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Статті в журналах з теми "Optical wave synthesis"

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Mills, D. W., and L. S. Tamil. "Synthesis of guided wave optical interconnects." IEEE Journal of Quantum Electronics 29, no. 11 (1993): 2825–34. http://dx.doi.org/10.1109/3.248942.

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Smokal, Vitaliy, Oksana Krupka, Aleksey Kolendo, Beata Derkowska, Robert Czaplicki, and Bouchta Sahraoui. "Synthesis, polymerization ability, nonlinear optical properties of methacrylic monomers and polymers with benzylidene moiety." Chemistry & Chemical Technology 1, no. 3 (2007): 131–35. http://dx.doi.org/10.23939/chcht01.03.131.

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New methacrylic monomers, their polymers with benzylidene fragment were synthesized. Structures of all compounds were determined by HNMR, UV- spectroscopies. The third order nonlinear optical properties of oxazolone, thiazolidinone and thiohydantoin containing compounds were investigated in solutions using degenerate four wave mixing (DFWM) method at 532 nm.
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Khaefi, Sara, Alireza Mallahzadeh, and Mohammad Hossein Amini. "Flat-topped pattern synthesis of optical leaky-wave antennas." Optics Communications 485 (April 2021): 126737. http://dx.doi.org/10.1016/j.optcom.2020.126737.

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Jiang, Zhi Hao, Jeremy P. Turpin, Kennith Morgan, Bingqian Lu, and Douglas H. Werner. "Spatial transformation-enabled electromagnetic devices: from radio frequencies to optical wavelengths." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 373, no. 2049 (2015): 20140363. http://dx.doi.org/10.1098/rsta.2014.0363.

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Transformation optics provides scientists and engineers with a new powerful design paradigm to manipulate the flow of electromagnetic waves in a user-defined manner and with unprecedented flexibility, by controlling the spatial distribution of the electromagnetic properties of a medium. Using this approach, over the past decade, various previously undiscovered physical wave phenomena have been revealed and novel electromagnetic devices have been demonstrated throughout the electromagnetic spectrum. In this paper, we present versatile theoretical and experimental investigations on designing tra
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Krishnamurthi, Vijay, Brent Bailey, and Frederick Lanni. "3-D optical transfer in excitation field synthesis microscopes." Proceedings, annual meeting, Electron Microscopy Society of America 53 (August 13, 1995): 64–65. http://dx.doi.org/10.1017/s0424820100136696.

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Excitation field synthesis (EFS) refers to the use of an interference optical system in a direct-imaging microscope to improve 3D resolution by axially-selective excitation of fluorescence within a specimen. The excitation field can be thought of as a weighting factor for the point-spread function (PSF) of the microscope, so that the optical transfer function (OTF) gets expanded by convolution with the Fourier transform of the field intensity. The simplest EFS system is the standing-wave fluorescence microscope, in which an axially-periodic excitation field is set up through the specimen by in
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Shaker, Reyhane, Alireza Mallahzadeh, and Mohammad Hossein Amini. "Low side-lobe level pattern synthesis of optical leaky-wave antennas." Optik 242 (September 2021): 167192. http://dx.doi.org/10.1016/j.ijleo.2021.167192.

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SENTHILKUMARAN, PARAMASIVAM, and FRANK WYROWSKI. "Phase synthesis in wave-optical engineering: mapping- and diffuser-type approaches." Journal of Modern Optics 49, no. 11 (2002): 1831–50. http://dx.doi.org/10.1080/09500340210140533.

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Foord, A. P., P. A. Davies, and P. A. Greenhalgh. "Synthesis of microwave and millimetre-wave filters using optical spectrum-slicing." Electronics Letters 32, no. 4 (1996): 390. http://dx.doi.org/10.1049/el:19960243.

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Inaba, H., T. Ikegami, Feng-Lei Hong, et al. "Phase locking of a continuous-wave optical parametric oscillator to an optical frequency comb for optical frequency synthesis." IEEE Journal of Quantum Electronics 40, no. 7 (2004): 929–36. http://dx.doi.org/10.1109/jqe.2004.830211.

