Relevant bibliographies by topics / Sagnac effect

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Sagnac effect'

Author: Grafiati
Published: 4 June 2021
Last updated: 18 May 2024

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Journal articles on the topic "Sagnac effect"

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Persson, John-Erik. "The misunderstood Sagnac effect." Physics Essays 34, no. 4 (December 19, 2021): 480–85. http://dx.doi.org/10.4006/0836-1398-34.4.480.

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The Sagnac effect of first order (in one-way light) is shown to explain the aberration observed in the very long base interferometry tests. This fact is also consistent with Sagnac’s results and with the observed stellar aberration. The Sagnac effect of second order (in two-way light) is shown to be real, but not observable, in the experiments that were done by Michelson and Morley. However, it is also shown that the same second order effect is observable in the Pioneer anomaly. The Doppler effect of second order is also demonstrated to explain the cosmic red shift, due to a radial ether wind.
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Hasselbach, F., and M. Nicklaus. "Phase Shift of Electron Waves in A Rotating Frame of Reference." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 1 (August 12, 1990): 212–13. http://dx.doi.org/10.1017/s0424820100179816.

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After the first matter wave version of Sagnac’s classical light optical experiment of 1913, performed by Mercereau and Zimmermann with electron Cooper pairs in 1965, and the Sagnac experiment realized with neutrons by Werner et al. in 1979 , we report here on the first observation of the rotational phase shift of electron waves in vacuum.Theory. The Sagnac effect links classical physics, quantum physics and relativity. Using the special theory of relativity it can be derived that coherent waves, e.g. of light, neutrons or electrons, travelling around a finite area A experience a relative phaseshift
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Lin, Weihao, Yuhui Liu, Yibin Liu, Perry Ping Shum, and Mang I. Vai. "Fiber Temperature Sensor Based on Vernier Effect and Optical Time Stretching Method." Micromachines 13, no. 12 (December 14, 2022): 2215. http://dx.doi.org/10.3390/mi13122215.

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A novel method for ultra-sensitive and ultra-fast temperature sensing has been successfully implemented by cascading Saganc rings to generate the Vernier effect and doing the same dispersive fibers to achieve the optical time-stretching effect. This is different from the traditional point fiber sensor demodulated by optical spectrum analyzer (OSA) whose demodulation speed is usually at the second level. The designed system maps the wavelength domain to the time domain through the dispersive fiber, which can realize the ultra-fast temperature monitoring at the nanosecond level. The cascaded Sagnac ring is composed of polarization maintaining fiber (PMF) which is significantly affected by the thermal-optical coefficient. When the temperature changes, the variation is as high as −6.228 nm/°C, which is 8.5 times higher than the sensitivity based on the single Sagnac ring system. Furthermore, through the optical time stretching scheme, the corresponding response sensitivity is increased from 0.997 ns/°C to 7.333 ns/°C, and the magnification is increased 7.4 times with a response speed of 50 MHz.
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RAYCHAUDHURI, B. "SAGNAC EFFECT IN (2+1)-DIMENSIONAL GRAVITATIONAL FIELD." Modern Physics Letters A 29, no. 03 (January 27, 2014): 1450014. http://dx.doi.org/10.1142/s021773231450014x.

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A Sagnac type experiment is analyzed in the most well-known (2+1)-dimensional Bañados, Teitelboim and Zanelli (BTZ) spacetime and discussed vis-a-vis corresponding results in (3+1)-dimensional spacetime. The angular velocity of locally non-rotating observer has formally been predicted using Sagnac effect. Occurrence of arbitrarily large Sagnac delay (SD) for geodesic motion is observed for extreme BTZ black hole universally as its remarkable feature.
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Mei, Xiaochun. "The Truth of the Experiments of Invariable Speed of Light in Special Relativity." Applied Physics Research 15, no. 2 (October 19, 2023): 116. http://dx.doi.org/10.5539/apr.v15n2p116.

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It is pointed out that the most experiments on the invariant speed of light in special relativity proves the round-trip invariant speed of light, not one-way invariant. This paper makes a distinction between them. The Michelson-Morley experiment and the experiment of high-energy particles emitting photons and so on are the round-trip experiment of light’s speed, showing that the average speed of light is a constant. But the Sagnac effect experiment, the Michelson-Gale's experiment that the earth's rotation effects the speed of light, and the satellite signal propagation between China and Japan are the one-way experiments of light’s speed, showing that the speed of light is variable, satisfying the Galilean velocity addition rule. The orbit shape changes of binary stars and the phenomenon of charm stars cannot be observed due to that the calculated observing directions are different from the practical observing direction for the observers on the Earth. The Fizeau water flow experiment and the Sagnac experiment are combined to prove that the rotation of optical fiber would affects the speed of light. The problem that the Sagnac effect is independent of the refractive index of optical fiber is explained well. It is proved that the Sagnac effect formula derived from special relativity is consistent with that derived from classical mechanics when the optical fiber’s refractive index . When , there is no the Sagnac effect according to special relativity. While according to classical mechanics, there is the Sagnac effect. The original experiment of Sagnac effect in 1913 was carried out in atmosphere with . Therefore, the original Sagnac experiment became a judgment experiment. It certainly jugated that the velocity of light satisfied the Galilean addition rule rather than the Lorentz transformation formula.
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Winterberg, F. "Substratum Interpretation of the Sagnac-and the Aharonov-Bohm Effect." Zeitschrift für Naturforschung A 44, no. 12 (December 1, 1989): 1145–50. http://dx.doi.org/10.1515/zna-1989-1202.

