22228897.

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In this research, we proposed and experimentally verified a compact all-fiber sensor that can measure refractive index (RI) and temperature simultaneously. Two segments of hollow-core fiber (HCF) are connected to the two ends of the four-core fiber (FCF) as a beam splitter and a coupler, and then spliced with two sections of single-mode fibers (lead-in and lead-out SMF), respectively. The two hollow-core fibers can excite the higher-order modes of the four-core fiber and recouple the core modes and higher-order modes into the outgoing single-mode fiber, thereby forming inter-mode interference.

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Barwig, H., and R. Schoembs. "A fiber-optic three-channel photometer for simultaneous UBVRI measurements - improved design and new results." Symposium - International Astronomical Union 118 (1986): 61–64. http://dx.doi.org/10.1017/s0074180900151022.

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A modern photometer designed for variable star observation should meet the following specifications: 1. Simultaneous measurements of object, comparison star and sky in order to allow compensation of changing atmospheric transparency and background radiation. 2. Simultaneous multicolor measurements of each channel yielding high efficiency and accurate colors. 3. Coverage of a large wavelength region (U-I) with high time resolution. A photometer, fitting these requirements has been designed at the Universitäts-Sternwarte München. In principle light from three sources in the focal plane of a tele

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Tsigaridis, K., Y. Balkanski, M. Schulz, and A. Benedetti. "Global error maps of aerosol optical properties: an error propagation analysis." Atmospheric Chemistry and Physics Discussions 8, no. 4 (2008): 16027–59. http://dx.doi.org/10.5194/acpd-8-16027-2008.

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Abstract. Among the numerous atmospheric constituents, aerosols play a unique role on climate, due to their scattering and absorbing capabilities, visibility degradation and their effect on incoming and outgoing radiation. The most important optical properties are the aerosol optical depth (AOD), the asymmetry parameter (g) and the single scattering albedo (SSA). Uncertainties in aerosol microphysics in global models, which in turn affect their optical properties, propagate to uncertainties on the effect of aerosols on climate. This study aims to estimate the uncertainty of AOD, g and SSA attr

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Jayeshlal, G. S., M. Satyanarayana, G. S. Motty, et al. "Lidar Studies on The Optical Characteristics of High Altitude Cirrus Clouds at A Low Latitiude Station, Gadanki (13.5°N , 79.2°E ) India." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-8 (November 27, 2014): 253–56. http://dx.doi.org/10.5194/isprsarchives-xl-8-253-2014.

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Light Detection and Ranging (LIDAR) which is analogous to Radio Detection And Ranging (RADAR), has become an important and unique technology for atmospheric research and applications. The technology is widely used for the remote sensing of the Earth’s atmosphere, oceans, vegetation and the characteristics of Earth’s topography. Remote sensing of atmosphere, for its structure, composition and dynamics, is one of the proven applications of the lidar systems. More importantly the lidar technique is applied for the study of clouds, aerosols and minor constituents in the atmosphere. It provides the

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Abdul Samad, Shakeeb M. A. N., Fahri Heltha, and M. Faliq. "The Study of Plate Number Recognition for Parking Security System." International Journal of Advanced Technology in Mechanical, Mechatronics and Materials 1, no. 3 (2020): 100–107. http://dx.doi.org/10.37869/ijatec.v1i3.34.

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Car Plate Number Recognition System is an important platform that can be used to identify a car vehicle identity. The Recognition System is based on image processing techniques and computer vision. A webcam is used to capture an image of the car plate number from different distance, and the identification is conducted through four processes of stages: Image Acquisition Pre-processing, Extraction, Segmentation, and Character Recognition. The Acquisition Pre-processing stage is extracted the region of interest of the image. The image is captured by live video of the webcam, then converted to gra

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Anselmi, Damiano. "Purely Virtual Particles in Quantum Gravity, Inflationary Cosmology and Collider Physics." Symmetry 14, no. 3 (2022): 521. http://dx.doi.org/10.3390/sym14030521.