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Wang, Jing-Sheng. "Newly Installed Radio and Optical Telescopes in China." Publications of the Astronomical Society of Australia 9, no. 1 (1991): 60–61. http://dx.doi.org/10.1017/s1323358000024899.

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AbstractNew radio and optical telescopes installed in recent years in China are summarised. These include the 2.16-m optical telescope, the solar magnetic field telescope, the Miyun synthesis radio telescope, the 1.26-m infrared telescope (Beijing Astronomical Observatory), the 25-m radio telescope as the first station of China’s VLBI network, the 1.56-m astrometric telescope (Shanghai Observatory), and the 13.7-m millimetre wave radio telescope.
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Дисертації з теми "Optical wave synthesis"

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Taylor, Christopher Trevor. "Enhancement of imagery from passive millimetre-wave systems for security scanning." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/enhancement-of-imagery-from-passive-millimetrewave-systems-for-security-scanning(7011ec7c-86ee-4770-b637-7ffe4909b241).html.

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This thesis concerns methods to enhance current and explore future radiometric imaging systems for security screening. Its main focus is on the test and calibration procedures for the BorderWatch system – an established 33 GHz passive millimetre-wave imager developed by QinetiQ PLC as an outdoor security scanning portal for soft-sided heavy goods vehicles at ports of entry. The effects of the limited size of the sky background reflector of the operational system are addressed and modifications to mitigate these effects are proposed. Systematic diurnal and seasonal variations in the receiver ou
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Nova, Lavado Enrique. "Millimeter-wave and terahertz imaging techniques." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/129466.

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This thesis presents the development and assessment of imaging techniques in the millimeterwave (mmW) and terahertz frequency bands. In the first part of the thesis, the development of a 94 GHz passive screener based on a total-power radiometer (TPR) with mechanical beamscanning is presented. Several images have been acquired with the TPR screener demonstrator, either in indoor and outdoor environments, serving as a testbed to acquire the know-how required to perform the research presented in the following parts of the thesis. In the second part of the thesis, a theoretical research on the pe
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Nebel, Paul. "Synthesis of optimal control of a wave energy converter." Thesis, University of Edinburgh, 1994. http://hdl.handle.net/1842/12708.

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The thesis begins by describing the experimental determination of the hydrodynamic coefficients of two test models; an Edinburgh duck and a semi-submerged, horizontal right circular cylinder. The impedance and wave force coefficient matrices are measured for these two models, and in the case of the cylinder are checked against exact analytical results. The radiation and scattering pattern matrices are also measured. Synthesis of optimal (complex-conjugate) control is achieved for the cylinder in one and two degrees-of-freedom, and for the duck in one, two and three degrees-of-freedom. Synthesi
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Ignacchiti, Jim. "Contrôle et caractérisation de la cohérence Raman induite par bruit quantique dans des fibres creuses remplies de gaz". Electronic Thesis or Diss., Limoges, 2024. http://www.theses.fr/2024LIMO0056.

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Ces travaux de thèse portent sur la conception, la mise en œuvre et l’utilisation d’une plateforme expérimentale et de simulations numériques visant à exciter et amplifier la cohérence Raman de façon contrôlée à partir du bruit quantique. L’objectif est d’explorer la diffusion Raman stimulée dans des fibres creuses comme un moyen de générer des peignes de fréquences optiques cohérents, avec une largeur spectrale multiple-octaves, et ainsi créer un outil pour produire des fonctions d’ondes optiques arbitraires, telles que des impulsions attosecondes ou des lasers à modes verrouillés. Le principe r
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Caba, Wilson Ariel. "Application of antenna synthesis and digital signal processing techniques for active millimeter-wave imaging systems." Doctoral diss., University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4532.