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Abstract It is shown that a substratum interpretation reveals a close relationship between the Sagnac- and the Aharonov-Bohm-effect. The characteristic peculiarity of the Aharonov-Bohm-effect, to produce a phase shift of the electron wave function even in the absence of any electromagnetic force fields, can be duplicated by a thought experiment for light waves in the gravitational field of a massive rotating cylinder, which demonstrates that the somewhat similar Sagnac-effect is not caused by centrifugal and Corioli’s forces, as it is sometimes claimed. In the substratum interpretation, both the Sagnac and Aharonov-Bohm effect find their explanation in a rotational motion of the substratum. If the substratum flow is irrotational, having the form of a potential vortex, these effects persist even though there are no force fields present.
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Stávek, Jiří. "ChatGPT on the Sagnac Effect." European Journal of Applied Physics 6, no. 2 (March 20, 2024): 19–25. http://dx.doi.org/10.24018/ejphysics.2024.6.2.307.

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This is my first attempt to communicate with the ChatGPT on the Sagnac effect. ChatGPT reviewed the history of this effect, responded with a list of important scholars in this field of research, gave a list of the most stimulating papers and mentioned also a list of alternative interpretations of the Sagnac effect together with some papers not so often cited. ChatGPT gave some proposals for future research in this field, how to penetrate deeper to the core of this effect. This could be a quick start in this field for newcomers.
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Zhu, X. D., E. K. Ko, G. Kimbell, and J. Robinson. "An optimized scheme for detecting magneto-optic effects in ultrathin films with Sagnac interferometry." Review of Scientific Instruments 93, no. 9 (September 1, 2022): 093101. http://dx.doi.org/10.1063/5.0090061.

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Sagnac interferometry is advantageous in measuring time-reversal-symmetry breaking effects in ferromagnetic and antiferromagnetic materials as it suppresses time-reversal symmetric birefringent effects that are ubiquitous and often overwhelming in optical detection systems. When its sensitivity is limited only by the amplifier noise in the photo-detector, one needs to optimize the optical power that returns to the detector. We demonstrate an experimental scheme that maximizes the returning optical power in a Sagnac interferometry when detecting the magneto-optic effect in ultrathin films. In this scheme, the optical beam bearing the Faraday effect on a thin film is reflected at a second surface coated with a highly reflective gold film. The gold film increases the returned optical power by a factor of 4–5. For a normal-incidence Sagnac interferometer, this scheme yields an increase in the signal-to-noise ratio by the same factor. For an oblique-incidence Sagnac interferometer, this scheme should yield an increase in the signal-to-noise ratio by a factor of 20–25. For illustration, this scheme is used to measure magnetization curves and Kerr rotation images of 4.5-unit-cell thick SrRuO3(001) grown on SrTiO3(001).
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Petrov, B. M. "Electrodynamic Theory of Sagnac Effect." Radioelectronics and Communications Systems 53, no. 10 (October 2010): 511–20. http://dx.doi.org/10.3103/s0735272710100018.

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Kajari, E., R. Walser, W. P. Schleich, and A. Delgado. "Sagnac Effect of Gödel's Universe." General Relativity and Gravitation 36, no. 10 (October 2004): 2289–316. http://dx.doi.org/10.1023/b:gerg.0000046184.03333.9f.

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Dissertations / Theses on the topic "Sagnac effect"

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RayChaudhuri, Biplab. "Conceptual questions in relativistic sagnac effect and related issues." Thesis, University of North Bengal, 2005. http://hdl.handle.net/123456789/609.

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Altorio, Matteo. "Novel atom interferometry techniques for a cold-atom gyroscope of large Sagnac area Atom interferometry with top-hat laser beams Improving the phase response of an atom interferometer by means of temporal pulse shaping." Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS449.

