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Academic literature on the topic 'Sagnac interferometer'

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Published: 4 June 2021
Last updated: 26 January 2023

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Journal articles on the topic "Sagnac interferometer"

1

Srinivasan, Hemanth, and Nirmal K. Viswanathan. "Berry phase with tunable topological charge in Sagnac interferometer." Journal of Optics 24, no. 4 (February 25, 2022): 044006. http://dx.doi.org/10.1088/2040-8986/ac5475.

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Abstract A Sagnac interferometer’s ring structure causes electromagnetic waves traversing it to periodically encounter the same optical elements. Due to this discrete translational symmetry, the frequency spectrum of the clockwise and counter-clockwise modes acquire a band structure with a characteristic band gap. When the interferometer is rotated, an additional non-reciprocal phase shift between the counter propagating modes arises and it results in the loss of time reversal symmetry. While prior understanding of the impact of Sagnac rotation on the band structure exists, the prevalence of topological geometric phase in Sagnac interferometer under rotation has not been prominently discussed. We propose a coupled mode theory with the required time reversal symmetry properties which influences the Berry curvature and we show that it leads to the accumulation of Berry phase with tunable topological charge.
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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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Yu, Hoon, Seung Jin Kim, and Jung Bog Kim. "Optimal control for generating excited state expansion in ring potential." Open Physics 18, no. 1 (July 28, 2020): 374–79. http://dx.doi.org/10.1515/phys-2020-0171.

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AbstractWe applied an optimal control algorithm to an ultra-cold atomic system for constructing an atomic Sagnac interferometer in a ring trap. We constructed a ring potential on an atom chip by using an RF-dressed potential. A field gradient along the radial direction in a ring trap known as the dimple-ring trap is generated by using an additional RF field. The position of the dimple is moved by changing the phase of the RF field [1]. For Sagnac interferometers, we suggest transferring Bose–Einstein condensates to a dimple-ring trap and shaking the dimple potential to excite atoms to the vibrational-excited state of the dimple-ring potential. The optimal control theory is used to find a way to shake the dimple-ring trap for an excitation. After excitation, atoms are released from the dimple-ring trap to a ring trap by adiabatically turning off the additional RF field, and this constructs a Sagnac interferometer when opposite momentum components are overlapped. We also describe the simulation to construct the interferometer.
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Ham, Byoung S. "A Nonclassical Sagnac Interferometer Using Coherence de Broglie Waves." Advanced Devices & Instrumentation 2021 (November 3, 2021): 1–7. http://dx.doi.org/10.34133/2021/9862831.

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A Sagnac interferometer has been a powerful tool for gyroscope, spectroscopy, and navigation based on the Sagnac effects between counterpropagating twin fields in a closed loop, whose difference phase is caused by Einstein’s special relativity. Here, a nonclassical version of a Sagnac interferometer is presented using completely different physics of coherence de Broglie waves (CBW) in a cavity, where CBW is a nonclassical feature overcoming the standard quantum limit governed by classical physics.
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Capmany, José, Pascual Muñoz, Salvador Sales, Daniel Pastor, Beatriz Ortega, and Alfonso Martinez. "Arrayed waveguide Sagnac interferometer." Optics Letters 28, no. 3 (February 1, 2003): 197. http://dx.doi.org/10.1364/ol.28.000197.

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Bertocchi, G., O. Alibart, D. B. Ostrowsky, S. Tanzilli, and P. Baldi. "Single-photon Sagnac interferometer." Journal of Physics B: Atomic, Molecular and Optical Physics 39, no. 5 (February 6, 2006): 1011–16. http://dx.doi.org/10.1088/0953-4075/39/5/001.

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Wang, Xue-Zhou, and Qi Wang. "A High-Birefringence Microfiber Sagnac-Interferometer Biosensor Based on the Vernier Effect." Sensors 18, no. 12 (November 23, 2018): 4114. http://dx.doi.org/10.3390/s18124114.