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Millimeter-wave imaging has gathered attention in recent years for its ability to penetrate clothing, thin layers of soils, and certain construction materials. However, image quality remains a challenge that needs to be addressed. One way of improving image quality is by increasing the dimensions of the collecting aperture. A sparse array can be used to synthesize a larger aperture with a limited set of relatively small detectors. In this research we design, build, and test a test-bed having an active source at 94 GHz and an array of coherent detectors, mounted on arms that extend radially on
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North, Jan Arthur. "Fourier image synthesis and slope spectrum analysis of deepwater, wind-wave scenes viewed at Brewster's angle /." Online version of thesis, 1989. http://hdl.handle.net/1850/11520.

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Bhatambrekar, Nishant. "Realizing a fractional volt half-wave voltage in Mach-Zehnder modulators using a DC biased push-pull method and synthesis and characterization of indole based NLO chromophores for improving electro-optic activity /." Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/11606.

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Phruksahiran, Narathep. "Polarimetrische Streuungseigenschaften und Fokussierungsmethoden zur quantitativen Auswertung der polarimetrischen SAR-Daten." Doctoral thesis, Universitätsbibliothek Chemnitz, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-107764.

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Das Radar mit synthetischer Apertur (Synthetic Aperture Radar - SAR) liefert eine quasi-fotographische Abbildung der beleuchteten Bodenoberfläche mit zusätzlichen Informationen, die von der gesendeten und empfangenen Polarisation der Wellen abhängig sind. Eine nützliche Anwendung der polarimetrischen SAR-Daten liegt bei der Klassifizierung der Bodenstruktur anhand der polarimetrischen Streuungseigenschaften. In diesem Zusammenhang beschäftigt sich die vorliegende Arbeit mit der Entwicklung und Untersuchung neuer polarimetrischen Fokussierungsfunktion für die SAR-Datenverarbeitung mit Hilf
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Kilicaslan, Amaury. "Etude spectroscopique d’un plasma micro-onde à la pression atmosphérique et son application à la synthèse de nanostructures." Thèse, 2014. http://hdl.handle.net/1866/10600.

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L’objectif de ce mémoire de maîtrise est de caractériser la distribution axiale des plasmas tubulaires à la pression atmosphérique créés et entretenus par une onde électromagnétique de surface ainsi que d’explorer le potentiel de ces sources pour la synthèse de matériaux et de nanomatériaux. Un précédent travail de thèse, qui avait pour objectif de déterminer les mécanismes à l’origine de la contraction radiale du plasma créé dans des gaz rares, a mis en lumière un phénomène jusque-là inconnu dans les plasmas d’onde de surface (POS). En effet, la distribution axiale varie différemment selon la
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Jarvis, Thomas William. "Novel tools for ultrafast spectroscopy." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-12-4456.

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Exciton dynamics in semiconductor nanostructures are dominated by the effects of many-body physics. The application of coherent spectroscopic tools, such as two-dimensional Fourier transform spectroscopy (2dFTS), to the study of these systems can reveal signatures of these effects, and in combination with sophisticated theoretical modeling, can lead to more complete understanding of the behaviour of these systems. 2dFTS has previously been applied to the study of GaAs quantum well samples. In this thesis, we outline a precis of the technique before describing our own experiments using 2dFTS
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Книги з теми "Optical wave synthesis"

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Biagini, Carlo, ed. L'Ospedale degli Infermi di Faenza. Firenze University Press, 2007. http://dx.doi.org/10.36253/978-88-8453-591-7.

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In view of its inevitable implications at an individual and collective level, in all historic periods hospital building has represented the most advanced level of elaboration of architectural models aimed at the optimal synthesis of form, function and technique. Consequently, the typological and morphological reading of the Ospedale degli Infermi of Faenza, in the wake of a campaign of architectural surveys and archive research, represents an opportunity for verifying the relationship between technical culture and design and building practice through which it is possible to identify the typolo
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Center, Langley Research, ed. A conceptual thermal design study of an electronically scanned thinned array radiometer. National Aeronautics and Space Administration, Langley Research Center, 1995.