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Cette thèse décrit la mise en œuvre de nouvelles techniques d'interférométrie atomique améliorant la stabilité et l’exactitude d'un gyromètre à atomes froids situé au laboratoire SYRTE. Des transitions Raman stimulées permettent de séparer et recombiner les ondes atomiques. Une séquence de quatre impulsions lumineuses génère un interféromètre avec une aire Sagnac de 11 cm2. Je présente la mise en œuvre d'un schéma d'interrogation entrelacé dans un interféromètre dont le temps d'interrogation est de 801 ms, dans lequel trois nuages atomiques sont interrogés simultanément résultant en une cadence de mesure de 3,75 Hz. Avec ce schéma, nous démontrons une sensibilité de 30 nrad/s/sqrt(Hz). Nous présentons ensuite des mesures de rotation dynamiques dans une plage jusqu'ici inexplorée pour un capteur à atomes froids. Un biais important du capteur provient d'un couplage entre un désalignement relatif des miroirs rétroréfléchissant les faisceaux Raman et la trajectoire de l'atome. Une technique est introduite pour réduire ce biais au niveau de 3 nrad/s et atteindre une stabilité à long terme de 0,3 nrad/s qui représente l'état de l'art des gyromètres atomiques. Le manuscrit décrit ensuite la première caractérisation du facteur d'échelle du gyromètre à l'aide de différentes techniques. En particulier, la mise en place d’une plateforme de rotation sous le capteur permet de faire varier la projection du vecteur rotation de la Terre sur l'interféromètre et donc de moduler le déphasage de rotation. Les techniques présentées dans cette thèse ouvrent la voie à un test de l'effet Sagnac pour les ondes de matière avec une précision relative inférieure à 100 parties par million
This thesis describes the implementation of new atom interferometry techniques to improve the stability and accuracy of a cold-atom gyroscope located at the SYRTE laboratory. Stimulated Raman transitions are used to split and recombine the atomic waves. A sequence of four light pulses generates an interferometer with a Sagnac area of 11 cm2. I present the implementation of an interleaved interrogation scheme, where three atomic clouds are interrogated simultaneously in an atom interferometer featuring a sampling rate of 3.75 Hz and an interrogation time of 801 ms. With this scheme we demonstrate a short-term sensitivity of 30 nrad·s-1·Hz-1/2. We then present measurements of dynamic rotation rates in a so far unexplored range for a cold atom sensor. An important bias of the sensor originates from a coupling between a relative misalignment of the mirrors which retro-reflect the Raman beams and the trajectory of the atom. A technique is introduced to reduce this bias at the level of 3 nrad·s-1 and to achieve a long-term stability of 0.3 nrad·s-1 which represents the state of the art for atomic gyroscopes. The manuscript then describes the first characterization of the scale factor of the gyroscope using different techniques. In particular, the implementation of a rotation stage below the sensor enables us to vary the projection of the Erath rotation rate vector onto the interferometer area and therefore to modulate the rotation phase shift. The implementation of the techniques presented in this thesis pave paving the way to a test of the Sagnac effect for matter waves with a relative accuracy level below 100 parts per million
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Kurth, Martin Lyndon. "Scattering of guided waves in thick gratings at extreme angles." Thesis, Queensland University of Technology, 2006. https://eprints.qut.edu.au/16347/1/Martin_Kurth_Thesis.pdf.

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The aim of this project was to develop a passive optical compensating arrangement that would allow the formation and continued stability of interference patterns over a long timescale and also to investigate optical wave scattering in thick gratings at extreme angles of scattering. A novel passive arrangement based on a Sagnac interferometer is described that produces interference patterns more stable than those produced by a conventional arrangement. An analysis of the arrangement is presented that shows it to be an order of magnitude more stable than an equivalent conventional approach. The excellent fringe stability allowed holographic gratings with small periods (~ 0.5 μm) to be written in photorefractive lithium niobate with low intensity writing fields (~mW/cm2) produced by a He:Ne laser, despite long grating fabrication times (~ 1000 s). This was possible because the optical arrangement compensated for phase shifts introduced by translational and rotational mirror motion caused by environmental perturbations. It was shown that the rapid introduction of a phase shift in one of the writing fields can change the direction of energy flow in the two-wave mixing process. It was found that the improvement in stability of the modified Sagnac arrangement over a conventional interferometer decreased when the crossing angle was increased and that the point about which the mirrors are rotated greatly affects the stability of the arrangement. For a crossing angle of 12 degrees, the modified Sagnac arrangement is more than twice as stable when the mirrors are rotated about their midpoints, rather than their endpoints. Investigations into scattering in the extremely asymmetrical scattering (EAS) geometry were undertaken by scattering light from a 532nm Nd:YAG laser off gratings written in photorefractive barium titanate and lithium niobate. Despite the difficulties posed by background noise, there was very good agreement between the observed scattered field and that predicted by a previously established theoretical model. Thus, this work represents the first experimental observation of EAS in the optical part of the spectrum.
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Kurth, Martin Lyndon. "Scattering of guided waves in thick gratings at extreme angles." Queensland University of Technology, 2006. http://eprints.qut.edu.au/16347/.

