Measuring the atomic recoil frequency using a modified grating-echo atom interferometer

Barrett, B.; Carew, A.; Beattie, Scott; Kumarakrishnan, A.

doi:10.1103/physreva.87.033626

Cited by 16 publications

(40 citation statements)

References 39 publications

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“…The simulation models the response of the atom to an applied optical field based on the semiclassical model of a multilevel atom 11 . An earlier rate equation description for a multilevel system is presented in Ref.…”

Section: Rate Equation Simulations Of Optical Pumpingmentioning

confidence: 99%

Investigations of optical pumping for magnetometry using an auto-locking laser system

Pouliot¹,

Beica

Carew

et al. 2018

Laser Technology for Defense and Security XIV

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We have developed a versatile pulsed laser system for high precision magnetometry. The operating wavelength of the system can be configured to optically pump alkali vapors such as rubidium and cesium. The laser system consists of an auto-locked, interference filter stabilized, external cavity diode laser (ECDL), a tapered waveguide amplifier, and a pulsing module. The auto-locking controller can be used by an untrained operator to stabilize the laser frequency with respect to a library of atomic, molecular, and solid-state spectral markers. The ECDL output can be amplified from 20 mW to 2 W in continuous wave (CW) mode. The pulsing module, which includes an acousto-optic modulator (AOM), can generate pulses with durations of 20 ns and repetition rates of several MHz. Accordingly, the laser system is well suited for applications such as gravimetry, magnetometry, and differential-absorption lidar. In this work, we focus on magnetometric applications and demonstrate that the laser source is suitable for optically pumping rubidium vapor. We also describe numerical simulations of optical pumping relevant to the rubidium D1 and D2 transitions at 795 nm and 780 nm respectively. These studies are relevant to the design and construction of a new generation of portable, rubidium, spinexchange relaxation-free (SERF) magnetometers, capable of sensitivities of 1 fT Hz -1/2 1 .

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Section: Rate Equation Simulations Of Optical Pumpingmentioning

confidence: 99%

Investigations of optical pumping for magnetometry using an auto-locking laser system

Pouliot¹,

Beica

Carew

et al. 2018

Laser Technology for Defense and Security XIV

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show abstract

“…Experiments utilizing the two-pulse AI, where the echo energy is measured as a function of T 21 , are described in Refs. [32,[54][55][56][57]76,77].…”

Section: Description Of Grating-echo-type Interferometersmentioning

confidence: 99%

“…This AI requires only a single excitation frequency, and does not require velocity selection. Recently, this configuration has achieved several milestones, including an extension of the timescale to the transit time limit (∼ 250 ms for experimental conditions) [32], as well as significant improvements in statistical precision relating to measurements of the atomic recoil frequency (related to h/M) [56,57] and the acceleration due to gravity [58]. In what follows, we review recent progress on both atomic recoil (Sec.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, in comparison to Raman interferometers, a phase-stable apparatus is not required to make high-precision measurements of ω q . We have developed a "modified" three-pulse echo AI 2 which exhibits increased sensitivity to atomic recoil compared to the aforementioned two-pulse configuration [57]. This modified geometry has been described in previous work using the formalism of coherence functions [100] and a full quantum-mechanical treatment that accurately describes the fringe shape [54,56,101].…”

Section: Introductionmentioning

confidence: 99%

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Prospects for Precise Measurements with Echo Atom Interferometry

Barrett

Carew

Beica

et al. 2016

Atoms

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Echo atom interferometers have emerged as interesting alternatives to Raman interferometers for the realization of precise measurements of the gravitational acceleration g and the determination of the atomic fine structure through measurements of the atomic recoil frequency ω q . Here we review the development of different configurations of echo interferometers that are best suited to achieve these goals. We describe experiments that utilize near-resonant excitation of laser-cooled rubidium atoms by a sequence of standing wave pulses to measure ω q with a statistical uncertainty of 37 parts per billion (ppb) on a time scale of ∼50 ms and g with a statistical precision of 75 ppb. Related coherent transient techniques that have achieved the most statistically precise measurements of atomic g-factor ratios are also outlined. We discuss the reduction of prominent systematic effects in these experiments using off-resonant excitation by low-cost, high-power lasers.

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“…constant [14][15][16][17][18], and the Newtonian gravitational constant [19][20][21][22]. On a more applied side, there has been much activity in the development of interferometers as sensors of acceleration , rotation [44][45][46][47], gravity gradients [48][49][50][51][52][53], magnetic fields and magnetic field gradients [54][55][56][57][58], and dual accelerometer/gyroscopes [59][60][61].…”

Section: Introductionmentioning

confidence: 99%

Representation-free description of atom interferometers in time-dependent linear potentials

et al. 2019

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In this article we present a new representation-free formalism, which can significantly simplify the analysis of interferometers comprised of atoms moving in time-dependent linear potentials. We present a methodology for the construction of two pairs of time-dependent functions that, once determined, lead to two conditions for the closing of the interferometer, and determine the phase and the contrast of the resultant interference. Using this new formalism, we explore the dependency of the interferometer phase on the interferometer time T for different atom interferometers. By now, it is well established that light pulse atom interferometers of the type first demonstrated by Kasevich and Chu (1991 Phys. Rev. Lett. 67, 181-4; Appl. Phys. B 54, 321-32), henceforth referred to as Mach-Zehnder (MZ) atom interferometers, have a phase scaling as T 2 . A few years ago, McDonald et al (2014 Europhys. Lett. 105, 63001) have experimentally demonstrated a novel type of atom interferometer, referred to as the continuous-acceleration bloch (CAB) interferometer, where the phase reveals a mixed scaling which is governed by a combination of T 2 and T 3 . Moreover, we have recently proposed a different type of atom interferometer (Zimmermann et al 2017 Appl . Phys. B 123, 102), referred to as the T 3 -interferometer, which has a pure T 3 scaling, as demonstrated theoretically. Finally, we conclude that the CAB interferometer can be shown to be a hybrid of the standard MZ interferometer and the T 3 -interferometer. Enhancing the sensitivity of atom interferometersBecause of their extreme interferometric sensitivity, atom interferometers have been used to precisely measure physical quantities such as the polarizability of alkali atoms [6-9], the 'magic wavelength' for potassium, rubidium and calcium [10-12], Planck's constant to the cesium mass ratio h/m Cs [13], the fine structure OPEN ACCESS RECEIVED

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Measuring the atomic recoil frequency using a modified grating-echo atom interferometer

Cited by 16 publications

References 39 publications

Investigations of optical pumping for magnetometry using an auto-locking laser system

Investigations of optical pumping for magnetometry using an auto-locking laser system

Prospects for Precise Measurements with Echo Atom Interferometry

Representation-free description of atom interferometers in time-dependent linear potentials

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