A marginally stable optical resonator for enhanced atom interferometry

Riou, Isabelle; Mielec, N.; Lefevre, G.; Prevedelli, M.; Landragin, Arnaud; Bouyer, Philippe; Bertoldi, Andréa; Geiger, Rémi; Canuel, B.

doi:10.1088/1361-6455/aa7592

Cited by 32 publications

(42 citation statements)

References 35 publications

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“…As a final note in this discussion, we remark that the interest of using an optical cavity to drive the light pulses in an AI has been raised recently [46,47]. The power enhancement at the cavity resonance requires sufficient finesse  , which modifies the intensity build up time  t = L c 2 cav , and therefore the temporal shape of the pulse.…”

Section: Discussionmentioning

confidence: 95%

Improving the phase response of an atom interferometer by means of temporal pulse shaping

et al. 2018

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We study theoretically and experimentally the influence of temporally shaping the light pulses in an atom interferometer, with a focus on the phase response of the interferometer. We show that smooth light pulse shapes allow rejecting high frequency phase fluctuations (above the Rabi frequency) and thus relax the requirements on the phase noise or frequency noise of the interrogation lasers driving the interferometer. The light pulse shape is also shown to modify the scale factor of the interferometer, which has to be taken into account in the evaluation of its accuracy budget. We discuss the trade-offs to operate when choosing a particular pulse shape, by taking into account phase noise rejection, velocity selectivity, and applicability to large momentum transfer atom interferometry.

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Section: Discussionmentioning

confidence: 95%

Improving the phase response of an atom interferometer by means of temporal pulse shaping

et al. 2018

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“…The increase in sensitivity to alignment and vibrations near the stability boundary is not too big for the cavity configuration we are using [5]. Other solution to have a big waist includes adding a lens inside of a Fabry Perot cavity [7]. Using the ring cavity allows reaching a high-quality-factor, something important if one needs to have a high field and a very clean mode.…”

Section: Ring Cavity Designmentioning

confidence: 99%

“…The light for the HG 00 beam goes through a double pass acousto-optic modulator to shift the frequency of that beam by 230.00(4) MHz. We send this beam (with M 2 = 1.01 (7)) through lenses to mode match the beam to the ring cavity. The other path is coupled to the fiber (with polarization control) with the spiral plate at the end to produce the LG 10 mode.…”

Section: Flat-top Profile Synthesismentioning

confidence: 99%

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Experimental generation of a flat-top beam profile in a stable ring cavity

et al. 2019

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We create a spatially homogeneous field inside of a ring cavity by combining two transverse modes generated by a single laser through modulation. The interference term between the two modes averages out because of the frequency difference between them, eliminating the need for interferometric control of their relative phase. The use of a ring cavity allows for a large waist for the flat-top profile, big enough to cover the atoms in an atomic trap. The cavity is mechanically and thermally isolated, and the laser light is locked to the cavity using the Pound-Drever-Hall technique. The flat-top profile technique reported here fulfill the vanishing curvature criterion at the center of the profile.

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“…Ref. 45 ). We find that, in the quasi-Bragg regime, a variation of 10% in the two-photon Rabi frequency (proportional to laser intensity) leads to 20% of variation in the π pulse efficiency for a 6 k Bragg transition (as used, e.g., in Ref.…”

Section: Gain In Atom Inteferometer Performance With the Top-hat Beammentioning

confidence: 99%

Atom interferometry with top-hat laser beams

Mielec

Altorio

Chanu

et al. 2018

Applied Physics Letters

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The uniformity of the intensity and phase of laser beams is crucial to high-performance atom interferometers. Inhomogeneities in the laser intensity profile cause contrast reductions and systematic effects in interferometers operated with atom sources at micro-Kelvin temperatures, and detrimental diffraction phase shifts in interferometers using large momentum transfer beam splitters. We report on the implementation of a socalled top-hat laser beam in a long-interrogation-time cold-atom interferometer to overcome the issue of the inhomogeneous laser intensity encountered when using Gaussian laser beams. We characterize the intensity and relative phase profiles of the top-hat beam and demonstrate its gain in atom-optics efficiency over a Gaussian beam, in agreement with numerical simulations. We discuss the application of top-hat beams to improve the performance of different architectures of atom interferometers.

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A marginally stable optical resonator for enhanced atom interferometry

Cited by 32 publications

References 35 publications

Improving the phase response of an atom interferometer by means of temporal pulse shaping

Improving the phase response of an atom interferometer by means of temporal pulse shaping

Experimental generation of a flat-top beam profile in a stable ring cavity

Atom interferometry with top-hat laser beams

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