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The aim of this project was to develop a passive optical compensating arrangement that would allow the formation and continued stability of interference patterns over a long timescale and also to investigate optical wave scattering in thick gratings at extreme angles of scattering. A novel passive arrangement based on a Sagnac interferometer is described that produces interference patterns more stable than those produced by a conventional arrangement. An analysis of the arrangement is presented that shows it to be an order of magnitude more stable than an equivalent conventional approach. The excellent fringe stability allowed holographic gratings with small periods (~ 0.5 μm) to be written in photorefractive lithium niobate with low intensity writing fields (~mW/cm2) produced by a He:Ne laser, despite long grating fabrication times (~ 1000 s). This was possible because the optical arrangement compensated for phase shifts introduced by translational and rotational mirror motion caused by environmental perturbations. It was shown that the rapid introduction of a phase shift in one of the writing fields can change the direction of energy flow in the two-wave mixing process. It was found that the improvement in stability of the modified Sagnac arrangement over a conventional interferometer decreased when the crossing angle was increased and that the point about which the mirrors are rotated greatly affects the stability of the arrangement. For a crossing angle of 12 degrees, the modified Sagnac arrangement is more than twice as stable when the mirrors are rotated about their midpoints, rather than their endpoints. Investigations into scattering in the extremely asymmetrical scattering (EAS) geometry were undertaken by scattering light from a 532nm Nd:YAG laser off gratings written in photorefractive barium titanate and lithium niobate. Despite the difficulties posed by background noise, there was very good agreement between the observed scattered field and that predicted by a previously established theoretical model. Thus, this work represents the first experimental observation of EAS in the optical part of the spectrum.
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Yver, Leduc Florence. "Caractérisation d'un capteur inertiel à atomes froids." Paris 11, 2004. https://tel.archives-ouvertes.fr/tel-00007729.

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Depuis les developpements des techniques de refroidissement d'atomes, les applications des ondes de matiere sont nombreuses. On presente la premiere realisation d'un gyrometre fonctionnant sur des ondes associees a des atomes froids, dans le but d'atteindre une sensibilite et une stabilite inegalees. L'appareil, base sur l'effet sagnac, est un interferometre atomique dont les separatrices et miroirs sont realises a l'aide d'impulsions lasers induisant des transitions raman stimulees aux nuages d'atomes froids de cesium. En sortie de l'interferometre, le dephasage depend de la vitesse de rotation et de l'acceleration de l'appareil. On utilise alors deux sources atomiques contrapropageantes afin de discriminer l'acceleration de la rotation. Une geometrie novatrice permet de reduire les dephasages parasites dus aux aberrations des optiques, en retroreflechissant les faisceaux lasers realisant les separatrices. L'obtention d'un premier signal et sa caracterisation sont presentees dans cette these. Grace a la mise en place d'un systeme d'isolation des vibrations, les sensibilites obtenues sur une seconde sont de 2,2. 10-6 rad. S-1 pour la rotation et 6,2. 10-6 m. S-2 pour l'acceleration. Cette premiere caracterisation a mis en evidence la principale limite actuelle de l'appareil, qui est le nombre d'atomes utiles. Diverses modifications sur l'experience permettront d'ameliorer ce point. Par ailleurs, un nouvel interferometre a ete teste, fournissant une mesure de l'axe de rotation horizontal perpendiculaire aux faisceaux lasers, habituellement inaccessible. Cette geometrie ouvre la voie a de nouveaux types de gyrometres, de tres hautes sensibilite et stabilite
Since recent developments in atom cooling techniques, matter wave applications are numerous. We present the first realization of a rate-gyroscope based on matter-waves associated to cold atoms, in order to reach high sensitivity and stability. The setup, based on the sagnac effect, is an atom interferometer where beam splitters and mirrors are realized with lasers pulses inducing stimulated raman transitions. At the interferometer output, the phase shift between the two arms depends both on accelerations and rotations. We then use two counterpropagating atomic sources in order to discriminate between rotation and acceleration. We test a new geometry for the laser beams, based on the lasers retroreflection, in order to reduce spurious phase shifts due to wavefront distorsions. The characterization of the first interferometric signal obtained with this setup is presented in this document. Thanks to the implementation of a vibration isolation system, sensitivities obtained after one second are 2,2. 10-6 rad. S-1 for rotation et 6,2. 10-6 m. S-2 for acceleration. This first characterization revealed the main limitation of the setup, which is presently the number of useful atoms. Further modifications on the experiment will improve this point. Moreover, a new interferometer was tested, which presents a sensitivity to the rotation axis parallel to the atomic mean direction. This geometry opens possibilities for a new type of rate-gyroscopes, with very high sensitivity and stability
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Skalský, Michal. "Snímač úhlové rychlosti se Sagnacovým interferometrem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-240886.

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This thesis deals with theoretical description of fiber-optic angular velocity sensors, or gyroscopes, and further with design and construction of own sensor of this type. The theoretical part describes problematics of interferometric and resonant fiber-optic gyroscopes. Basic principles and physical limits are described for both types. The main focus is then put on analysis of possible conceptions of these sensors. Solutions using different optical configurations as well as various modulation and signal processing schemes are discussed. The practical part deals with design and construction of own interferometric fiber-optic gyroscope in closed-loop configuration. The gyroscope utilizes all-fiber components including piezoelectric phase modulator and unexpensive single-mode fiber, which are commonly used only for open-loop configurations. To realize closed-loop operation, special modulation scheme based on fully harmonic signal was develeped, which yields linear output within wide dynamic range. This type of modulation requires high level of synchronization achieved by using a field-programmable gate array module. The gyroscope utilizes powerful broadband fiber source, polarizer and Lyot depolarizer which ensure good reciprocity of whole architecture. The parameters of the sensor, obtained by measurement, are even comparable to some sensors using PM fiber, which is much more expensive.
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Dutta, Indranil. "Stability improvement of a sagnac cold atom interferometer : towards continuous operation." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066572/document.

