Magnetic Field Measurement Using Peak-Locked Zeeman Coherent Population Trapping Resonance in Rubidium Vapor

Tripathi, Renu; Pati, G. S.

doi:10.1109/jphot.2019.2922831

Cited by 8 publications

(3 citation statements)

References 31 publications

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“…We develop an analytical theory for the temporal spinwave FP interferometry based upon the optical Bloch equations for our five-level double-Λ CPT system. Beyond identifying the central CPT-Ramsey fringe, our scheme could be directly used to measure clock transition frequency [9][10][11][12] and static magnetic field [13][14][15][16]. The temporal spinwave FP interferometry protocol could be also extended to other systems, such as, coherent storage of photons in EIT [45] and coherent control of internal spin states in diamond defects [6] or artificial atoms [46][47][48].…”

Section: Gp Pd2mentioning

confidence: 99%

“…Coherent population trapping (CPT) [1], a result of destructive quantum interference between different transition paths, is of great importance in quantum science and technology. CPT spectroscopy has been extensively employed in quantum engineering and quantum metrology, such as, all-optical manipulation [2][3][4][5][6][7], atomic cooling [8], atomic clocks [9][10][11][12], and atomic magnetometers [13][14][15][16]. To narrow the CPT resonance linewidth, one may implement Ramsey interferometry in which two CPT pulses are separated by an integration time of the dark state for a time duration T [10,17,18].…”

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confidence: 99%

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Temporal Spinwave Fabry-Perot Interferometry via Coherent Population Trapping

Fang,

Han,

Jiang

et al. 2020

Preprint

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Ramsey spectroscopy via coherent population trapping (CPT) is essential in precision measurements. The conventional CPT-Ramsey fringes contain numbers of almost identical oscillations and so that it is difficult to identify the central fringe. Here, we experimentally demonstrate a temporal spinwave Fabry-Pérot interferometry via double-Λ CPT of laser-cooled 87 Rb atoms. Due to the constructive interference of temporal spinwaves, the transmission spectrum appears as a comb of equidistant peaks in frequency domain and thus the central Ramsey fringe can be easily identified. From the optical Bloch equations for our five-level double-Λ system, the transmission spectrum is analytically explained by the Fabry-Pérot interferometry of temporal spinwaves. Due to small amplitude difference between the two Landé factors, each peak splits into two when the external magnetic field is not too weak. This "unexpected" peak splitting can be employed to measure an unknown magnetic field without involving magneto-sensitive transitions.

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Section: Gp Pd2mentioning

confidence: 99%

mentioning

confidence: 99%

Temporal Spinwave Fabry-Perot Interferometry via Coherent Population Trapping

Fang,

Han,

Jiang

et al. 2020

Preprint

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“…Indeed, the first CSAM was realized on a physics package having the same architecture as the first CSAC [ 9 ]. However, to separate the magnetically sensitive transition from the clock transition by many linewidths, the measured field had an offset of ~70 μT, and this has been the case for almost all other CPT-based magnetometers [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Chip-Scale Ultra-Low Field Atomic Magnetometer Based on Coherent Population Trapping

Hong

Park

Lee

et al. 2021

Sensors

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We report a chip-scale atomic magnetometer based on coherent population trapping, which can operate near zero magnetic field. By exploiting the asymmetric population among magnetic sublevels in the hyperfine ground state of cesium, we observe that the resonance signal acquires sensitivity to magnetic field in spite of degeneracy. A dispersive signal for magnetic field discrimination is obtained near-zero-field as well as for finite fields (tens of micro-tesla) in a chip-scale device of 0.94 cm3 volume. This shows that it can be readily used in low magnetic field environments, which have been inaccessible so far in miniaturized atomic magnetometers based on coherent population trapping. The measured noise floor of 300 pT/Hz1/2 at the zero-field condition is comparable to that of the conventional finite-field measurement obtained under the same conditions. This work suggests a way to implement integrated atomic magnetometers with a wide operating range.

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Temporal analog of Fabry-Pérot resonator via coherent population trapping

et al. 2021

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Ramsey spectroscopy via coherent population trapping (CPT) is essential in precision measurements. The conventional CPT-Ramsey fringes contain numbers of almost identical oscillations and so that it is difficult to identify the central fringe. Here we experimentally demonstrate a temporal analog of Fabry–Pérot resonator via double-Λ CPT of laser-cooled 87Rb atoms. By inserting a periodic CPT pulse train between the two CPT-Ramsey pulses, due to the constructive interference of spin coherence, the transmission spectrum appears as a comb of equidistant peaks in frequency domain and thus the central Ramsey fringe can be easily identified. From the five-level Bloch equations for our double-Λ system, we find that the multi-pulse CPT interference can be regarded as a temporal analog of Fabry–Pérot resonator. Because of the small amplitude difference between the two Landé g factors, each peak splits into two when the external magnetic field is not too weak. This splitting is exactly linear with the magnetic field strength and thus can be used for measuring a magnetic field without involving magneto-sensitive transitions.

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Magnetic Field Measurement Using Peak-Locked Zeeman Coherent Population Trapping Resonance in Rubidium Vapor

Cited by 8 publications

References 31 publications

Temporal Spinwave Fabry-Perot Interferometry via Coherent Population Trapping

Temporal Spinwave Fabry-Perot Interferometry via Coherent Population Trapping

Chip-Scale Ultra-Low Field Atomic Magnetometer Based on Coherent Population Trapping

Temporal analog of Fabry-Pérot resonator via coherent population trapping

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