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We propose a high-sensitive Sagnac-interferometer biosensor based on theVernier effect (VE) with a high-birefringence microfiber. The sensitivity enhancement is achieved by utilizing two cascaded Sagnac interferometers. One of the two interference loops consists of a panda polarization-maintaining fiber as a filter, whilst the other is comprised of high-birefringent microfiber coated Graphene oxide (GO) as a sensing channel. We theoretically analyzed the sensitivity of the sensor and verified it with experiments. The results of the simulation show that the refractive index sensitivity is more than five times that of the fiber sensor based on a single Sagnac loop. The sensitivity of the refractive index in the experiments can reach 2429 nm/refractive index unit (RIU), which is basically in accordance with the simulation. We also use electrostatic adsorption to coat GO on the surface of the sensing channel. GO is employed to adsorb bovine serum albumin (BSA) molecules to achieve the desired detection results, which has good biocompatibility and large specific surface area. The sensitivity to detect BSA can reach 9.097 nm/(mg×mL−1).
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Omar, Mohd Azwadi, Noran Azizan Cholan, Aminuddin Mohd, Mirsa Nurfarhan Mohd Azhan, Rahmat Talib, and Nor Hafizah Ngajikin. "Optical Temperature Sensor based on Sagnac Interferometer." International Journal of Engineering & Technology 7, no. 4.30 (November 30, 2018): 126. http://dx.doi.org/10.14419/ijet.v7i4.30.22073.

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Optical temperature sensors gain interest from the community recently due to their immunity to electromagnetic interference and ruggedness against chemical and mechanical disturbances as opposed to the conventional temperature sensors such as thermocouples and resistance temperature detectors. Optical temperature sensors come with many varieties and Sagnac interferometer is one of them. In this work, an all-fiber temperature sensor is proposed and experimentally demonstrated. The proposed optical temperature utilizes Sagnac interferometer as the temperature head. The underlying mechanism for this sensor is based on the temperature dependence of a polarization maintaining fiber (PMF) in the Sagnac interferometer. The PMF birefringence which is influenced by temperature affects the phase difference of two incoming lights that enter the Sagnac interferometer and this contributes to the shifting of the transmission spectrum. The input light for the sensor characterization is provided by a custom-made amplified spontaneous emission source which comprises of a tunable laser source, a 980 nm laser diode pump, a wavelength division multiplexing coupler and a 10 m long erbium-doped fiber. Experimental results indicate that the temperature does affect the PMF characteristic. As the temperature increases from 30°C to 45°C, the wavelength dip reduced from 1553.8 nm to 1536.78nm. This proposed optical temperature sensor has a sensitivity of-1.0345 nm/°C. The development of this optical temperature sensor is promising especially for the measurement in the harsh environment.
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Thomas, Stephen, Colson Sapp, Charles Henry, Andrew Smith, Charles A. Sackett, Charles W. Clark, and Mark Edwards. "Modeling Atom Interferometry Experiments with Bose–Einstein Condensates in Power-Law Potentials." Atoms 10, no. 1 (March 21, 2022): 34. http://dx.doi.org/10.3390/atoms10010034.

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Recent atom interferometry (AI) experiments involving Bose–Einstein condensates (BECs) have been conducted under extreme conditions of volume and interrogation time. Numerical solution of the rotating-frame Gross–Pitaevskii equation (RFGPE), which is the standard mean-field theory applied to these experiments, is impractical due to the excessive computation time and memory required. We present a variational model that provides approximate solutions of the RFGPE for a power-law potential on a practical time scale. This model is well-suited to the design and analysis of AI experiments involving BECs that are split and later recombined to form an interference pattern. We derive the equations of motion of the variational parameters for this model and illustrate how the model can be applied to the sequence of steps in a recent AI experiment where BECs were used to implement a dual-Sagnac atom interferometer rotation sensor. We use this model to investigate the impact of finite-size and interaction effects on the single-Sagnac-interferometer phase shift.
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MOROZOVA, V. S., and B. J. AHMEDOV. "QUANTUM INTERFERENCE EFFECTS IN SLOWLY ROTATING NUT SPACE–TIME." International Journal of Modern Physics D 18, no. 01 (January 2009): 107–18. http://dx.doi.org/10.1142/s0218271809014352.