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Cette thèse a pour objet de repousser les performances d'un interféromètre à atomes froids principalement sensible aux rotations selon un axe particulier. Des atomes de Cesium sont refroidis par laser, piégés, et lancés verticalement selon une configuration en fontaine. La sensibilité du gyromètre repose sur l'effet Sagnac et est proportionnelle à l'aire physique qu'entourent les deux bras de l'interféromètre. Nous utilisons des transitions Raman stimulées pour séparer les ondes atomiques et former une géométrie d'interféromètre de type Mach-Zehnder replié. Avec un temps d'interrogation de 800 ms, nous parvenons à une aire physique de 11 cm^2. Le manuscrit décrit les améliorations apportées au dispositif expérimental pour faire fonctionner le gyromètre avec une telle aire Sagnac. Une procédure d'alignement relatif des faisceaux Raman au niveau du microrad est présentée et est particulièrement importante pour permettre aux ondes de matière d'interférer. La caractérisation des bruits de vibration impactant la sensibilité du gyromètre, ainsi que sa réjection sont également décrites. Nous démontrons une sensibilité de 160 nrad/s à 1 s, et une stabilité long terme de 1.8 nrad/s après 10 000 s d'intégration. Ce niveau de stabilité représente une amélioration d'un facteur 5 par rapport à la précédente expérience de gyromètre du SYRTE de 2009, et d'un facteur 15 par rapport aux autres résultats publiés. Cette thèse présente également une nouvelle méthode d'interrogation des atomes pour opérer le gyromètre sans temps morts, un aspect important pour diverses applications des capteurs à atomes froids en navigation inertielle, en géophysique et en physique fondamentale
This thesis aims at pushing the performances of a cold atom interferometer principally sensitive to rates of rotation in a particular axis. In our experiment, Cesium atoms are laser cooled, trapped and launched in a fountain configuration. According to the Sagnac effect, the sensitivity of the interferometer to rotation is proportional to the area enclosed by the interferometer arms. We use stimulated Raman transitions to split the atoms in two paths and to form a folded Mach-Zehnder-like interferometer architecture using four Raman pulses. With an interrogation time of the atoms of 800 ms, we achieve a Sagnac area as high as 11 cm^2. The thesis describes the improvements to the experimental setup to operate the gyroscope with such a high Sagnac area. A procedure for the relative alignment of the Raman beams at the microrad level is presented, which is critical to meet the interference condition of the cold atoms at the interferometer output. The characterization and mitigation of the vibration noise, affecting the gyroscope, is also demonstrated. We finally demonstrate a short term rotation stability of 160 nrad/s at 1 s and a long term stability of 1.8 nrad/s after 10 000 s of integration time. This stability level represents a factor 5 improvement compared to the previous SYRTE gyroscope experiment of 2009 and a factor 15 compared to other published results. The thesis work also presents a new method of interrogation to operate the gyroscope without dead times, which is important for various applications of cold atom sensors in inertial navigation, geophysics and in fundamental physics
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Canuel, Benjamin. "Etude d'un gyromètre à atomes froids." Paris 11, 2007. http://www.theses.fr/2007PA112049.

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Nous présentons l’étude d’un capteur inertiel basé sur l’interférence d’ondes atomiques permettant d’effectuer des mesures simultanées de rotations et d’accélérations. Contrairement aux appareils précédents, l’utilisation d’atomes refroidis par laser permet d’obtenir un dispositif compact et stable sur le long terme. Cet appareil utilise deux sources d’atomes de Césium froids lancées dans des directions opposées sur des trajectoires paraboliques. Au sommet de cette trajectoire, les atomes interagissent avec des impulsions lasers induisant des transitions Raman stimulées (séquence d’impulsions p/2–p–p/2), afin de réaliser la séparation, la déflection et la recombinaison des paquets d’ondes atomiques. A la sortie de l’interféromètre, le déphasage mesuré est proportionnel à l’accélération et à la vitesse de rotation de l’appareil. Ce signal de déphasage est également sensible à certaines imperfections expérimentales qui peuvent dégrader la stabilité (bruit de phase des lasers, fluctuation du champ magnétique, bruit de vibration) ou l’exactitude de l’appareil (gradient de champ magnétique, défauts de trajectoires, déplacement lumineux) dont nous déterminons l’influence. Nous étudions les améliorations apportées aux sources atomiques concernant notamment le contrôle des trajectoires et la stabilité des mesures de déphasage obtenue dans des configurations utilisant des faisceaux Raman verticaux et horizontaux. Dans ce dernier cas les sensibilités atteintes sont respectivement de 3,5 10-7 rad. S-1 et 8 10-7 m. S-2 sur 1 s pour des mesures de rotation et d’accélération. Une première étude de l’exactitude des mesures est également présentée en utilisant la rotation de la Terre
We present the study of an inertial sensor based on matter-wave interferences. This device gives high precision measurement for both rotation rate and acceleration. In contrast with previous analog setups we emphasize on the long term stability and the compactness of the device by the use of laser cooled atoms. Two cold atomic sources of Cesium are launched on counter-propagating parabolic trajectories. At the top of the trajectory, the atoms interact with light pulses inducing stimulated Raman transitions (p/2–p–p/2 pulse sequence). These pulses split, deflect and recombine the wave-packets to realise the interferometer. The phase difference measured at the output of the interferometer is linked to the acceleration and the rotation rate of the device. This signal is also sensitive to some imperfections of the experimental setup which can impact the stability (laser phase noise, magnetic field fluctuation, vibration noise) or the accuracy (magnetic field gradients, trajectories imperfections, light shifts) of the measurement. The influence of these effects is analysed. We also study the improvements of the setup (mainly concerning the atomic trajectories) and the stability obtained in configurations using horizontal and vertical Raman lasers. In this case, the sensitivity reached is respectively 3,5 10-7 rad. S-1 and 8 10-7 m. S-2 in 1 s for rotation and acceleration measurement. We present a first study of the accuracy of the measurement by using the Earth rotation
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Gauguet, Alexandre. "Gyromètre à atomes froids : étude de la stabilité limite et des effets systématiques liés aux séparatrices lasers." Paris 6, 2008. https://tel.archives-ouvertes.fr/tel-00322150.

