Literatura científica selecionada sobre o tema "Ultra Stable Oscillator"
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Artigos de revistas sobre o assunto "Ultra Stable Oscillator"
Liu, Anni, Jian Dai e Kun Xu. "Stable and Low-Spurs Optoelectronic Oscillators: A Review". Applied Sciences 8, n.º 12 (14 de dezembro de 2018): 2623. http://dx.doi.org/10.3390/app8122623.
Texto completo da fonteLuiten, A. N., A. G. Mann, A. J. Giles e D. G. Blair. "Ultra-stable sapphire resonator-oscillator". IEEE Transactions on Instrumentation and Measurement 42, n.º 2 (abril de 1993): 439–43. http://dx.doi.org/10.1109/19.278600.
Texto completo da fonteLiu, Rui Hong, e Chih Hsiung Shen. "A High Resolution Vernier Ring Oscillator with Ultra-Low Temperature Drift". Advanced Materials Research 542-543 (junho de 2012): 795–99. http://dx.doi.org/10.4028/www.scientific.net/amr.542-543.795.
Texto completo da fonteSalzenstein, Patrice, Nathalie Cholley, Alexander Kuna, Philippe Abbé, Franck Lardet-Vieudrin, Ludvík Šojdr e Jacques Chauvin. "Distributed amplified ultra-stable signal quartz oscillator based". Measurement 45, n.º 7 (agosto de 2012): 1937–39. http://dx.doi.org/10.1016/j.measurement.2012.03.035.
Texto completo da fonteGalliou, S., e M. Mourey. "Temperature processing of an ultra stable quartz oscillator". IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control 48, n.º 6 (novembro de 2001): 1539–46. http://dx.doi.org/10.1109/58.971705.
Texto completo da fonteFluhr, C., B. Dubois, S. Grop, J. Paris, G. Le Tetû e V. Giordano. "A low power cryocooled autonomous ultra-stable oscillator". Cryogenics 80 (dezembro de 2016): 164–73. http://dx.doi.org/10.1016/j.cryogenics.2016.10.007.
Texto completo da fonteBourgeois, P. Y., Y. Kersalé, N. Bazin, M. Chaubet e V. Giordano. "Cryogenic opened cavity sapphire resonator for ultra-stable oscillator". Electronics Letters 39, n.º 10 (2003): 780. http://dx.doi.org/10.1049/el:20030509.
Texto completo da fonteGalliou, Serge, e Marc Mourey. "Electro-thermal simulation of an ultra stable quartz oscillator". International Journal of Thermal Sciences 41, n.º 2 (fevereiro de 2002): 173–81. http://dx.doi.org/10.1016/s1290-0729(01)01295-9.
Texto completo da fonteIKEGAMI, Takeshi, e Ken-ichi WATABE. "An Ultra-Stable Microwave Oscillator using a Cryogenic Sapphire Crystal Towards the Most Stable Oscillator on Earth". TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) 50, n.º 6 (2015): 322–29. http://dx.doi.org/10.2221/jcsj.50.322.
Texto completo da fontePeng, Jiankang, Liufeng Li e Lisheng Chen. "A spaceborne neodymium-doped yttrium aluminum garnet laser with nonplanar-ring-oscillator configuration". International Journal of Modern Physics A 36, n.º 11n12 (22 de março de 2021): 2140007. http://dx.doi.org/10.1142/s0217751x21400078.
Texto completo da fonteTeses / dissertações sobre o assunto "Ultra Stable Oscillator"
Mukherjee, Shambo. "Development of a Fabry-Pérot optical interferometer with low thermal and accelerometric sensitivities". Electronic Thesis or Diss., Bourgogne Franche-Comté, 2024. http://www.theses.fr/2024UBFCD023.
Texto completo da fonteThis thesis explores the development of a transportable, ultra-narrow linewidth laser integrating a high-finesse Fabry-Pèrot cavity made from ultra-low expansion glass with optically contacted Fused Silica mirrors, aiming to minimize thermal and mechanical perturbations and enhance frequency stability. A novel digital frequency stabilization method using an FPGA-based platform is introduced, targeting a fractional frequency stability of 1e-1 5 at 1-second integration. This approach contrasts traditional analog systems by offering increased stability and reduced complexity. The study also examines several limitations of ultra stable lasers like phase noise, thermal noise etc. and several approaches to mitigate these type of noise. Additionally, an optical frequency dissemination system using FPGA-based phaselocked loops and optical fiber links is detailed, ensuring stable signal transmission over laboratory distances
ISLAM, MOHAMMAD SAIFUL. "Reconfigurable RF and Wireless Architectures Using Ultra-Stable Micro- and Nano-Electromechanical Oscillators: Emerging Devices, Circuits, and Systems". Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1582167898995604.
