000231707 001__ 231707
000231707 005__ 20190509132617.0
000231707 0247_ $$2doi$$a10.5075/epfl-thesis-7859
000231707 02470 $$2urn$$aurn:nbn:ch:bel-epfl-thesis7859-7
000231707 02471 $$2nebis$$a11045682
000231707 037__ $$aTHESIS
000231707 041__ $$aeng
000231707 088__ $$a7859
000231707 245__ $$aResonant structures for vapor-cell atomic clocks
000231707 260__ $$bEPFL$$c2017$$aLausanne
000231707 269__ $$a2017
000231707 300__ $$a175
000231707 336__ $$aTheses
000231707 502__ $$aDr Sidi-Rachid Cherkaoui (président) ; professeure Anja Skrivervik Favre (directeur de thèse) ; Prof. Farhad Rachidi, Dr Laurent-Guy Bernier, Prof. Juraj Bartolic (rapporteurs)
000231707 520__ $$aVapor-cell atomic clocks based on double resonance are high-precision instruments that have strong potential for industrial commercialization. They offer performance which is superior to quartz oscillators and are already employed for synchronization-demanding applications in telecommunication and smart power grid networks. With a volume of up to few liters, these are devices compact enough to qualify for space applications related to global positioning. Moreover, a new generation of high-performance vapor-cell clocks based on Pulsed Optical Pumping scheme (POP) showed performance approaching that of much larger frequency standards. For the case of the pulsed clock, the magnetic field homogeneity plays a central role in limiting the performance -- in order to fully exploit the advantages of the novel POP scheme it is critical to apply a constant (amplitude) field distribution across the atomic sample. The main objective of the thesis is to find and characterize a cavity solution that is appropriate to apply in compact high-performance vapor-cell atomic clocks, and more particularly in the case of the pulsed optically pumped scheme. In the currently existing solutions a relatively large type of cavity is utilized for which in order to obtain field homogeneity a small fraction of the field is sampled. A major drawback of this approach is the negatively affected compactness. Moreover, such a cavity is more restrictive to the useful volume of the atomic sample, and it is more complicated to stabilize in terms of temperature. We propose a solution for which we managed to obtain a nearly constant microwave magnetic field distribution along the direction of the optical field with more than 97\% of orientation uniformity across the atomic sample. Our approach is to implement a cavity with artificial magnetic conductor boundary conditions in order to take advantage of a beneficial field mode with two zero variation indexes.
000231707 6531_ $$adouble resonance atomic clocks
000231707 6531_ $$ahigh-performance frequency standards
000231707 6531_ $$amicrowave cavities
000231707 6531_ $$ahomogeneous magnetic field distribution
000231707 6531_ $$aartificial magnetic conductor boundary conditions
000231707 700__ $$0246967$$g226788$$aIvanov, Anton Evgeniev
000231707 720_2 $$aSkrivervik Favre, Anja$$edir.$$g106441$$0242772
000231707 8564_ $$uhttps://infoscience.epfl.ch/record/231707/files/EPFL_TH7859.pdf$$zn/a$$s36302440$$yn/a
000231707 909C0 $$xU10374$$0252091$$pLEMA
000231707 909CO $$pthesis-bn2018$$pDOI$$ooai:infoscience.tind.io:231707$$qDOI2$$qGLOBAL_SET$$pthesis
000231707 917Z8 $$x108898
000231707 917Z8 $$x108898
000231707 918__ $$dEDEE$$cIEL$$aSTI
000231707 919__ $$aLEMA_2015
000231707 920__ $$b2017$$a2017-10-5
000231707 970__ $$a7859/THESES
000231707 973__ $$sPUBLISHED$$aEPFL
000231707 980__ $$aTHESIS