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Cette thèse présente l’étude d’un gyromètre à atomes froids fondé sur l’interférence de paquets d’onde atomiques. Les paquets d’onde sont manipulés à l’aide d’impulsions lasers induisant des transitions Raman stimulées. Ces transitions sont utilisées pour réaliser un interféromètre atomique d’aire non nulle, dont le déphasage en sortie, est proportionnel à la vitesse de rotation et à l’accélération de l’instrument. La particularité de notre gyromètre à atomes, par rapport aux dispositifs précédents, réside dans l’utilisation d’atomes refroidis par laser, ce qui permet la réalisation d’un instrument compact et stable sur le long terme. L’amélioration du dispositif expérimental a permis d’atteindre des sensibilités sur 1 seconde de 2,4 10-7 rad. S-1 et de 6 10-7 m. S-2 pour des mesures de rotation et d’accélération. Ce travail montre que pour les mesures de rotation la résolution est limitée par le bruit de projection quantique et pour les mesures d’accélération par les vibrations parasites. Au cours de cette thèse, j'ai également étudié en détail l'influence des déphasages induits lors des interactions Raman (déplacement lumineux, défauts de front d’onde des lasers). En particulier, nous avons montré que ces effets limitent la stabilité long terme des mesures. Une étude de l’exactitude des mesures sera également présentée, en utilisant la rotation de la Terre.
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Holleville, David. "conception et réalisation d'un gyromètre à atomes froids fondé sur l'effet Sagnac pour les ondes de matière." Phd thesis, Université Paris Sud - Paris XI, 2001. http://tel.archives-ouvertes.fr/tel-00001098.

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L'objectif de la thèse était d'utiliser les développements de la manipulation d'atomes par lasers pour réaliser un appareil capable de mesurer les vitesses de rotation avec une sensibilité équivalente à celle des meilleurs gyromètres optiques. Les gyromètres atomiques, comme les gyromètres optiques sont fondés sur l'effet Sagnac. Cet effet est l'apparition d'un déphasage à la sortie d'un interféromètre d'aire non nulle, lorsque le dispositif est en rotation. On montre que l'effet Sagnac appliqué aux ondes de matière associées à des atomes de césium par exemple, est 1011 fois plus sensible que lorsqu'il est appliqué aux ondes lumineuses. La principale difficulté du dispositif est de séparer et de recombiner de façon cohérente les ondes atomiques. Dans notre dispositif, ceci est réalisé dans la zone d'interaction, grâce à des transitions à deux photons appelées transitions Raman stimulées. C'est l'impulsion des deux photons qui, une fois transférée à l'atome au cours de la transition, va provoquer la séparation angulaire des deux paquets d'ondes atomiques. La réalisation du dispositif s'appuie sur un grand nombre de nouvelles solutions techniques qui ont été validées au cours de la thèse. L'un des soucis principal a été de réaliser un appareil compact et suffisamment insensible aux paramètres extérieurs (champ magnétique, température, ?) pour qu'il puisse être transportable. Notre source atomique est une source à atomes refroidis par lasers, permettant ainsi d'avoir une zone d'interaction réduite tout en conservant un très bon niveau de performance. L'appareil est également sensible aux accélérations ; une technique de double jets atomiques contra-propageant a donc été mise en ?uvre pour discriminer les déphasages liés à la rotation et à l'accélération.
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Books on the topic "Sagnac effect"

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Maltby, Richard A. The dioxin story: A community commentary on the health and safety effects of dioxin contamination and other toxic chemical wastes in the Saginaw Valley. Midland, Mich: Richard A. Maltby, 2004.

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Maltby, Richard A. The dioxin story, episode II: Continuation of a community commentary on the health and safety effects of dioxin contamination and other hazardous wastes and environmental concerns in the Saginaw Valley. Midland, Mich: Richard A. Maltby, 2005.

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Bezos, MacKenzie. The Testing of Luther Albright. New York: HarperCollins, 2006.