Texto completo da fonteBelli, Alexandre. "Transfert de temps optique spatial (mission T2L2 / Jason-2) : applications et impacts en Géodésie". Thesis, Bourgogne Franche-Comté, 2017. http://www.theses.fr/2017UBFCD040/document.
Texto completo da fonteThe purpose of my Ph.D. works is the realization of a intercontinental time transfer,with a stability better than 2 ns over 10,000 s, between the International Laser RangingService (ILRS) geodetics observatories. This time transfer is performed thanks to optical spacelinks and the Time Transfer by Laser Link (T2L2) experiment. T2L2 is a passenger on-board theoceanographic satellite Jason-2, which was launched the 20th June 2008, at 1336 km of altitude.The principle of this experiment is based on the (two-way) short laser pulses (30 - 100 ps) timetagging, in laser station on ground and on-board the satellite, which come from 25 worldwidelaser stations. The high performance of the ground-to-space link (where the stability reach valuesbetter than 10 ps over 100 s), given by the laser technology in one hand, and the quality of thespace instrument in the other hand, allows to precisely read the frequency variations of the onboardoscillators (quartz) built for the orbitography and localization Doppler Orbitography andRadiopositionning Integrated by Satellite (DORIS) French system. We demonstrate the possibilityto build a deterministic frequency model, on the short term (10 days), mid-term (severalsmonth) for the on-board DORIS oscillator frequency evolution, with a relative precision at 3- 5·10≠13. Frequency variations are caused by a complex space environment, where radiations,temperature and device aging damage the oscillator. The integration of this model allows us tobuild an "on-orbit" time realization to synchronize the whole ILRS network and thus, estimatelaser station time biases in regard to the Universal Time Coordinate (UTC). The time bias effects,estimate thanks to T2L2, on the International Terrestrial Reference Frame (ITRF) stationcoordinates, is precisely determined at the level of a few millimeters. Finally, T2L2 is able totime tagged the Global Positionning System (GPS) Pulse Per Second (PPS) signal in order tostudy the clock long term (several years) behavior in laser station and we show the unexpectedproblems due to the instability of the station time and frequency system
Schneller, Luc. "Contributuion à l'élaboration d'un oscillateur ultra-stable spatial miniature: études et réduction de la sensibilité thermique". Besançon, 2009. http://www.theses.fr/2009BESA2051.
Texto completo da fonteThe current space context is marked by the desire to have more and more equipment in satellites. This requirement imposes a miniaturisation of embedded systems. The design of a new space oscillator has to respect this condition. For conception of a future miniaturised space Ultra Stable Oscillator (USO) – with relative frequency stability as low as <5. 10-13 for a one second integration time– a better understanding of the type of fabrication is necessary. The focus is on two aspects: the analysis of the thermal structure of the oscillator, and the development of a specific tool for mechanical and thermo mechanical simulation. 1/ Thermal analysis: a definition of the level of thermal regulation necessary to reach the required performance has been made. Then an analysis of thermal structure's key piece -a Dewar vessel- was made. An analytic model of the temperature profile in the Dewar was obtained with thermal heat transfer due to conduction and radiation. With this model sizing and performance of a small oscillator can be optimized. 2/ Mechanical and thermo mechanical simulation: the quartz wafer of the resonators which gives the oscillators frequency is very sensitive to mechanical stresses. The oscillator simulation tool has been built to calculate the relative frequency variation due to exterior perturbation and particularly temperature variation. This tool was used with the USO manufactured by Rakon France. A critical factor of the temperature sensitivity has been discovered. The solution derived from the simulation analysis to reduce temperature sensitivity results in the lower thermal sensitivity of an USO, an achievement previously unobtainable ( ≤ 3,2. 10-12 on temperature from –20 to +45°C)
Imbaud, Joël. "Evaluation des potentialités des matériaux du type langasite pour la réalisation d'oscillateurs ultra-stables : étude et réalisation préliminaires d'un oscillateur cryogénique". Besançon, 2008. http://www.theses.fr/2008BESA2018.