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General relativistic quantum interference effects in a slowly rotating NUT space–time, such as the Sagnac effect and the phase shift effect of interfering particles in a neutron interferometer, are considered. It was found that in the case of the Sagnac effect, the influence of the NUT parameter is becoming important due to the fact that the angular velocity of the locally nonrotating observer must be larger than the one in the Kerr space–time. In the case of neutron interferometry, it is found that due to the presence of the NUT parameter, an additional term in the phase shift of interfering particles emerges. This term can be, in principle, detected by a sensitive interferometer and the derived results could be further used in experiments to detect the gravitomagnetic charge. Finally, as an example, we apply the obtained results to the calculation of the UCN (ultra-cold neutrons) energy level modification in a slowly rotating NUT space–time.
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Dissertations / Theses on the topic "Sagnac interferometer"

1

McConnell, Sean R. "Gas detection by use of Sagnac interferometer." Thesis, Queensland University of Technology, 2008. https://eprints.qut.edu.au/16701/1/Sean_McConnell_Thesis.pdf.

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Gas composition and analysis forms a large field of research whose requirements demand that measurement equipment be as affordable, uncomplicated and convenient as possible. The precise quantitative composition of an atmospheric, industrial or chemically synthesised sample of gas is of utmost importance when inferring the properties and nature of the environment from which the sample was taken, or for inferring how a prepared sample will react in its application. The most popular and widely used technique to achieve this is Gas Chromatography-Mass Spectrometry (GCMS) and, without a doubt, this technique has set the standard for gas analysis. Despite the accuracy of the GCMS technique, the equipment itself is bulky, expensive and cannot be applied readily to field work. Instead, most field work is conducted using a single gas detector, capable only of detecting one particular molecule or element at a time. Presented here is an interferometric technique that theoretically, has the ability to address all three issues of bulkiness, affordability and convenience, whilst not being limited to one particular element or molecule in its analysis. Identifying the unknown constituents of a gaseous mixture using the proposed method, employs the optical refractive properties of the mixture to determine its composition. A key aspect of this technique is that the refractive index of an arbitrary mixture of gases will vary depending on pressure and wavelength1. The Lorentz-Lorenz formula and the Sellmeier equations form the foundation of the theoretical background. The optical refractive properties of air and other atmospheric gases have been well established in the literature. The experimental investigations described here have been conducted based on this, insofar as no analysis has been conducted on gases that do not naturally occur in reasonable abundance in the atmosphere. However this does not in any way preclude the results and procedure developed from applying to a synthesised gas mixture. As mentioned, the platform of this technique relies on the pressure and wavelength dependence of the refractivity of the gas. The pressure dependence of the system is easily accounted for, in making this claim however it is still imperative the mixture be impervious to contamination from the wider atmosphere. Wavelength dependence however is perhaps slightly more difficult to accommodate. Multiple lasers, of differing wavelength form the radiative sources which underpin the method developed. Laser sources were chosen because of their coherence, making it easy to produce interference, when combined with the inherent stability of the Sagnac interferometer, provides for a very user friendly system that is able to quickly take results. The other key part of the experimental apparatus is the gas handling system, the gas(es) of interest need to be contained within an optical medium in the path of one of the beams of the interferometer. Precise manipulation of the pressure of the gas is critical in determining concentration, this has been achieved through the use of a gas syringe whose plunger is moved on a finely threaded screw, and measured on a digital manometer. The optical setup has also been explored, specifically in ruling out the use of such radiative sources as passing an incandescent source through a monochromator or the use of LED's to produce interference before settling on lasers to produce the required interference. Finally, a comprehensive theoretical background has been presented using classical electromagnetic theory as well as confirmation from a quantum perspective. The theoretical background for this study relies upon the Lorentz-Lorenz formula. It is commonly presented either from a classical or quantum perspective, in this work both classical and quantum mechanical treatments are given whilst also showing how each confirms the other. Furthermore, a thorough investigation into the dispersion functions of each of the major components of the atmosphere has been compiled from the study of refractivity on individual gases from other authors, in some cases, where no work has been done previously, this has been derived. The technique developed could be considered an ample addition to gas analysis techniques in certain circumstances in terms of expense, convenience and accuracy. The system can predict relative quantities of constituents of the atmosphere to at least 3%. The method described here would allow researchers more time to concentrate on actual results and more resources to allocate to broadening intellectual horizons. This would certainly justify further development.
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McConnell, Sean R. "Gas detection by use of Sagnac interferometer." Queensland University of Technology, 2008. http://eprints.qut.edu.au/16701/.