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Towe, E., and D. Pal. Intersublevel quantum-dot infrared photodetectors. Edited by A. V. Narlikar and Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533060.013.7.

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This article describes the basic principles of semiconductor quantum-dot infrared photodetectors based on conduction-band intersublevel transitions. Sufficient background material is discussed to enable an appreciation of the subtle differences between quantum-well and quantum-dot devices. The article first considers infrared photon absorption and photon detection, along with some metrics for photon detectors and the detection of infrared radiation by semiconductors. It then examines the optical matrix element for interband, intersubband and intersublevel transitions before turning to experime
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4

Phase-Locked Frequency Generation and Clocking: Architectures and Circuits for Modern Wireless and Wireline Systems. Institution of Engineering & Technology, 2020.

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Частини книг з теми "Optical wave synthesis"

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Tamil, Lakshman S., and Arthur K. Jordan. "Synthesis of Optical Interconnects and Logic Gates." In Guided-Wave Optoelectronics. Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-1039-4_23.

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Shekhtman, V. N. "Synthesis of Interferograms by Lateral Shear to Measure Wave Front of a Light Beam." In Optical Resonators — Science and Engineering. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-017-2486-9_19.

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Saha, Swapan Kumar. "Introduction to Wave Optics." In Aperture Synthesis. Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-5710-8_1.

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Ohtsuki, Yukiyoshi, Yoshikazu Nishiyama, Tsuyoshi Kato, Hirohiko Kono, and Yuichi Fujimura. "Numerical Synthesis of Optimal Laser Pulses for Manipulating Dissociation Wave Packets of I2 − in Water." In Springer Series in Chemical Physics. Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-27213-5_156.

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Gorbunov, M. E. "Wave Optics Algorithms for Processing Radio Occultation Data in the Lower Troposphere: A Review and Synthesis." In Occultations for Probing Atmosphere and Climate. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-09041-1_2.

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Ramya, Emusani. "Green Synthesis of Metal Nanostructures and Its Nonlinear Optical Properties." In Nonlinear Optics [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99449.

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Simple green synthesis of metal nanoparticles (Ag NPs) was prepared by using Raphanussativus leaf extract. This extract acts as reduce and stabilizing agent. The formation of silver NPs was confirmed and characterized by XRD, UV–visible absorption spectrum, TEM, and FTIR. The luminescence enhancement and quenching of Eu3+and Sm3+ ions were observed in the presence of silver NPs. The luminescence enhancement is owing to arise in the electric-dipole transition with alteration of the field around Ln3+ ions. Nonlinear studies in femtosecond (fs) and picosecond (ps) time scales have been studied by
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Bairy, Raghavendra, Vijeth H., Rajesh K., and Rohan S. Deshmukh. "Synthesis and Characterization of CdS and ZnS Nanostructured Thin Films for Opto-electronic Energy Applications." In Thin Film Nanomaterials: Synthesis, Properties and Innovative Energy Applications. BENTHAM SCIENCE PUBLISHERS, 2024. http://dx.doi.org/10.2174/9789815256086124010004.

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Since their early discovery, thin films have quickly found industrial uses, including decorative, optical, and energy storage applications. The range of applications for thin film technology has expanded to the point where nearly every industrial sector now uses it to impart specific physical and chemical properties to the surface of bulk materials. The ability to customize film properties by varying the microstructure through the deposition parameters used in a particular deposition technique has recently allowed them to advance from the most basic applications, like protective coatings again
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Narasimman, Subramaniyam, Lakshmi Narayanan Balakrishnan, Arunkumar Chandrasekhar, and Zachariah C. Alex. "A Study on Fiber Optic Temperature Sensor Using Al2O3 as High Index Overlay for Solar Cell Applications." In Nanogenerators and Self-Powered Systems [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.110496.

