Measuring the Stokes parameters for light transmitted by a high-density rubidium vapour in large magnetic fields

Weller, Lee; Dalton, Toryn; Siddons, Paul; Adams, Charles S.; Hughes, Ifan G.

doi:10.1088/0953-4075/45/5/055001

Cited by 27 publications

(28 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this paper we compare theory and experiment for the Faraday effect of an atomic vapour in the HPB regime, as defined in section 2. This extends previous work on absolute absorption [28] and dispersion [29] at high densities [30,31] and high magnetic fields [32].…”

Section: Introductionsupporting

confidence: 88%

The hyperfine Paschen–Back Faraday effect

Zentile

Andrews

Weller

et al. 2014

J. Phys. B: At. Mol. Opt. Phys.

Self Cite

View full text Add to dashboard Cite

We investigate experimentally and theoretically the Faraday effect in an atomic medium in the hyperfine Paschen-Back regime, where the Zeeman interaction is larger than the hyperfine splitting. We use a small permanent magnet and a micro-fabricated vapour cell, giving magnetic fields of the order of a tesla. We show that for low absorption and small rotation angles, the refractive index is well approximated by the Faraday rotation signal, giving a simple way to measure the atomic refractive index. Fitting to the atomic spectra, we achieve magnetic field sensitivity at the 10 −4 level. Finally we note that the Faraday signal shows zero crossings which can be used as temperature insensitive error signals for laser frequency stabilization at large detuning. The theoretical sensitivity for 87 Rb is found to be ∼ 40 kHz • C −1 .

show abstract

Section: Introductionsupporting

confidence: 88%

The hyperfine Paschen–Back Faraday effect

Zentile

Andrews

Weller

et al. 2014

J. Phys. B: At. Mol. Opt. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…A comparable representation is presented for atomic Rubidium in Ref. 22 . The initial polarizer and the analyser (by turned) are represented by two opposing Stokes vectors on the horizontal plane.…”

Section: Resultsmentioning

confidence: 99%

Na-Faraday rotation filtering: The optimal point

Kiefer

Löw

Wrachtrup

et al. 2014

Sci Rep

View full text Add to dashboard Cite

Narrow-band optical filtering is required in many spectroscopy applications to suppress unwanted background light. One example is quantum communication where the fidelity is often limited by the performance of the optical filters. This limitation can be circumvented by utilizing the GHz-wide features of a Doppler broadened atomic gas. The anomalous dispersion of atomic vapours enables spectral filtering. These, so-called, Faraday anomalous dispersion optical filters (FADOFs) can be by far better than any commercial filter in terms of bandwidth, transition edge and peak transmission. We present a theoretical and experimental study on the transmission properties of a sodium vapour based FADOF with the aim to find the best combination of optical rotation and intrinsic loss. The relevant parameters, such as magnetic field, temperature, the related optical depth, and polarization state are discussed. The non-trivial interplay of these quantities defines the net performance of the filter. We determine analytically the optimal working conditions, such as transmission and the signal to background ratio and validate the results experimentally. We find a single global optimum for one specific optical path length of the filter. This can now be applied to spectroscopy, guide star applications, or sensing.

show abstract

“…Atomic spectroscopy of thermal vapours in magnetic fields is extremely well-understood, and the absolute absorption in both low and high-density vapours [39,40], and magneto-optic effects [41][42][43][44] of thermal vapours of alkali-metal atoms have already been extensively studied. In fields below 10 mT, the Larmor precession frequency is sufficiently low to be measured directly [14].…”

Section: Introductionmentioning

confidence: 99%

Quantitative optical spectroscopy of ⁸⁷Rb vapour in the Voigt geometry in DC magnetic fields up to 0.4 T

Keaveney

Ponciano-Ojeda

Rieche

et al. 2019

J. Phys. B: At. Mol. Opt. Phys.

Self Cite

View full text Add to dashboard Cite

We present a detailed spectroscopic investigation of a thermal 87 Rb atomic vapour in magnetic fields up to 0.4 T in the Voigt geometry. We fit experimental spectra with our theoretical model ElecSus and find excellent quantitative agreement, with RMS errors of ∼ 0.3%. We extract the magnetic field strength and the angle between the polarisation of the light and the magnetic field from the atomic signal and find excellent agreement to within ∼ 1% with a commercial Hall probe. Finally, we present an investigation of the relative sensitivity of this technique to variations in the field strength and angle with a view to enabling atom-based high-field vector magnetometry.

show abstract

Measuring the Stokes parameters for light transmitted by a high-density rubidium vapour in large magnetic fields

Cited by 27 publications

References 30 publications

The hyperfine Paschen–Back Faraday effect

The hyperfine Paschen–Back Faraday effect

Na-Faraday rotation filtering: The optimal point

Quantitative optical spectroscopy of ⁸⁷Rb vapour in the Voigt geometry in DC magnetic fields up to 0.4 T

Contact Info

Product

Resources

About

Measuring the Stokes parameters for light transmitted by a high-density rubidium vapour in large magnetic fields

Cited by 27 publications

References 30 publications

The hyperfine Paschen–Back Faraday effect

The hyperfine Paschen–Back Faraday effect

Na-Faraday rotation filtering: The optimal point

Quantitative optical spectroscopy of 87Rb vapour in the Voigt geometry in DC magnetic fields up to 0.4 T

Contact Info

Product

Resources

About

Quantitative optical spectroscopy of ⁸⁷Rb vapour in the Voigt geometry in DC magnetic fields up to 0.4 T