Laser pumped He4 magnetometer

Gilles, H.; Hamel, J.; Chéron, B.

doi:10.1063/1.1364667

Cited by 49 publications

(28 citation statements)

References 22 publications

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“…The latter technique is, however, restricted to Rb and cannot be applied to other alkalis. As mentioned above, linearly polarized laser radiation is an efficient means for producing alignment and a discussion of linearly polarized laser pumping in metastable 4 He can be found in [7,13]. These authors have investigated several magnetometry techniques using both orientation and alignment signals and they observed magnetic resonances involving alignment using rf fields, light intensity modulation, polarization modulation, and frequency modulation.…”

Section: B Droms and Dramsmentioning

confidence: 99%

Theory of double resonance magnetometers based on atomic alignment

2006

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We present a theoretical study of the spectra produced by optical/radio-frequency double resonance devices, in which resonant linearly polarized light is used in the optical pumping and detection processes. We extend previous work by presenting algebraic results which are valid for atomic states with arbitrary angular momenta, arbitrary rf intensities, and arbitrary geometries. The only restriction made is the assumption of low light intensity. The results are discussed in view of their use in optical magnetometers.

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Section: B Droms and Dramsmentioning

confidence: 99%

Theory of double resonance magnetometers based on atomic alignment

2006

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“…These technical advances have enabled atomic magnetometers to achieve sensitivities rivaling [8,9,10,11] and even surpassing [12] that of most Superconducting Quantum Interference Device (SQUID) based magnetometers that have dominated the field of sensitive magnetometers for a number of years [13]. Atomic magnetometers have the intrinsic advantage of not requiring cryogenic cooling, and offer a significant potential for miniaturization.…”

mentioning

confidence: 99%

Optical magnetometry

2007

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Some of the most sensitive methods of measuring magnetic fields utilize interactions of resonant light with atomic vapor. Recent developments in this vibrant field are improving magnetometers in many traditional areas such as measurement of geomagnetic anomalies and magnetic fields in space, and are opening the door to new ones, including, dynamical measurements of bio-magnetic fields, detection of nuclear magnetic resonance (NMR), magnetic-resonance imaging (MRI), inertialrotation sensing, magnetic microscopy with cold atoms, and tests of fundamental symmetries of Nature.

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“…Over the past few decades, magnetometers based on superconducting quantum interference devices (SQUIDs) have been the most sensitive magnetic field sensors [12]. In recent years, however, significant technical advances have enabled atomic magnetometers to achieve sensitivities rivaling [13,14,15,16,17,18] and even surpassing [19] that of most SQUID-based magnetometers. Atomic magnetometers have the intrinsic advantage of not requiring cryogenic cooling, and efficient methods for microfabrication of atomic magnetometers (with dimensions ∼ 1 mm) have recently been developed [20,21].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear magneto-optical rotation with frequency-modulated light in the geophysical field range

Acosta

Ledbetter²,

Rochester³

et al. 2006

Phys. Rev. A

113

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Recent work investigating resonant nonlinear magneto-optical rotation (NMOR) related to longlived (τ rel ∼ 1 s) ground-state atomic coherences has demonstrated potential magnetometric sensitivities exceeding 10 −11 G/ √ Hz for small ( < ∼ 1 µG) magnetic fields. In the present work, NMOR using frequency-modulated light (FM NMOR) is studied in the regime where the longitudinal magnetic field is in the geophysical range (∼ 500 mG), of particular interest for many applications. In this regime a splitting of the FM NMOR resonance due to the nonlinear Zeeman effect is observed. At sufficiently high light intensities, there is also a splitting of the FM NMOR resonances due to ac Stark shifts induced by the optical field, as well as evidence of alignment-to-orientation conversion type processes. The consequences of these effects for FM-NMOR-based atomic magnetometry in the geophysical field range are considered.

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Laser pumped He4 magnetometer

Abstract: We describe the realization of a 4He magnetometer based on optical pumping with an optical frequency modulated laser diode light. Performances (amplitude and frequency spatial isotropy and sensitivity) of our device are presented and compared with those of other scalar magnetometers.

Cited by 49 publications

References 22 publications

Theory of double resonance magnetometers based on atomic alignment

Theory of double resonance magnetometers based on atomic alignment

Optical magnetometry

Nonlinear magneto-optical rotation with frequency-modulated light in the geophysical field range

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