Texto completo da fonteThe present work is focused on improvement of ultra stable sources of frequencies over short averaging times (typically less than one minute). To do this, two-ways of investigations were selected. The first one deals with material capabilities of the langasite (LGS) family. A quality factor (Q) classification of LGS and langatate (LGT) materials according to their origin was confirmed. The first prototypes of bulk acoustic waves (BA W) resonators have been made in a high-Q LGT crystal. In this connection, a specific manufacturing process was developed. Oscillator electronics and thermal packaging adapted to the characteristics of these resonators have been designed. Finally, these first prototypes of oscillators have been characterized in terms of time-domain stability and in terms of aging. The second topic deals with the set-up of an experimental system. This system allows cooling of oscillators equipped with bulk acoustic waves (BAW) resonators at temperatures below that of liquid helium (4. 2 K). For that, quartz resonators of SC and LD cuts, and LGT crystal of y cuts have been characterized at low temperatures. Systematic measurements have revealed outstanding Q-factor coefficients for specific modes of vibration. Furthermore, different models of transistors have been tested and one of them has been modeled at cryogenic temperature. Then, two prototypes of oscillators equipped with SC cut resonators have been developed and tested at low temperatures. Results of this work give the first characterization of stability in the time-domain of such cryogenic oscillators
Imbaud, Joël. "Evaluation des potentialités des matériaux du type langasite pour la réalisation d'oscillateurs ultra-stables.Etude et réalisation préliminaires d'un oscillateur cryogénique". Phd thesis, Université de Franche-Comté, 2008. http://tel.archives-ouvertes.fr/tel-00360494.
Texto completo da fonte- La première concerne l'évaluation des potentialités des matériaux de la famille de la langasite (LGS). Une classification des coefficients de qualité (Q) des matériaux LGS et langatate (LGT) en fonction de leurs provenances a été mise en évidence. Les premiers prototypes de résonateurs à ondes de volume ont été réalisés dans un cristal de LGT à fort Q. A cette occasion un procédé de fabrication spécifique a été mis au point. Une électronique d'oscillateur et un packaging thermique adaptés aux caractéristiques de ces résonateurs ont été développés. Enfin, ces premiers prototypes d'oscillateurs ont été caractérisés en terme de stabilité temporelle et de vieillissement.
- La seconde voie exploratoire concerne la mise en place d'un ensemble expérimental permettant la réfrigération d'oscillateurs à résonateurs à ondes de volume à des températures inférieures à celles de l'hélium liquide (4,2K). Pour cela, des résonateurs en quartz de coupe SC et LD, et en LGT de coupe Y, ont été caractérisés à basses températures. Une campagne de mesures systématiques a révélé des coefficients de qualité exceptionnels pour certains modes de vibration. Par ailleurs, différents modèles de transistors ont été testés et l'une des références testées a été modélisée simplement, à température cryogénique. Deux premiers prototypes d'oscillateurs à résonateur à quartz de coupe SC ont été développés puis testés à basses températures. Il en résulte les toutes premières caractérisations en terme de stabilité temporelle.
Serge, DOS SANTOS. "Etude non linéaire et arithmétique de la synchronisation des systèmes : application aux fluctuations de basse fréquence des oscillateurs ultra-stables". Phd thesis, Université de Franche-Comté, 1998. http://tel.archives-ouvertes.fr/tel-00009255.
Texto completo da fontel'oscillateur ou la boucle à verrouillage de phase (PLL). Après un rappel de l'existence intrinsèque des non-linéarités de l'oscillateur, nous exposons les méthodes statistiques classiques de traitement du signal non linéaire (sections de Poincaré, espace des phases, mapping d'Arnold, arithmétique des résonances) sur le modèle de l'oscillateur de Van der Pol. Ce modèle (modèle
d'Adler ) permet l'étude de la PLL en régime non linéaire sur laquelle nous identifions des comportements multi-échelles de synchronisation et de régime transitoire à grande constantes de temps.
L'étude expérimentale est réalisée à partir de l'asservissement non linéaire de deux oscillateurs ultra-stables radiofréquence de 5 MHz en présence de bruit blanc de fréquence et d'une perturbation périodique issue du modulateur. Une transformation du bruit blanc en bruit en l/f (bruit flicker ou de scintillation) a lieu lorsque le système évolue dans un régime très non linéaire; résultats confirmés par intégrations numériques (Runge-Kutta). La vérification expérimentale des propriétés multi-échelles révèle une structure diophantienne du spectre d'intermodulation issue
des propriétés arithmétiques des fréquences. Cette approche arithmétique est également validée dans une expérience de résonance porteuse-enveloppe où l'on module une porteuse (97 MHz)
à partir de la détection de la réponse acoustique (300 kHz) d'une ligne à ondes de surface à ondes acousiques de surface (SAW). Les mèmes propriétés non linéaires (chaos, synchronisation,
escalier du diable, invariance d'échelle) du système sont identifiées.