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Gas composition and analysis forms a large field of research whose requirements demand that measurement equipment be as affordable, uncomplicated and convenient as possible. The precise quantitative composition of an atmospheric, industrial or chemically synthesised sample of gas is of utmost importance when inferring the properties and nature of the environment from which the sample was taken, or for inferring how a prepared sample will react in its application. The most popular and widely used technique to achieve this is Gas Chromatography-Mass Spectrometry (GCMS) and, without a doubt, this technique has set the standard for gas analysis. Despite the accuracy of the GCMS technique, the equipment itself is bulky, expensive and cannot be applied readily to field work. Instead, most field work is conducted using a single gas detector, capable only of detecting one particular molecule or element at a time. Presented here is an interferometric technique that theoretically, has the ability to address all three issues of bulkiness, affordability and convenience, whilst not being limited to one particular element or molecule in its analysis. Identifying the unknown constituents of a gaseous mixture using the proposed method, employs the optical refractive properties of the mixture to determine its composition. A key aspect of this technique is that the refractive index of an arbitrary mixture of gases will vary depending on pressure and wavelength1. The Lorentz-Lorenz formula and the Sellmeier equations form the foundation of the theoretical background. The optical refractive properties of air and other atmospheric gases have been well established in the literature. The experimental investigations described here have been conducted based on this, insofar as no analysis has been conducted on gases that do not naturally occur in reasonable abundance in the atmosphere. However this does not in any way preclude the results and procedure developed from applying to a synthesised gas mixture. As mentioned, the platform of this technique relies on the pressure and wavelength dependence of the refractivity of the gas. The pressure dependence of the system is easily accounted for, in making this claim however it is still imperative the mixture be impervious to contamination from the wider atmosphere. Wavelength dependence however is perhaps slightly more difficult to accommodate. Multiple lasers, of differing wavelength form the radiative sources which underpin the method developed. Laser sources were chosen because of their coherence, making it easy to produce interference, when combined with the inherent stability of the Sagnac interferometer, provides for a very user friendly system that is able to quickly take results. The other key part of the experimental apparatus is the gas handling system, the gas(es) of interest need to be contained within an optical medium in the path of one of the beams of the interferometer. Precise manipulation of the pressure of the gas is critical in determining concentration, this has been achieved through the use of a gas syringe whose plunger is moved on a finely threaded screw, and measured on a digital manometer. The optical setup has also been explored, specifically in ruling out the use of such radiative sources as passing an incandescent source through a monochromator or the use of LED's to produce interference before settling on lasers to produce the required interference. Finally, a comprehensive theoretical background has been presented using classical electromagnetic theory as well as confirmation from a quantum perspective. The theoretical background for this study relies upon the Lorentz-Lorenz formula. It is commonly presented either from a classical or quantum perspective, in this work both classical and quantum mechanical treatments are given whilst also showing how each confirms the other. Furthermore, a thorough investigation into the dispersion functions of each of the major components of the atmosphere has been compiled from the study of refractivity on individual gases from other authors, in some cases, where no work has been done previously, this has been derived. The technique developed could be considered an ample addition to gas analysis techniques in certain circumstances in terms of expense, convenience and accuracy. The system can predict relative quantities of constituents of the atmosphere to at least 3%. The method described here would allow researchers more time to concentrate on actual results and more resources to allocate to broadening intellectual horizons. This would certainly justify further development.
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3

Schubert, Christian [Verfasser]. "Grossflächiges Sagnac Interferometer mit kalten Atomen / Christian Schubert." Hannover : Technische Informationsbibliothek und Universitätsbibliothek Hannover (TIB), 2012. http://d-nb.info/1024389138/34.

