Narrow structure in the coherent population trapping resonance in rubidium

Alipieva, E.; Gateva, S.; Taskova, E.; Cartaleva, S.

doi:10.1364/ol.28.001817

Cited by 35 publications

(32 citation statements)

References 9 publications

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“…Above this value, the resonance sign changes and a "dark" resonance is detected in both directions. The CPT resonance sign and width in an uncoated cell does not depend on the observation direction and the laser power and is "dark" [6]. The width of the CPT resonance in fluorescence detected along the E las is twice as narrow.…”

Section: Resultsmentioning

confidence: 95%

Transformation of the coherent population trapping resonance into enhanced fluorescence in a paraffin coated Rb vacuum cell

Taskova

Alipieva²,

Todorov

2012

J. Phys.: Conf. Ser.

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Section: Resultsmentioning

confidence: 95%

Transformation of the coherent population trapping resonance into enhanced fluorescence in a paraffin coated Rb vacuum cell

Taskova

Alipieva²,

Todorov

2012

J. Phys.: Conf. Ser.

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“…As the narrow structure is very sensitive to magnetic fields perpendicular to the polarization vector E(≡E z ) and B scan (≡B x ) (Alipieva et al, 2003), magnetic fields B y of the order of 10 mG destroy it, while the theoretical evaluations and experimental results show, that at this magnetic fields the changes in the broader structure due to the HRPM influence are practically not affected. The comparison of the shape of the resonances observed at B y =0 (Fig.…”

Section: Theoretical Descriptionmentioning

confidence: 97%

“…2 dashed line curve). In order to obtain information about the processes leading to the narrow structure formation, measurement of the resonance shapes in all cells in dependence on the laser beam diameter, laser power density, additional constant magnetic fields, and the laser frequency position relative to the centre of the Doppler broadened line profile were performed (Alipieva et al, 2003). The analysis of the shapes, measured at the same geometry a b…”

Section: Experimental Shapesmentioning

confidence: 99%

“…In this case the diffusion-induced Ramsey narrowing is responsible for the narrow structure. If the signal is registered in fluorescence (Alipieva et al, 2003) the signal is mainly from atoms out of the laser beam volume, which interact with the Rayleigh scattered light. In this case the narrow component is Lorentzian and its width is defined by the relaxation time due to atomic collisions with the cell walls.…”

Section: Cpt Resonances and Rayleigh Scatteringmentioning

confidence: 99%

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Shape of the Coherent Population Trapping Resonances Registered in Fluorescence

Gateva¹,

Todorov²

2012

Photodetectors

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“…The polarization rotation signal with this autonomous frequency stabilized laser is shown as the magnetic field is scanned across the zero field. The illustrated magnetic field resonance is originated from the Zeeman coherence in degenerate two level systems [6,8,[13][14][15]. The linearly polarized light in sigma configuration can be viewed as a combination of σ + and σ -component, when its interaction with an atomic system is envisaged.…”

Section: Figure-2: the Reflected Signals By The Analyzer As A Functiomentioning

confidence: 99%

An atomic magnetometer with autonomous frequency stabilization and large dynamic range

Pradhan

Mishra

Behera

et al. 2015

Review of Scientific Instruments

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The operation of a high sensitive atomic magnetometer using resonant elliptically polarized light is demonstrated. The experimental geometry allows autonomous frequency stabilization of the laser, thereby offers compact operation of the overall device. The magnetometry is based on measurement of the zero magnetic field resonance in degenerate two level system using polarimetric detection and has a preliminary sensitivity of <10 pT/Hz 1/2 @ 1 Hz. The requirements for these specialized applications are very specific in terms of sensitivity, dynamic range, and sizes. For example, the biomedical application desires miniaturized sensor head where as overall size & weight of the device is of paramount importance for space application. For either biomedical or space application, the all optical magnetometer has an edge over RF magnetometer [5] due to possible reduction in sizes.The all optical magnetometer has two variant, one operating on degenerate two level systems and the other relying on quantum interference among distinct hyperfine levels. The measurement based on degenerate two level systems primarily operates as NMOR (non-linear magnetooptic rotation) or SERF (spin exchange relaxation free) magnetometer [6,7]. The preparation of the atomic system for these two techniques are different, however relies on similar detection scheme. Recently, Shah and Romalis have circumvented the requirement of the additional pump beam in the orthogonal direction to the probe beam for the operation of the SERF magnetometer by the use of an elliptically polarized light without compromising much on the sensitivity [8]. This magnetometer was operated at ~45 GHz away from the atomic resonance and the elliptically polarized light does the dual job of spin polarization and measurement of the magnetic field.The all optical magnetometer working on quantum interference between hyperfine states can be operated either in high field regime, where the separation between the coherent population trapping (CPT) states is a measure of magnetic field or in the low field regime utilizing the separation between the convoluted transmission and polarization rotation signal arising due to quantum interference [9][10][11][12]. The later techniques provide a unique possibility of simultaneous operation of atomic clock and atomic magnetometer apart from operational flexibility for magnetometry [12].Here we have envisaged a new experimental geometry for measurement of the magnetic field utilizing zero magnetic field resonance of the degenerate two level systems. It is based on the analyzer parallel to the polarizer configuration against conventional 45 0 among them as has been utilized for either NMOR or SERF magnetometer. We use conventional frequency modulation spectroscopy to improve the signal to noise ratio. The schematic experimental set-up is shown in Fig.-

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Narrow structure in the coherent population trapping resonance in rubidium

Cited by 35 publications

References 9 publications

Transformation of the coherent population trapping resonance into enhanced fluorescence in a paraffin coated Rb vacuum cell

Transformation of the coherent population trapping resonance into enhanced fluorescence in a paraffin coated Rb vacuum cell

Shape of the Coherent Population Trapping Resonances Registered in Fluorescence

An atomic magnetometer with autonomous frequency stabilization and large dynamic range

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