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We review the concept of purely virtual particle and its uses in quantum gravity, primordial cosmology and collider physics. The fake particle, or “fakeon”, which mediates interactions without appearing among the incoming and outgoing states, can be introduced by means of a new diagrammatics. The renormalization coincides with one of the parent Euclidean diagrammatics, while unitarity follows from spectral optical identities, which can be derived by means of algebraic operations. The classical limit of a theory of physical particles and fakeons is described by an ordinary Lagrangian plus Hermi

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MacDonald, R. I. "Optoelectronic matrix switching." Canadian Journal of Physics 67, no. 4 (1989): 389–93. http://dx.doi.org/10.1139/p89-069.

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Because cross talk from electromagnetic coupling increases with frequency, it is difficult to design matrix switches for high-frequency electronic signals. Signals on optical carriers are easier to isolate but more difficult to switch. A hybrid technique exploiting passive optical-signal distribution and switching by optoelectronic effects shows good promise for high isolation matrices to handle signals in the dc to 10 GHz range. The key elements for such optoelectronic switches are optical detectors that have switchable sensitivity.Initial efforts in optoelectronic switching used silicon diod

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Meftah, Mustapha, Cannelle Clavier, Alain Sarkissian, et al. "Uvsq-Sat NG, a New CubeSat Pathfinder for Monitoring Earth Outgoing Energy and Greenhouse Gases." Remote Sensing 15, no. 19 (2023): 4876. http://dx.doi.org/10.3390/rs15194876.

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Climate change is undeniably one of the most pressing and critical challenges facing humanity in the 21st century. In this context, monitoring the Earth’s Energy Imbalance (EEI) is fundamental in conjunction with greenhouse gases (GHGs) in order to comprehensively understand and address climate change. The French Uvsq-Sat NG pathfinder mission addresses this issue through the implementation of a Six-Unit CubeSat, which has dimensions of 111.3 × 36.6 × 38.8 cm in its unstowed configuration. Uvsq-Sat NG is a satellite mission spearheaded by the Laboratoire Atmosphères, Observations Spatiales (LA

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Morrell, Frank, Walter W. Whisler, and Thomas P. Bleck. "Multiple subpial transection: a new approach to the surgical treatment of focal epilepsy." Journal of Neurosurgery 70, no. 2 (1989): 231–39. http://dx.doi.org/10.3171/jns.1989.70.2.0231.

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✓ A new operative approach has been designed for the relief of medically intractable focal epilepsy. It is intended particularly to be used in those cases where the epileptogenic lesion lies in “unresectable” cortex; that is, those cerebral regions subserving speech, memory, and primary motor and sensory function. The procedure is based upon experimental evidence indicating 1) that epileptogenic discharge requires substantial side-to-side or horizontal interaction of cortical neurons, and 2) that the major functional properties of cortical tissue depend upon the vertical fiber connections of t

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محمد الطرشي, سمية, سعاد محمد ابوزريبة та سعاد ابوالقاسم مجاور. "دراسة تأثير تشتت نمط الاستقطاب والفقد المعتمد على الاستقطاب على بارامترات الأداء في أنظمة اتصالات الألياف البصرية". مجلة العلوم الاساسية و التطبيقية, № 16 (25 серпня 2023): 102–10. https://doi.org/10.36602/jsba.2023.16.102.

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In this research, the effect of polarization dependent loss of signals entering fiber optic communication systems on the efficiency of the signals output through the model of wave carriers passing through single mode optical fibers was studied, taking into account the dispersion in the waves passing through the optical fiber caused by chromatic dispersion and the polarization pattern of the waves passing through the optical fiber according to the physical laws of fiber optic physics that work to show the signal coming out of the fiber optic communication system with a certain efficiency. This

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Rana, P., and V. Sathiyamoorthy. "INVESTIGATION OF CLOUDS AND CLOUD RADIATIVE FORCING ON THE WINDWARD SIDE OF THE MADAGASCAR MOUNTAIN CHAINS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-5 (November 27, 2018): 901–6. http://dx.doi.org/10.5194/isprs-archives-xlii-5-901-2018.

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<p><strong>Abstract.</strong> Clouds affect the radiative energy balance of the earth–atmosphere system by reflecting and trapping the radiation. The cooling occurs over the earth by reflecting the incoming solar radiation and warming by trapping the outgoing longwave terrestrial radiation. In this paper an attempt has been carried out to understand the clouds and cloud radiative forcing over the windward side of the Madagascar mountain chain. The study was carried out using the Clouds and Earth’s Radiant Energy System (CERES) data June&amp;ndash;September from 2000 to 20

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Jeong, G. Y., and T. Nousiainen. "TEM analysis of the internal structures and mineralogy of Asian dust particles and the implications for optical modeling." Atmospheric Chemistry and Physics Discussions 14, no. 5 (2014): 6619–61. http://dx.doi.org/10.5194/acpd-14-6619-2014.

