Sensitive magnetometers based on dark states

Moi, L.; Cartaleva, S.

doi:10.1051/epn/2012603

Cited by 8 publications

(3 citation statements)

References 9 publications

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“…Second, the absolute value of the magnetic field is also of importance for some geophysical studies. In particular, dark-state magnetometers, based on coherent superposition of ground Zeeman sub-levels by frequency-modulated laser light, are a new type of magnetometer whose sensor consists only of a glass cell containing alkali atoms irradiated by a diode laser beam [94]. Such sensors have a potential for enhanced accuracy of absolute magnetic field measurement, because no magnetic field can be induced in the sensor itself during the measurements since the laser diode current is modulated by RF frequencies, then no coil is required around the cell.…”

Section: Jia Du Csiromentioning

confidence: 99%

Superconductivity and the environment: a Roadmap

Nishijima

Eckroad

Marian

et al. 2013

Supercond. Sci. Technol.

125

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There is universal agreement between the United Nations and governments from the richest to the poorest nations that humanity faces unprecedented global challenges relating to sustainable energy, clean water, low-emission transportation, coping with climate change and natural disasters, and reclaiming use of land. We have invited researchers from a range of eclectic research areas to provide a Roadmap of how superconducting technologies could address these major challenges confronting humanity.Superconductivity has, over the century since its discovery by Kamerlingh Onnes in 1911, promised to provide solutions to many challenges. So far, most superconducting technologies are esoteric systems that are used in laboratories and hospitals. Large science projects have long appreciated the ability of superconductivity to efficiently create high magnetic fields that are otherwise very costly to achieve with ordinary materials. The most successful applications outside of large science are high-field magnets for magnetic resonance imaging, laboratory

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Section: Jia Du Csiromentioning

confidence: 99%

Superconductivity and the environment: a Roadmap

Nishijima

Eckroad

Marian

et al. 2013

Supercond. Sci. Technol.

125

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“…In recent years, sensitive magnetometers have been used in many fields, such as biomedicine [ 1 , 2 ], Magnetic Resonance Imaging (MRI) [ 3 , 4 ], material science [ 5 , 6 ], geography [ 7 , 8 ], basic physics [ 9 , 10 , 11 , 12 ] and magnetic induction tomography [ 13 ]. With the rapid developments of quantum manipulation technology and photoelectric detection technology, the spin-exchange relaxation-free (SERF) atomic magnetometer [ 14 ] with ultrahigh theoretical sensitivity has received considerable attention, and it has been a hot research area [ 15 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Measurement Sensitivity Improvement of All-Optical Atomic Spin Magnetometer by Suppressing Noises

Chen

Zhang

Zou

2016

Sensors

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Quantum manipulation technology and photoelectric detection technology have jointly facilitated the rapid development of ultra-sensitive atomic spin magnetometers. To improve the output signal and sensitivity of the spin-exchange-relaxation-free (SERF) atomic spin magnetometer, the noises influencing on the output signal and the sensitivity were analyzed, and the corresponding noise suppression methods were presented. The magnetic field noises, including the residual magnetic field noise and the light shift noise, were reduced to approximately zero by employing the magnetic field compensation method and by adjusting the frequency of the pump beam, respectively. With respect to the operation temperature, the simulation results showed that the temperature of the potassium atomic spin magnetometer realizing the spin-exchange relaxation-free regime was 180 °C. Moreover, the fluctuation noises of the frequency and the power were suppressed by using the frequency and the power stable systems. The experimental power stability results showed that the light intensity stability was enhanced 10%. Contrast experiments on the sensitivity were carried out to demonstrate the validity of the suppression methods. Finally, a sensitivity of 13 fT/Hz1/2 was successfully achieved by suppressing noises and optimizing parameters.

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“…The best reported sensitivity up to now is 9.9 pT∕ Hz p [38]. The features and the state of the art make it possible to put such devices into practice in various applications like aeromagnetic surveying, space magnetic surveying, cardinal magnetic detection, and earthquake prediction [9,26,35,[39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Loop-locked coherent population trapping magnetometer based on a fiber electro-optic modulator

Feng

et al. 2014

Appl. Opt.

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We have set up a coherent population trapping (CPT)-based magnetometer prototype with the D1 line of ⁸⁷Rb atoms. The dichromatic light field is derived from a fiber electro-optic modulator (FEOM) connected to an external cavity laser diode. A CPT resonance signal with a 516 Hz linewidth is observed. By feeding back the derivative of the resonance curve to the FEOM with a proportional integral controller, of which the voltage output is directly converted to the measured magnetic field intensity, the resonance peak is locked to the environmental magnetic field. The measurement data we have achieved are well matched with the data measured by a commercial fluxgate magnetometer within 2 nT, and the sensitivity is better than 8 pT/√Hz in a parallel B field.

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Sensitive magnetometers based on dark states

Cited by 8 publications

References 9 publications

Superconductivity and the environment: a Roadmap

Superconductivity and the environment: a Roadmap

Measurement Sensitivity Improvement of All-Optical Atomic Spin Magnetometer by Suppressing Noises

Loop-locked coherent population trapping magnetometer based on a fiber electro-optic modulator

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