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4

Kaufer, Henning [Verfasser]. "Opto-mechanics in a Michelson-Sagnac interferometer / Henning Kaufer." Hannover : Technische Informationsbibliothek und Universitätsbibliothek Hannover (TIB), 2014. http://d-nb.info/1051038162/34.

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5

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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Schreiber, Michael Stuart. "ADVANCES IN THE OPTO-MECHANICAL DESIGN AND ALIGNMENT OF THE HEHSI IMAGING SPECTROMETER BASED ON A SAGNAC INTERFEROMETER." Master's thesis, University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2463.

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The High Efficiency HyperSpectral Imager (HEHSI) is a Fourier Transform hyperspectral imager based on a Sagnac interferometer. This thesis research concentrates on the design upgrade and calibration of HEHSI from a proof of concept instrument to a prototype field instrument. Stability is enhanced by removing degrees of freedom and alignment is enhanced by providing for in-situ adjustments. The use of off the shelf components allows for reduced development time and cost constraints. HEHSI is capable of multiple configurations to accommodate sensors and optics with specialized capabilities for multiple wavelength ranges and viewing conditions. With a spectral response of 400 to 1000 nanometers in the visible and very near IR as well as 900 to 1700nm in the Near IR. Creation and use of a real time feedback alignment utility allow quantifiable signal comparison and image alignment. Advances allow for HEHSI to remain aligned during data collection sessions and confirmation of alignment through quantitative measures.
M.S.M.E.
Department of Mechanical, Materials and Aerospace Engineering;
Engineering and Computer Science
Mechanical Engineering
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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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Secmen, Basak. "Simulation On Interferometric Fiber Optic Gyroscope With Amplified Optical Feedback." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1253657/index.pdf.

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Position and navigation of vehicle in two and three dimensions have been important as being advanced technology. Therefore, some system has been evaluated to get information of vehicle&rsquo
s position. Main problem in navigation is how to determine position and rotation in three dimensions. If position and rotation is determined, navigation will also be determined with respect to their initial point. There is a technology that vehicle velocity can be discovered, but a technology that rotation can be discovered is needed. Sensor which sense rotation is called gyroscope. If this instrument consists of optical and solid state material, it&rsquo
s defined by Fiber Optic Gyroscope (FOG). There are various studies in order to increase the sensitivity of fiber optic gyroscopes, which is an excellent vehicle for sensing rotation. One of them is interferometric fiber optic gyroscope with amplified optical feedback (FE_FOG). In this system, a feedback loop, which sent the output pulse through the input again, is used. The total output is the summation of each interference and it is in pulse state. The peak position of the output pulse is shifted when rotation occurs. Analyzing this shift, the rotation angle can be determined. In this study, fiber optic gyroscopes, their components and performance characteristics were reviewed. The simulation code was developed by VPIsystems and I used VPItransmissionMakerTM software in this work. The results getting from both rotation and nonrotation cases were analyzed to determine the rotation angle and sensitivity of the gyroscope.
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PLAZAS, ORTEGA Lucero. "Compressão de ruído quântico em um interferômetro Sagnac em fibra com laser pulsado em 1,55 microns." Universidade Federal de Pernambuco, 2015. https://repositorio.ufpe.br/handle/123456789/18323.