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Abstract. Mineral dust interacts with incoming/outgoing electromagnetic radiation in the atmosphere. This interaction depends on the microphysical properties of the dust particles, including size, mineral composition, external morphology, and internal structure. Ideally all these properties should be accounted for in dust remote sensing, the modeling of single-scattering properties, and radiative effect assessment. There have been many reports on the microphysical characterizations of mineral dust, but no investigations of the internal structures or mineral composition of individual dust parti

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Jeong, G. Y., and T. Nousiainen. "TEM analysis of the internal structures and mineralogy of Asian dust particles and the implications for optical modeling." Atmospheric Chemistry and Physics 14, no. 14 (2014): 7233–54. http://dx.doi.org/10.5194/acp-14-7233-2014.

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Abstract. Mineral dust interacts with incoming/outgoing electromagnetic radiation in the atmosphere. This interaction depends on the microphysical properties of the dust particles, including size, mineral composition, external morphology, and internal structure. Ideally all of these properties should be accounted for in the remote sensing of dust, the modeling of single-scattering properties, and radiative effect assessment. There have been many reports on the microphysical characterizations of mineral dust, but no investigations of the internal structures of individual dust particles. We expl

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Lolli, Simone, Michaël Sicard, Francesco Amato, et al. "Climatological assessment of the vertically resolved optical and microphysical aerosol properties by lidar measurements, sun photometer, and in situ observations over 17 years at Universitat Politècnica de Catalunya (UPC) Barcelona." Atmospheric Chemistry and Physics 23, no. 19 (2023): 12887–906. http://dx.doi.org/10.5194/acp-23-12887-2023.

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Abstract. Aerosols are one of the most important pollutants in the atmosphere and have been monitored for the past few decades by remote sensing and in situ observation platforms to assess the effectiveness of government-managed reduction emission policies and assess their impact on the radiative budget of the Earth's atmosphere. In fact, aerosols can directly modulate incoming short-wave solar radiation and outgoing long-wave radiation and indirectly influence cloud formation, lifetime, and precipitation. In this study, we quantitatively evaluated long-term temporal trends and seasonal variab

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Islam, Naeemul, Anik Baul, Mohamed Fauzi Packeer Mohamed, Abu Bakkar Sakib, and Md Fokhrul Hasan. "Nearly Zero Ultra-Flattened Dispersion in Octagonal Photonic Crystal Fiber." Key Engineering Materials 946 (May 25, 2023): 67–72. http://dx.doi.org/10.4028/p-t45seq.

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The low confinement losses, relatively high nonlinearity, and wideband ultra-flattened chromatic dispersion are the crucial properties of the PCFs. Thus, in this research, a comprehensive study has been conducted to design a novel Octagonal PCF (Photonic Crystal Fiber) microstructure with an ultra-flattened dispersion profile through a vast range of optical communication band wavelengths with a large negative dispersion of nearly 0.6635 ps/nm/km at 1550 nm. This PCF design and simulative study have been made by using COMSOL multi-physics. The guiding features of the fiber have been analyzed nu

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Major, M. R., G. R. McKee, B. Geiger, et al. "Pedestal fluctuation measurements with charge exchange imaging at the DIII-D tokamak." Review of Scientific Instruments 93, no. 11 (2022): 113503. http://dx.doi.org/10.1063/5.0101844.

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A new high radial resolution 2D multichannel Charge eXchange Imaging (CXI) diagnostic is under development for deployment at DIII-D. The diagnostic system will measure low-to-intermediate radial wavenumber carbon density fluctuations by observing the n = 8 − 7 ( λ = 529.06 nm) C-VI emission line, resulting from charge exchange collisions between heating neutral beam atoms and the intrinsic carbon ion density. The new CXI diagnostic will provide measurements with Δ R ∼ 0.4 cm to access higher k r instabilities ( k r < 8 cm−1) predicted to arise in the steep-gradient region of the H-mode pede

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Margulis, W., F. C. Garcia, E. N. Hering, et al. "Poled Glasses." MRS Bulletin 23, no. 11 (1998): 31–35. http://dx.doi.org/10.1557/s0883769400030979.