Volyanskiy, Kirill. "Etudes spectrales du bruit de phase dans les oscillateurs opto-électroniques micro-ondes à ligne à retard". Phd thesis, Université de Franche-Comté, 2009. http://tel.archives-ouvertes.fr/tel-00392571.
Texto completo da fonteTrabalhos de conferências sobre o assunto "Ultra Stable Oscillator"
Tran, Dang-Bao-An, Giuseppe Marra e Patrick Gill. "Low-Phase-Noise Microwave Synthesis from Ultra-Stable Lasers Via a Frequency Comb as a Transfer Oscillator". In 2024 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR), 1–2. IEEE, 2024. http://dx.doi.org/10.1109/cleo-pr60912.2024.10676575.
Texto completo da fonteGrop, S., B. Dubois, P.-Y. Bourgeois, Y. Kersale, E. Rubiola, G. Haye e V. Giordano. "ULISS: AMobile cryogenic ultra-stable oscillator". In 2011 Joint Conference of the IEEE International Frequency Control and the European Frequency and Time Forum (FCS). IEEE, 2011. http://dx.doi.org/10.1109/fcs.2011.5977788.
Texto completo da fonteRodovalho, Luis Henrique, Eric Fabris e Hamilton Klimach. "Stable ring oscillator for ultra low supply voltages". In 2016 IEEE 7th Latin American Symposium on Circuits & Systems (LASCAS). IEEE, 2016. http://dx.doi.org/10.1109/lascas.2016.7451063.
Texto completo da fonteWallis, R. E., G. L. Weaver, M. J. Reinhart e Sheng Cheng. "An advanced synthesized ultra-stable oscillator for spacecraft applications". In 2005 IEEE Aerospace Conference. IEEE, 2005. http://dx.doi.org/10.1109/aero.2005.1559386.
Texto completo da fontePastor, Pablo Cancio, Roberto Eramo, Alessia Sorgi e Cecilia Clivati. "Ultra-Stable Optical Oscillator Transfer for Precise UV Spectroscopy". In 2018 IEEE International Frequency Control Symposium (IFCS). IEEE, 2018. http://dx.doi.org/10.1109/fcs.2018.8597544.
Texto completo da fonteOkusaga, Olukayode, John Hamilton, Trey Schmidt, Samuel Reynolds, Jeffery Garstecki e Gregory Weaver. "Ultra-Stable Oscillator Stabilization using an Artificial Neural Network". In 2022 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS). IEEE, 2022. http://dx.doi.org/10.1109/eftf/ifcs54560.2022.9850773.
Texto completo da fonteCibiel, Gilles, Bruno Boizot, Jean-jacques Boy, Jean-francois Carlotti, Olivier Cambon, Sabine Devautour-Vinot, Vincent Candelier et al. "Ultra stable oscillators dedicated for space applications: oscillator and quartz material behaviors vs radiation". In 2006 IEEE International Frequency Control Symposium and Exposition. IEEE, 2006. http://dx.doi.org/10.1109/freq.2006.275494.
Texto completo da fonteGrop, S., V. Giordano, P. Y. Bourgeois, N. Bazin, Y. Kersale, M. Oxborrow, G. Marra, C. Langham, E. Rubiola e J. DeVincente. "ELISA: An ultra-stable oscillator for esa deep space antennas". In 2009 Joint Meeting of the European Frequency and Time Forum (EFTF) and the IEEE International Frequency Control Symposium (FCS). IEEE, 2009. http://dx.doi.org/10.1109/freq.2009.5168204.
Texto completo da fonteKosov, A. S., V. M. Gotlib, V. M. Vald-Perlov e V. A. Zotov. "Ultra Stable Millimeter Wave Oscillator Intended for Space Project "Phobos - Grunt"". In 2008 Global Symposium on Millimeter Waves (GSMM 2008). IEEE, 2008. http://dx.doi.org/10.1109/gsmm.2008.4534610.
Texto completo da fonteSorgi, Alessia, Roberto Eramo e Pablo Cancio Pastor. "Ultra-Stable Optical Oscillator Transfer to the UV for Primary Thermometry". In 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE, 2019. http://dx.doi.org/10.1109/cleoe-eqec.2019.8871675.
Texto completo da fonte