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Submitted by Fabio Sobreira Campos da Costa (fabio.sobreira@ufpe.br) on 2017-02-15T13:05:07Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Compressão de Ruído Quantico em um Interferometro Sagnac em Fibra com um Laser Pulsado em 1,55 Microns - Dissertação de Mestrado em Física - Lucero Plazas Ortega.pdf: 7191693 bytes, checksum: 4eba611a9cee045f7f06747bb63a80cb (MD5)
Made available in DSpace on 2017-02-15T13:05:07Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Compressão de Ruído Quantico em um Interferometro Sagnac em Fibra com um Laser Pulsado em 1,55 Microns - Dissertação de Mestrado em Física - Lucero Plazas Ortega.pdf: 7191693 bytes, checksum: 4eba611a9cee045f7f06747bb63a80cb (MD5) Previous issue date: 2015-02-24
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Componentesemquadraturadocampoeletromagn´eticoobedecemaoprincipio de incerteza de Heisenberg. Como resultado a Mecˆanica Quˆantica prevˆe que estas componentes n˜ao podem ser especificadas simultaneamente com precis˜ao ilimitada. Estados de incerteza m´ınima (estados coerentes) permitem atingir o menor produto das incertezas em cada quadratura, ambas de mesma magnitude. Al´em disto ´e poss´ıvel construir estados quˆanticos comprimidos, para os quais uma das suas quadraturas atinge um valor menor para o desvio padr˜ao queaqueledefinidoparaumestadodem´ınimaincerteza,incrementandoconsequentemente a incerteza na outra quadratura. Nesta disserta¸c˜ao fazemos uma revis˜ao destes conceitos e apresentamos um esquema experimental com o qual geramosestadoscomprimidos(squeezedstates)daradia¸c˜ao. Este´ebaseadoem umlaserdefibrapulsado(comprimentodeondaλ = 1.56µm, taxaderepeti¸c˜ao fR = 146MHz, largura de pulso τp = 200fs) associado a um interferˆometro de Sagnac n˜ao linear em fibra. Al´em de uma descri¸c˜ao dos principais componentes ´opticos ser˜ao discutidos os mecanismos de gera¸c˜ao e caracteriza¸c˜ao dos estados comprimidos.
QuadraturecomponentsofthefieldobeyaHeisenberguncertaintyrelation. As a result, quantum mechanics predicts that these components cannot be specified simultaneously with unlimited accuracy. Minimum uncertainty states or coherent states, allow reaching the lowest value of the uncertainty in each quadrature component, both having the same magnitude. It is still possible to construct squeezed quantum states, for which, one of its quadrature components achieves a less value for standard deviation than one that have a state of minimum uncertainty, with the consequence of an increase in the uncertainty of the other quadrature. In this dissertation, these concepts are reviewed and we provide an experimental scheme in order to generate squeezed states of light. This design is based on a pulsed fiber laser (λ = 1.56µm, repetition rate fR = 146MHz, pulse width τp = 200fs) coupled with a nonlinear interferometer, which is composed by a fiber loop in a Sagnac configuration. In order to discuss the experimental results obtained with this scheme, will be carried out adescriptionofthemainopticalcomponents,takingintoaccounttheprincipal mechanisms of generating and measuring of squeezed states.
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Shaddock, Daniel Anthony, and Daniel Shaddock@jpl nasa gov. "Advanced Interferometry for Gravitational Wave Detection." The Australian National University. Faculty of Science, 2001. http://thesis.anu.edu.au./public/adt-ANU20020227.171850.