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Glass is the most important material in optics, with uses in optical fibers, lenses, mirror substrates, and prisms. The silicate family, the prime material in this article, is well-suited for passive optical functions such as light guidance in a fiber. Because of its many desirable properties, one is tempted to use glass in active functions as well—such as in amplification and modulation of light. As early as the beginning of the 1960s, glasses doped with rare-earth ions were used as gain media for lasers. Nd:glass lasers and Erdoped fiber amplifiers are two examples of the success of the use

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Jeong, Gi Young, Mi Yeon Park, Konrad Kandler, Timo Nousiainen, and Osku Kemppinen. "Mineralogical properties and internal structures of individual fine particles of Saharan dust." Atmospheric Chemistry and Physics 16, no. 19 (2016): 12397–410. http://dx.doi.org/10.5194/acp-16-12397-2016.

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Abstract. Mineral dust interacts with incoming/outgoing radiation, gases, other aerosols, and clouds. The assessment of its optical and chemical impacts requires knowledge of the physical and chemical properties of bulk dust and single particles. Despite the existence of a large body of data from field measurements and laboratory analyses, the internal properties of single dust particles have not been defined precisely. Here, we report on the mineralogical organization and internal structures of individual fine ( < 5 µm) Saharan dust particles sampled at Tenerife, Canary Islands. The bulk o

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Каргин, Борис Александрович, Евгения Геннадьевна Каблукова, and Цюань Му. "Numerical stochastic simulation of optical radiation scattering by ice crystals of irregular random shapes." Вычислительные технологии, no. 2 (May 11, 2022): 4–18. http://dx.doi.org/10.25743/ict.2022.27.2.002.

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Перистая облачность является существенным источником неопределенности при построении численных моделей радиационного баланса Земли. В данной работе вычисляются индикатрисы рассеяния оптического излучения кристаллическими ледяными частицами нерегулярной формы на основе геометрической оптики с использованием метода трассировки лучей, что позволит дополнить оптические модели перистой облачности новыми данными. В качестве моделей ледяных частиц нерегулярной формы предлагается использовать многогранники, являющиеся выпуклыми оболочками случайного множества точек, распределенных по некоторому закону

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Shanin, Yu I. "Adaptive Optical Systems in Air-Based Laser System. Analytical Review. Part 1. Current Status." Mechanical Engineering and Computer Science, no. 4 (May 14, 2019): 1–23. http://dx.doi.org/10.24108/0419.0001464.

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Aviation-based laser complex is a complex technical object. Among its systems, we analyse only an adaptive optical system and issues related to its performance, and show that the effectiveness of the complex without an adaptive system is small. The analysis was carried out in terms of systems that were developed in the United States.Using the tilt corrector, an adaptive optics provides accurate tracking of the object. A deformable mirror performs correction of higher-order radiation wavefront aberrations caused by atmospheric turbulence for incoming light and outgoing laser radiation. The adva

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Shukla, Mayank, Sachin Sawant, Ashish Agrawal, Yogesh Kashyap, Tushar Roy, and Amar Sinha. "Laser produced thin metallic planar mini-flyer generation using fiber optic plate." Laser and Particle Beams 31, no. 2 (2013): 289–300. http://dx.doi.org/10.1017/s0263034613000256.

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AbstractLaser produced planar mini flyer generation has widely gained importance owing to its wide ranging applications in the field of condensed matter, astrophysics, material research, shock phenomenon, etc. Flattop smooth laser beam profile as driver is the primary requirement for planar flyer generation besides special multilayered target geometry. We present here laser produced thin metallic planar mini-flyer generation using a fiber optic plate (FOP) of 8 mm thickness and about 6 µm fiber dimension. This technique is unique in the sense that it doesn't require large length as compared to

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Thuillet, Florian, Yun Zhang, Patrick Michel, et al. "Numerical modeling of lander interaction with a low-gravity asteroid regolith surface." Astronomy & Astrophysics 648 (April 2021): A56. http://dx.doi.org/10.1051/0004-6361/201936128.