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The testing of Luther Albright: A novel. New York: Fourth Estate, 2005.

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Bezos, MacKenzie. The testing of Luther Albright: A novel. New York, NY: Fourth Estate, 2004.

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Deruelle, Nathalie, and Jean-Philippe Uzan. The kinematics of light. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198786399.003.0021.

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This chapter embarks on the study of light in the vacuum in special relativity. Here, the chapter represents light by world lines of zero length, that is, by particles that propagate at speed c. Such a description does not include the electromagnetic or quantum wave nature of light, but it does allow the interpretation of experiments which measure light travel times (such as the Sagnac experiment) or aberration effects due to motion of the receiver. The chapter first defines the light lines, or the light-like lines, which are lines of zero length, and one of these lines can represent the world line of a signal or photon. It then turns to a discussion of the Sagnac effect, before finally considering the aberration formulas.
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Hawes, Clement. Gulliver Effects. Edited by Alan Downie. Oxford University Press, 2014. http://dx.doi.org/10.1093/oxfordhb/9780199566747.013.031.

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It has been difficult to place Gulliver’s Travels within a post-Wattsian account of the novel’s emergence and consolidation. Nevertheless, Swift’s text had important effects on the genre he so tellingly satirized. There is, for instance, a Gulliverian source for Fielding’s later assaults both on ‘realism’ and on ontological individualism. The brilliant denunciation of war near the end of Gulliver is likewise extended and novelistically developed in Tristram Shandy. Smollett’s curmudgeonly narrator in Humphry Clinker can be usefully understood as his contribution to Swift’s ‘satirist-satirized’ topos. Frances Burney’s Evelina appropriates Swift’s simian ‘Yahoo’ theme by way of mocking the English upper class. Finally, Swift’s ‘degeneration’ topos is played out as an Irish family saga in Maria Edgeworth’s Castle Rackrent. Though not a novel as such, Gulliver’s Travels is necessary to understand the novel’s history.
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Garland, David Ernest. Effect of ageing errors on estimates of growth, mortality and yield-per-recruit for the Chilean sardine (Sardinops sagax). 1993.

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Ferrari, Matteo. A Comparative Study of Communication About Food Safety Before, During, and After the “Mad Cow” Crisis. Edited by Kathleen Hall Jamieson, Dan M. Kahan, and Dietram A. Scheufele. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780190497620.013.15.

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The “mad cow” saga provides useful insights into the complexities that surround public communication on food safety issues. The first part of the chapter describes the most important scientific characteristics of bovine spongiform encephalopathy (BSE) and its human counterpart, variant Creutzfeldt-Jakob disease. The second section offers an account of the unfolding of public communication before, during, and after the BSE crisis, including the diverse positions adopted by different countries and the legal reforms enacted to improve risk communication. The final part provides an analysis of the key features of the mad cow crisis: the importance of trust and transparency, the uncertainties that can characterize scientific information, the effects of cognitive bias, and the role of cultural context. All these factors contributed to both the amplifying and downplaying—depending on place and time—of the BSE risk in the public mind.
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Mack, Adam. To Quiet the Roar of the Mob. University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252039188.003.0004.

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This chapter examines the saga of George M. Pullman's “model town,” which he originally envisioned as a way to reform the senses of the working classes and achieve a peaceful and sustainable solution to the labor problem. With his construction of a model town, Pullman believed he could tame the sensory values of his workers by promoting “self-restraint” and the refinement of “coarse tastes.” In the end, however, Pullman's effort to regulate workers' sensory lives yielded resentment that culminated in a railroad strike in 1894. This chapter first discusses the Great Railroad Strike of 1877 and how it raised concerns about a radical mob bent on stifling—even reversing—Chicago's economic modernization. It then considers Pullman's ambitious plan to build a corporate town south of the city that would retrain workers' senses to ease the conflict between labor and capital without sacrificing the bottomline of his Palace Car Company. The chapter concludes with an analysis of the Pullman Strike of 1894 sparked by suffering and discontent in the model town.
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Book chapters on the topic "Sagnac effect"

1

Ricci, Fulvio, and Massimo Bassan. "The Sagnac Effect." In Experimental Gravitation, 349–58. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-95596-0_13.

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Tartaglia, A. "Sagnac, Gclock Effect and Gravitomagnetism." In Recent Developments in General Relativity, Genoa 2000, 353–60. Milano: Springer Milan, 2002. http://dx.doi.org/10.1007/978-88-470-2101-3_26.

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Rizzi, Guido, and Matteo Luca Ruggiero. "The Relativistic Sagnac Effect: Two Derivations." In Relativity in Rotating Frames, 179–220. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-94-017-0528-8_12.

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Selleri, Franco. "Sagnac Effect: End of the Mystery." In Relativity in Rotating Frames, 57–77. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-94-017-0528-8_6.

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Ashby, Neil. "The Sagnac Effect in the Global Positioning System." In Relativity in Rotating Frames, 11–28. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-94-017-0528-8_3.

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Pascual-Sánchez, José-Fernando, Angel San Miguel, and Francisco Vicente. "Isotropy of the Velocity of Light and the Sagnac Effect." In Relativity in Rotating Frames, 167–78. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-94-017-0528-8_11.