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In this thesis we investigate advanced techniques for the readout and control of various interferometers. In particular, we present experimental investigations of interferometer configurations and control techniques to be used in second generation interferometric gravitational wave detectors. We also present a new technique, tilt locking, for the readout and control of optical interferometers. ¶ We report the first experimental demonstration of a Sagnac interferometer with resonant sideband extraction (RSE). We measure the frequency response to modulation of the length of the arms and demonstrate an increase in signal bandwidth of by a factor of 6.5 compared to the Sagnac with arm cavities only. We compare Sagnac interferometers based on optical cavities with cavity-based Michelson interferometers and find that the Sagnac configuration has little overall advantage in a cavity-based system. ¶ A system for the control and signal extraction of a power recycled Michelson interferometer with RSE is presented. This control system employs a frontal modulation scheme requiring a phase modulated carrier field and a phase modulated subcarrier field. The system is capable of locking all 5 length degrees of freedom and allows the signal cavity to be detuned over the entire range of possibilities, in principle, whilst maintaining lock. We analytically investigate the modulation/demodulation techniques used to obtain these error signals, presenting an introductory explanation of single sideband modulation/demodulation and double demodulation. ¶ This control system is implemented on a benchtop prototype interferometer. We discuss technical problems associated with production of the input beam modulation components and present several solutions. Operation of the interferometer is demonstrated for a wide range of detunings. The frequency response of the interferometer is measured for various detuned points and we observe good agreement with theoretical predictions. The ability of the control system to maintain lock as the interferometer is detuned is experimentally demonstrated. ¶ Tilt locking, a new technique to obtain an error signal to lock a laser to an optical cavity, is presented. This technique produces an error signal by efficient measurement of the interference between the TEM00 and TEM10 modes. We perform experimental and theoretical comparisons with the widely used Pound-Drever-Hall (PDH) technique. We derive the quantum noise limit to the sensitivity of a measurement of the beam position, and using this result calculate the shot noise limited sensitivity of tilt locking. We show that tilt locking has a quantum efficiency of 80%, compared to 82% for the PDH technique. We present experimental demonstrations of tilt locking in several applications including frequency stabilisation, continuous-wave second harmonic generation, and injection locking of a Nd:YAG slab laser. In each of these cases, we demonstrate that the performance of tilt locking is not the limiting factor of the lock stability, and show that it achieves similar performance to the PDH based system. ¶ Finally, we discuss how tilt locking can be effectively applied to two beam interferometers. We show experimentally how a two beam interferometer typically gives excellent isolation against errors arising from changes in the photodetector position, and experimentally demonstrate the use of tilt locking as a signal readout system for a Sagnac interferometer.
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Books on the topic "Sagnac interferometer"

1

Udd, Eric. Applications of the Sagnac Interferometer and Ring Resonator. John Wiley & Sons Inc, 2008.

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Book chapters on the topic "Sagnac interferometer"

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Bludau, Wolfgang. "Faseroptisches Sagnac-Interferometer als Drehratensensor." In Lichtwellenleiter in Sensorik und optischer Nachrichtentechnik, 283–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-642-72066-6_19.

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Fomitchov, Pavel, Sridhar Krishnaswamy, and Jan D. Achenbach. "Fiberized Sagnac Interferometer for Ultrasound Measurement." In Review of Progress in Quantitative Nondestructive Evaluation, 645–50. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-0383-1_83.

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Fomitchov, Pavel, Sridhar Krishnaswamy, and Jan D. Achenbach. "Sagnac Interferometer for Ultrasound Detection on Rough Surfaces." In Nondestructive Characterization of Materials VIII, 97–103. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-4847-8_16.

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Fomitchov, Pavel A., Alexei Kromine, Sridhar Krishnaswamy, and Jan D. Achenbach. "Characterization of Laser Ultrasonic Sources Using a Sagnac Interferometer." In Review of Progress in Quantitative Nondestructive Evaluation, 675–81. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5339-7_87.

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Kobayashi, T., K. Misawa, H. Kanou, N. Dushkina, and A. Ueki. "Femtosecond Time-Resolved Phase Spectroscopy Using a Novel Sagnac Interferometer." In Springer Series in Chemical Physics, 177–78. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80314-7_76.

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Park, Samuel D., Trevor L. Courtney, Dmitry Baranov, Byungmoon Cho, and David M. Jonas. "Sagnac Interferometer for Two-Dimensional Spectroscopy in the Pump-Probe Geometry." In Springer Proceedings in Physics, 428–31. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13242-6_104.

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Udd, Eric. "Fiber Optic Sensors Based on the Sagnac Interferometer and Passive Ring Resonator." In Fiber Optic Sensors, 199–230. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118014103.ch9.

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Jinno, M., and T. Matsumoto. "Ultrafast, Low Power, and Highly Stable All-Optical Switching in an All Polarization Maintaining Fiber Sagnac Interferometer." In Photonic Switching II, 130–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-76023-5_27.