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Recently, the performance of solar cell is impacted by rising panel temperatures. For solar cells to work at their best and have the longest possible useful life, the temperature of the panels must be kept at an ideal level. Current temperature sensors have a slow response time, poor accuracy, and low resolution. Meanwhile, Al2O3 and its derivatives have demonstrated a noteworthy role in temperature sensing applications due to its greater surface area, ease of synthesis, tailored optical characteristics, high melting point, and high thermal expansion coefficient. Al2O3-based nanoparticles have
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Xi, Xian, and Jiangqing Huang. "Seismic Scattering Wave Field Imaging Method Based on Convolution Neural Network and Equivalent Training Model." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220031.

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The inversion of scattered waves in seismic exploration is a hot and difficult problem in related fields. We propose a hypothesis: the local wave field near each point on the wave field profile has a relationship with the minimum distance between that point and each scatterer, and this relationship can be recognized by a convolutional neural network (CNN). Based on this, the designed CNN can steadily classify and identify the scattered wavefield point by point, and realize the inversion imaging of the scatterer. We propose a new method of inversion imaging of scattered wavefield based on CNN a
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Butt, Muhammad A. "Photonic Crystal Instruments." In Photonic Materials: Recent Advances and Emerging Applications. BENTHAM SCIENCE PUBLISHERS, 2023. http://dx.doi.org/10.2174/9789815049756123010004.

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 Photonic crystals (hereafter represented as PCs), a synthetic dielectric formation that employs periodic and random changes in the refractive index to control the transmission of light, were presented by Yablonovitch and John in 1987. The capability to change the transmission of the electromagnetic wave in these formations on a miniature scale is used by photonic devices built on PCs. Electromagnetic waves scatter within the PC, and destructive intrusion happens at particular wavelengths, resulting in a photonic bandgap like the energy bandgap of electron waves in a semiconductor (he
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Тези доповідей конференцій з теми "Optical wave synthesis"

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Morozov, Oleg G., rustam misbakhov, vadim artemiev, and Gennady Morozov. "Synthesis of symmetrical wave and phase address fiber Bragg structures." In Optical Technologies for Telecommunications 2023, edited by Oleg G. Morozov, Albert C. Sultanov, and Anton V. Bourdine. SPIE, 2024. http://dx.doi.org/10.1117/12.3026648.

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Yessenov, Murat, Oussama Mhibik, Tina M. Hayward, Rajesh Menon, Ivan Divliansky, and Ayman F. Abouraddy. "Compact synthesis setup for space-time wave packets." In Frontiers in Optics. Optica Publishing Group, 2024. https://doi.org/10.1364/fio.2024.jtu5a.32.

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We introduce an ultra-compact and robust system to generate space-time wave packets based on chirped volume Bragg gratings to spatially resolve the spectrum, which reduced the volume of the synthesis setup down to 25 × 25 × 8 mm3.
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Cui, Shaozhe, Zhe Peng, Yuanrui Dong, Yingwei He, Guojin Feng, and Haiyong Gan. "Aircraft detection in high-resolution synthetic aperture radar images based on optical training dataset." In Infrared, Millimeter-Wave, and Terahertz Technologies XI, edited by Masahiko Tani and Cunlin Zhang. SPIE, 2024. http://dx.doi.org/10.1117/12.3036454.

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Cornwall, Patrick W., Manuel Ballester, Stefan Forschner, Muralidhar Madabhushi Balaji, Aggelos Katsagelos, and Florian Willomitzer. "Computational light-in-flight imaging using synthetic waves." In Computational Optical Imaging and Artificial Intelligence in Biomedical Sciences II, edited by Liang Gao, Guoan Zheng, and Seung Ah Lee. SPIE, 2025. https://doi.org/10.1117/12.3043582.

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Kuś, Arkadiusz. "Dual-wavelength, near-infrared holographic tomography." In Digital Holography and Three-Dimensional Imaging. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/dh.2024.w4a.33.