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Mule, Somesh, Arpit Rawankar, Bharati Singh, and Mohit Gujar. "Measurement of Angular Velocity and Tilt Angle of Two-Dimensional Fiber-Optic Gyroscope with Sagnac Effect." In Lecture Notes in Electrical Engineering, 119–25. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2926-9_14.

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Rajasekar, S., and R. Velusamy. "Berry's Phase, Aharonov–Bohm and Sagnac Effects." In Quantum Mechanics II, 105–30. 2nd ed. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003172192-5.

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Friedman, Lionel. "The Hall Effect Saga." In Condensed Matter Physics, 180–83. New York, NY: Springer New York, 1987. http://dx.doi.org/10.1007/978-1-4612-4772-2_19.

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Sims, David. "Merging the Myths: A Study of the Effect of Organizational Mythmaking in an Organizational Merger." In Organizational Epics and Sagas, 118–30. London: Palgrave Macmillan UK, 2008. http://dx.doi.org/10.1057/9780230583603_11.

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Conference papers on the topic "Sagnac effect"

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Sunada, Satoshi, and Takahisa Harayama. "Sagnac effect in Resonant Microcavities." In Optical Fiber Sensors. Washington, D.C.: OSA, 2006. http://dx.doi.org/10.1364/ofs.2006.tue62.

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Sunada, S., and T. Harayama. "Sagnac Effect in Resonant Microcavities." In Proceedings of 2006 8th International Conference on Transparent Optical Networks. IEEE, 2006. http://dx.doi.org/10.1109/icton.2006.248248.

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Kajari, Endre, Reinhold Walser, Wolfgang P. Schleich, and Aldo Delgado. "Sagnac Effect in Gödel’s Universe." In Frontiers in Optics. Washington, D.C.: OSA, 2006. http://dx.doi.org/10.1364/fio.2006.jwd48.

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Tian, Xiaohua, and Kun Chen. "The Theoretical Limit of Sagnac Effect." In 2018 Joint International Advanced Engineering and Technology Research Conference (JIAET 2018). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/jiaet-18.2018.77.

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Kodz, Jaroslav, Kestutis Regelskis, Julijanas Zeludevicius, and Nikolajus Gavrilinas. "Optical isolator based on Sagnac effect." In Fiber Lasers and Glass Photonics: Materials through Applications III, edited by Stefano Taccheo, Maurizio Ferrari, and Angela B. Seddon. SPIE, 2022. http://dx.doi.org/10.1117/12.2621054.

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Harayama, Takahisa, Satoshi Sunada, Shuichi Tamura, Keizo Inagaki, and Hiroyuki Noto. "Nonlinear Sagnac effect for ring laser gyroscopes." In Optical Fiber Sensors. Washington, D.C.: OSA, 2006. http://dx.doi.org/10.1364/ofs.2006.tue63.

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Sunada, Satoshi, Takahisa Harayama, and Tomohiro Miyasaka. "Generalized Sagnac Effect in Rotating Optical Cavities." In 2007 9th International Conference on Transparent Optical Networks. IEEE, 2007. http://dx.doi.org/10.1109/icton.2007.4296366.

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TARTAGLIA, A. "SAGNAC AND THE G-CLOCK EFFECT REVISITED." In Proceedings of the XXIII Spanish Relativity Meeting. WORLD SCIENTIFIC, 2001. http://dx.doi.org/10.1142/9789812810021_0016.

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Silvestri, Raffaele, Haocun Yu, Robert W. Peterson, Christopher Hilweg, and Philip Walther. "Probing Earth’s rotation effect on two-photon entanglement." In Quantum 2.0. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/quantum.2023.qm2b.1.

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We present the first experimental measurement of the Earth’s rotation induced phase shift on a two-photon maximally entangled state by means of a large-scale fiber Sagnac interferometer of milliradian phase resolution.
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Kiehn, R. M. "The Sagnac effect and the chirality of space time." In Optical Engineering + Applications, edited by Chandrasekhar Roychoudhuri, Al F. Kracklauer, and Katherine Creath. SPIE, 2007. http://dx.doi.org/10.1117/12.738322.

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Reports on the topic "Sagnac effect"

1

Maydykovskiy, Igor, and Petras Užpelkis. Sagnac effect - experimental confirmation of the Theory of Phase Medium. Intellectual Archive, November 2019. http://dx.doi.org/10.32370/iaj.2204.

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Kaplan, A. E. Nonlinear Nonreciprocity. Theory and Applications to the Enhancement of the Sagnac Effect, Optical Bistability. Fort Belvoir, VA: Defense Technical Information Center, November 1985. http://dx.doi.org/10.21236/ada164374.

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Kyle, Charles M. RMA to ONA: The Saga of an Effects-Based Operation. Fort Belvoir, VA: Defense Technical Information Center, November 2008. http://dx.doi.org/10.21236/ada499725.

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Simulated effects of pumping irrigation wells on ground-water levels in western Saginaw County, Michigan. US Geological Survey, 2001. http://dx.doi.org/10.3133/wri014227.

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