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Context. The JAXA asteroid sample return mission Hayabusa2 reached its target (162173) Ryugu in June 2018 and released the European (CNES-DLR) lander MASCOT in October 2018. MASCOT successfully landed on the surface, and the Hayabusa2 Optical Navigation Camera system has been able to image parts of the MASCOT trajectory. Aims. This work builds on our previous study of interactions between a landing package and a granular material in the context of MASCOT on Ryugu. The purpose is to expand our knowledge on this topic and to help constrain physical properties of surfaces by considering the actua

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Matveeva, M. V., A. A. Fedulina, A. V. Beltyukova, et al. "Investigation of the functioning of a neurohybrid system based on the FitzHugh–Nagumo radio generator and mouse hippocampal neurons." Genes & Cells 18, no. 4 (2023): 818–20. http://dx.doi.org/10.17816/gc623424.

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Currently, in the treatment of neurodegenerative diseases that are difficult to respond to drug therapy, electrical stimulation of the brain is performed through invasive intervention in damaged structures of the nervous tissue. The development and development of invasive technologies of closed-loop neural interfaces have made it possible to achieve great success in restoring neural connections, since they have finer and more precise stimulation settings that respond to changes in the physiological state, which is important in the process of restoring the functions of the nervous tissue. Advan

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МУРАШКИНА Т, И., А. БАДЕЕВ В, А. БАДЕЕВА Е та И. СЕРЕБРЯКОВ Д. "МЕТОДИКА КАЛИБРОВКИ ВОЛОКОННО-ОПТИЧЕСКОГО РЕФРАКТОМЕТРИЧЕСКОГО ДАТЧИКА". Приборы и системы. Управление, контроль, диагностика, № 8 (28 серпня 2024). https://doi.org/10.25791/pribor.8.2024.1515.

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Для обеспечения точности измерения показателей преломления жидкостей, качество которых определяется, все рефрактометрические средства измерений (РСИ) проходят процедуру калибровки для снижения погрешности градуирования, которая составляет до 70 % основной погрешности. В отдельных случаях требуется проводить процедуру калибровки в идеальных условиях, не допуская резких перепадов температуры, так как у жидкостей при повышении температуры значение показателя преломления уменьшается, а при понижении - увеличивается. Сложность и большая длительность процедуры калибровки снижает ценность известных Р

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Coleta da Conceição, Natan Aparecido, Brett V. Carlson, and Lionel W. (Bill) Poirier. "Quantum trajectories and the nuclear optical model." Physica Scripta, September 28, 2023. http://dx.doi.org/10.1088/1402-4896/acfe5d.

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Abstract In the context of nuclear scattering, we use the bipolar reduction of the Schr"odinger equation to examine the effects of optical model absorption on incoming and outgoing scattering waves.&#xD; We compare the exact solutions for these waves, obtained using a bipolar quantum trajectory-based formalism, with their approximate WKB counterparts. Aside from reducing the magnitudes of the incoming and outgoing waves, absorption smooths the variation of the potential at the turning point, reducing reflection in this region. This brings the incoming exact solution and WKB approximation i

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Indriyani, Indriyani, and Henni Novita Sari Hasibuan. "Optical Character Recognition For Invent And Outcome Management At The Batang Toru Camat Office, Tapanuli Selatan." Journal of Computer Science and Informatics Engineering (CoSIE), July 29, 2022, 146–52. http://dx.doi.org/10.55537/cosie.v1i3.74.

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The system for managing incoming and outgoing mail at the Batang TORU Camat Office, Selatan Tapanuli includes incoming letters, outgoing letters, archives, and so on. Archives are a source of information from various fields that will be stored in storage areas. The purpose of writing this final project report is to find out how to handle incoming and outgoing mail manually and computerized at the Batang Toru Camat Office, Selatan Tapanuli filling by using the application and knowing the handlers of hadrcopy documents into softcopy online using optical character recognition (OCR). This Final Pr

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Kadhim, Ibtihaj Ahmed, Samad Roshan Entezar, and Amir Madani. "Weyl semimetal assisted nonreciprocal modification of Flat-top optical pulses via defective photonic band-gap structures." Physica Scripta, January 4, 2024. http://dx.doi.org/10.1088/1402-4896/ad1ad7.