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Han, Tingting. "Unique Characteristics of Half-Filling Photonic Bandgap Fiber Sagnac Interferometer and Their Applications as Sensor and Switch." In Lecture Notes in Electrical Engineering, 633–41. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-08991-1_65.

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Diels, J. C., P. Dorn, M. Lai, W. Rudolph, and X. M. Zhao. "Femtosecond Sagnac Interferometry." In Ultrafast Phenomena VIII, 120–23. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-84910-7_31.

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Conference papers on the topic "Sagnac interferometer"

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Wendrich, T., M. Gilowski, T. Muller, W. Herr, C. Schubert, E. M. Rasel, and W. Ertmer. "Cold Atom Sagnac Interferometer." In 2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum. IEEE, 2007. http://dx.doi.org/10.1109/freq.2007.4319152.

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Abend, S., P. Berg, M. Gilowski, C. Schubert, G. Tackmann, W. Ertmer, and E. M. Rasel. "Cold atom sagnac interferometer (CASI)." In 12th European Quantum Electronics Conference CLEO EUROPE/EQEC. IEEE, 2011. http://dx.doi.org/10.1109/cleoe.2011.5942975.

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Starodumov, Andrey N., Luis A. Zenteno, D. Monzon, and A. B. Boyain. "Nonlinear spectrally selective Sagnac interferometer." In Second Iberoamerican Meeting on Optics, edited by Daniel Malacara-Hernandez, Sofia E. Acosta-Ortiz, Ramon Rodriguez-Vera, Zacarias Malacara, and Arquimedes A. Morales. SPIE, 1996. http://dx.doi.org/10.1117/12.231130.

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Roither, S., A. Verhoef, O. D. Mucke, G. Reider, A. Pugzlys, and A. Baltuska. "Sagnac-interferometer multipass-loop amplifier." In 2008 Conference on Lasers and Electro-Optics (CLEO). IEEE, 2008. http://dx.doi.org/10.1109/cleo.2008.4551697.

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Jaroszewicz, Leszek, Arkadiusz Ostrzyzek, Mieczyslaw Szustakowski, Leszek Jaroszewicz, Arkadiusz Ostrzyzek, and Mieczyslaw Szustakowski. "Sensitivity And Stability Of Sagnac Fiber Interferometer." In Interferometry '89, edited by Zbigniew Jaroszewicz, Maksymilian Pluta, Zbigniew Jaroszewicz, and Maksymilian Pluta. SPIE, 1990. http://dx.doi.org/10.1117/12.961286.

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Szustakowski, MieczysIaw, Leszek Jaroszewicz, MieczysIaw Szustakowski, and Leszek Jaroszewicz. "Theoretical Analysis Of A Sagnac Fiber Optic Interferometer." In Interferometry '89, edited by Zbigniew Jaroszewicz, Maksymilian Pluta, Zbigniew Jaroszewicz, and Maksymilian Pluta. SPIE, 1990. http://dx.doi.org/10.1117/12.961284.

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Li, Jia-Rui, Chen-Zhi Yuan, Si Shen, Zi-Chang Zhang, He-Qing Wang, Hao Li, Li-Xing You, et al. "Generation of frequency entangled two-photon states in Sagnac interferometer." In CLEO: QELS_Fundamental Science. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_qels.2022.fw1a.2.

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xuemin, zhang, Li tian-yue, and Song xing. "Automatic precise alignment of Sagnac interferometer." In Fourth Seminar on Novel Optoelectronic Detection Technology and Application, edited by Weiqi Jin and Ye Li. SPIE, 2018. http://dx.doi.org/10.1117/12.2315428.

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Udd, Eric. "Sagnac Interferometer Based Secure Communication Systems." In Optical Fiber Sensors. Washington, D.C.: OSA, 1996. http://dx.doi.org/10.1364/ofs.1996.th344.

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Kondrat, Marcin, Mieczyslaw Szustakowski, and Norbert Palka. "Sagnac-Michelson Interferometer as Perimeter Sensor." In Optical Fiber Sensors. Washington, D.C.: OSA, 2006. http://dx.doi.org/10.1364/ofs.2006.the5.

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