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Dual wavelength interferometry has a long history and broad range of applications in optical measurements of objects, which exhibit phase steps greater than the single measurement wavelength [1–3]. The use of two measurements at slightly different wavelengths allows to extend the measurement range. In case of holographic tomography, the standard measurement of large samples such as organoids fails due to large refractive index differences and phase unwrapping errors. The application of synthetic wavelength allows to decrease the values of phase of the scattered wave for the synthetic wavelengt
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Lohmann, Adolf W., David Mendlovic, and Gal Shabtay. "Coherence function as carrier of optical information." In Signal Recovery and Synthesis. Optica Publishing Group, 1998. http://dx.doi.org/10.1364/srs.1998.swb.4.

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Haaland, Peter, and James Targove. "Flowing Afterglow Synthesis of Polythiophene Films." In Nonlinear Guided-Wave Phenomena. Optica Publishing Group, 1991. http://dx.doi.org/10.1364/nlgwp.1991.tue4.

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Polymers of aromatic heterocycles such as thiophene and pyrrole have been actively investigated for their promising electrical and optical characteristics. However the use of these materials in waveguide structures has been constrained by morphological and synthetic barriers. Specifically, larger oligomers are less soluble causing multiphase chemical kinetics and irregular morphology in the metal-catalyzed coupling syntheses.fi] Electrochemical preparation methods also produce grainy or fibrillar material, most probably because the heterogeneous boundary conditions on film growth change as ins
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Weiner, A. M., and J. P. Heritage. "Spectral Shaping of Ultrashort Pulses and its Application to Pulse Compression and Dark Optical Solitons." In Nonlinear Guided-Wave Phenomena. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/nlgwp.1989.thd6.

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Linear filtering is a widely applicable technique for manipulating spectral and temporal profiles of signals in any linear system. Powerful techniques for linear filtering of picosecond and femtosecond optical pulses have recently been developed; and as a result, synthesis of arbitrarily shaped ultrashort pulses has been achieved [1-5]. In this paper we describe two applications of ultrafast pulse shaping to nonlinear guided wave optics: (a) experimental demonstration of fundamental dark soliton propagation in optical fibers [6], and (b) extreme stabilization of optical pulse compression by st
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Ikeda, Osamu. "Proposal And Analysis Of Aberration-Free Array Imaging Using Phase Conjugation." In Signal Recovery and Synthesis. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/srs.1989.wb3.

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Анотація:
In this article, a signal-processing method is proposed to achieve diffraction-limited imaging of objects present in an aberrating medium. An array optical system is needed to acquire the data; some adaptive optics systems or optical fiber systems may be applicable for this purpose. The data are then processed in a computer, following the physical concept of repeated transmission of phase-conjugated wave, to find out the wave sharply focusing at a single point on the object. A mathematical analysis of the method does not guarantee the generation of such a sharp focal beam. Studies by computer
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10

Chen, L., W. Zhu, P. Huo, et al. "Arbitrary Space-time Wave Packet Synthesis." In CLEO: Applications and Technology. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_at.2022.jth6c.9.

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Анотація:
We demonstrate arbitrary spatiotemporal synthesis of ultrafast optical transients by leveraging the multifunctional control of light at the nanoscale offered by metasurfaces, enabling ready-synthesis of complex space-time wave packets over an ultrawide bandwidth.
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Звіти організацій з теми "Optical wave synthesis"

1

Hart, Carl, Gregory Lyons, and Michael White. Spherical shock waveform reconstruction by heterodyne interferometry. Engineer Research and Development Center (U.S.), 2024. http://dx.doi.org/10.21079/11681/48471.

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Анотація:
The indirect measurement of shock waveforms by acousto-optic sensing requires a method to reconstruct the field from the projected data. Under the assumption of spherical symmetry, one approach is to reconstruct the field by the Abel inversion integral transform. When the acousto-optic sensing modality measures the change in optical phase difference time derivative, as for a heterodyne Mach–Zehnder interferometer, e.g., a laser Doppler vibrometer, the reconstructed field is the fluctuating refractive index time derivative. A technique is derived that reconstructs the fluctuating index directly
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