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Abstract We study the nonreciprocal modification of Flat-top optical pulses via a one-dimensional photonic band-gap structure with Weyl semimetal-based defect layers due to their wide range of applications, such as high-speed communication, nonlinear optical switching, and ultrafast pump-probe experiments. We apply the transfer matrix method to obtain the transmission spectrum of the structure. Also, the Fourier transform technique is used to investigate the effect of the propagation direction of the incoming pulse on the temporal profile of the outgoing pulse. Then we examine the impact of th

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Hassan, Arkan, and Julio Gea-Banacloche. "Input–output wavepacket description of two photons interacting with a V-type three-level atom in an optical cavity." AVS Quantum Science 5, no. 2 (2023). http://dx.doi.org/10.1116/5.0147934.

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We study the interaction of a V-type atom in a cavity with incident single- and two-photon wavepackets and derive an exact formula, valid in all parameter regimes, relating the spectrum of the outgoing wavepackets to the incident one. We present detailed results for several special input pulses and consider the potential performance of the system as a CPHASE gate for initial pulses in a product state. We find values of the cavity, atomic, and pulse parameters that yield a conditional phase shift of π, albeit with a relatively small overlap between the incoming and outgoing pulse forms.

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Grimm, Philipp, Gary Razinskas, Jer-Shing Huang, and Bert Hecht. "Driving plasmonic nanoantennas at perfect impedance matching using generalized coherent perfect absorption." Nanophotonics, April 26, 2021. http://dx.doi.org/10.1515/nanoph-2021-0048.

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Abstract Coherent perfect absorption (CPA) describes the absence of all outgoing modes from a lossy resonator, driven by lossless incoming modes. Here, we show that for nanoresonators that also exhibit radiative losses, e.g., plasmonic nanoantennas, a generalized version of CPA (gCPA) can be applied. In gCPA outgoing modes are suppressed only for a subset of (guided plasmonic) modes while other (radiative) modes are treated as additional loss channels - a situation typically referred to as perfect impedance matching. Here we make use of gCPA to show how to achieve perfect impedance matching be

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Smoliak, Brian V., Michel Gelobter, and Jeff T. Haley. "Mapping potential surface contributions to reflected solar radiation." Environmental Research Communications, June 20, 2022. http://dx.doi.org/10.1088/2515-7620/ac7a25.

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Abstract Modifying Earth’s albedo is one of the strategies considered to reduce its energy imbalance and slow global warming by reflecting solar energy. Atmospheric contributions to reflected solar radiation through stratospheric aerosols or cloud brightening have received considerable attention; however, the efficacy of surface interventions is less understood. We address this gap by estimating the potential for surface contributions to reflected solar radiation at approximately 30 km resolution using a simple radiative transfer model. Long-term average annual-mean incoming and outgoing top-o

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Kuster, Oliver, Yannick Augenstein, Roberto Narváez Hernández, Carsten Rockstuhl, and Thomas Jebb Sturges. "Inverse design of 3D nanophotonic devices with structural integrity using auxiliary thermal solvers." Nanophotonics, April 15, 2025. https://doi.org/10.1515/nanoph-2025-0067.

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Abstract 3D additive manufacturing enables the fabrication of nanophotonic structures with subwavelength features that control light across macroscopic scales. Gradient-based optimization offers an efficient approach to design these complex and non-intuitive structures. However, expanding this methodology from 2D to 3D introduces complexities, such as the need for structural integrity and connectivity. This work introduces a multi-objective optimization method to address these challenges in 3D nanophotonic designs. Our method combines electromagnetic simulations with an auxiliary heat-diffusio

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Chen, Weixiong, Lingfeng Chen, Xusheng Zhang, and Qinchao Zhang. "Geometrical aberration measurement by experimental ray-tracing based on fiber point diffraction interferometry." Measurement Science and Technology, June 27, 2022. http://dx.doi.org/10.1088/1361-6501/ac7c58.

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Abstract The geometrical aberration of an optical system is usually measured through wavefront aberration. We propose a very direct experimental ray-tracing measurement method in this paper. Two fiber point-light sources are used to simulate an arbitrary incident ray in space, the diffracting wavefronts of the two fibers pass through the lens under test and interfere on two photographic planes. The outgoing ray intersects the photographic planes at the extrema of their phase maps, thus can be traced by connecting the two intersections. We measure four kinds of geometrical aberrations of the le

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