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saturated absorption spectrum of cesium micrometric-thin cell with suppressed crossover spectral lines

Chinese Physics B 2023年第7期32卷 353-360页

作者：韩俊龙王博闻郑俊鹤陈书源肖伟吴腾郭弘彭翔 School of Electronics Peking UniversityBeijing 100871China Center for Quantum Information Technology Peking UniversityBeijing 100871China

Micrometric-thin cells(MCs)with alkali vapor atoms have been valuable for research and applications of hyperfine Zeeman splitting and atomic magnetometers under strong magnetic *** theoretically and experimentally study the saturated absorption spectra using a 100-μm cesium MC,where the pump and probe beams are linearly polarized with mutually perpendicular polarizations,and the magnetic field is along the pump *** of the distinctive thin chamber of the MC,crossover spectral lines in saturated absorption spectra are largely suppressed leading to clear splittings of hyperfine Zeeman transitions in experiments,and the effect of spatial magnetic field gradient is expected to be reduced.A calculation method is proposed to achieve good agreements between theoretical calculations and experimental *** method successfully explains the suppression of crossover lines in MCs,as well as the effects of magnetic field direction,propagation and polarization directions of the pump/probe beam on saturated absorption *** saturated absorption spectrum with suppressed crossover lines is used for laser frequency stabilization,which may provide the potential value of MCs for high spatial resolution strong-field magnetometry with high sensitivity.

关键词： micrometric-thin cells saturated absorption spectrum hyperfine Zeeman splitting crossover spectral lines laser frequency stabilization

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An abnormal phenomenon in the saturated absorption spectrum of ^87Rb

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Chinese Physics B 2003年第11期12卷 1225-1228页

作者：贺凌翔王育竹 ShanghaiInstituteo[OpticsandFineMechanics ChineseAcademyofSciencesShanghai201800China

A polarization-type saturated absorption spectrum set-up for 87Rb atom laser cooling and trapping has been established in our laboratory. By changing the polarization components and optical power, enhanced absorption of the transition 5S1/2 F=2 → 5P3/2 F'=3 was observed with other transitions and cross-over resonance staying unvaried.

关键词： energy level fine structure saturated absorption spectrum enhanced absorption

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In situ temperature measurement of vapor based on atomic speed selection

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Chinese Physics B 2023年第2期32卷 189-192页

作者：于露曹俐岳子骞李林翟跃阳 School of Instrument Science and Opto-electronics Engineering Beihang UniversityBeijing 100191China Research Institute of Frontier Science Beihang UniversityBeijing 100191China

We demonstrate an experimental method for the in situ temperature measurement of atomic vapor using the saturated absorption spectrum. By separately manipulating the frequency of the pump and probe beams, the position of the crossover peaks can move along the spectrum. Different velocity classes of atoms contribute to the crossover during the movement. We study the relationship between the intensity change of peaks and vapor temperature. Our experimental result around room temperature shows a deviation of less than 0.3 K. Compared with traditional thermometry using absorption spectroscopy, higher accuracy can theoretically be achieved with real-time thermometry.

关键词： temperature measurement saturated absorption spectrum Doppler broadening atomic velocity distribution

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