Collisional broadening and shift of the rubidium D1 and D2 lines () by rare gases, H2, D2, N2, CH4 and CF4

Rotondaro, Matthew D.; Perram, Glen P.

doi:10.1016/s0022-4073(96)00147-1

Cited by 135 publications

(80 citation statements)

References 14 publications

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“…In order to enhance atomic density and thus the contrast of the absorption, the cells were heated to 70 C. The In-bonded evacuated cell shows narrow, only Doppler-broadened absorption lines indicating proper hermetic enclosure of atomic Rb. The buffer-gas cell shows collisional broadening and a negative frequency shift of the absorption lines (both in the order of few MHz/mbar), 19 which confirms the presence of buffer-gas in this cell.…”

Section: A Linear Spectroscopysupporting

confidence: 57%

Low-temperature indium-bonded alkali vapor cell for chip-scale atomic clocks

Straessle

Pellaton

Affolderbach

et al. 2013

Journal of Applied Physics

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A low-temperature sealing technique for micro-fabricated alkali vapor cells for chip-scale atomic clock applications is developed and evaluated. A thin-film indium bonding technique was used for sealing the cells at temperatures of 140 C. These sealing temperatures are much lower than those reported for other approaches, and make the technique highly interesting for future micro-fabricated cells, using anti-relaxation wall coatings. Optical and microwave spectroscopy performed on first indium-bonded cells without wall coatings are used to evaluate the cleanliness of the process as well as a potential leak rate of the cells. Both measurements confirm a stable pressure inside the cell and therefore an excellent hermeticity of the indium bonding. The double-resonance measurements performed over several months show an upper limit for the leak rate of 1.5 Â 10 À13 mbarÁl/s. This is in agreement with additional leak-rate measurements using a membrane deflection method on indium-bonded test structures.

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Section: A Linear Spectroscopysupporting

confidence: 57%

Low-temperature indium-bonded alkali vapor cell for chip-scale atomic clocks

Straessle

Pellaton

Affolderbach

et al. 2013

Journal of Applied Physics

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“…• C. The average velocity of a rubidium atom is 300 m/s, the Doppler width is 320 MHz and the width of the rubidium atoms in nitrogen buffer gas is Γ/(2π) = 3.7 GHz [20], which is about 600 times larger than the natural width [19]. In the buffer gas, the width of the rubidium resonance is larger than the hyperfine level splittings, thereby reducing the system to a two level system to a good approximation.…”

Section: Observed Spectra Of Atoms In Buffer Gasmentioning

confidence: 99%

Observing random walks of atoms in buffer gas through resonant light absorption

Aoki

Mitsui

2016

Phys. Rev. A

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Using resonant light absorption, random walk motions of rubidium atoms in nitrogen buffer gas are observed directly. The transmitted light intensity through atomic vapor is measured and its spectrum is obtained, down to orders of magnitude below the shot noise level to detect fluctuations caused by atomic motions. To understand the measured spectra, the spectrum for atoms performing random walks in a gaussian light beam is computed and its analytical form is obtained. The spectrum has 1/f 2 (f : frequency) behavior at higher frequencies, crossing over to a different, but well defined behavior at lower frequencies. The properties of this theoretical spectrum agree excellently with the measured spectrum. This understanding also enables us to obtain the diffusion constant, the photon cross section of atoms in buffer gas and the atomic number density, from a single spectral measurement. We further discuss other possible applications of our experimental method and analysis.

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“…By adjusting the total buffer gas pressure in the resonance cell to around P ≈ 27 mbar, we shift the frequency of the optical pump transition, and thus, the point of α = 0 in the resonator cell with respect to its unperturbed value [32] so it coincides-within few megahertz-with the reference absorption line in the evacuated Rb cell used for laser stabilization (crossover CO 21-23, upwards arrow in Fig. 5).…”

Section: B Light Shiftmentioning

confidence: 99%

Experimental Demonstration of a Compact and High-Performance Laser-Pumped Rubidium Gas Cell Atomic Frequency Standard

Affolderbach

Droz²,

Mileti

2006

IEEE Trans. Instrum. Meas.

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Abstract-The authors present a compact high-performance laser-pumped Rubidium atomic frequency standard exploiting the advantages of laser optical pumping for improved stability. The clock is based on an industrial Rb clock with the lamp assembly removed and optically pumped by light from a compact frequency-stabilized laser head. The modification of the buffer gas filling in the clock resonance cell reduces instabilities on medium-term timescales arising from the ac Stark effect and temperature variations. The frequency stability of the demonstrator clock was measured to be better than 4 × 10

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Collisional broadening and shift of the rubidium D1 and D2 lines () by rare gases, H2, D2, N2, CH4 and CF4

Cited by 135 publications

References 14 publications

Low-temperature indium-bonded alkali vapor cell for chip-scale atomic clocks

Low-temperature indium-bonded alkali vapor cell for chip-scale atomic clocks

Observing random walks of atoms in buffer gas through resonant light absorption

Experimental Demonstration of a Compact and High-Performance Laser-Pumped Rubidium Gas Cell Atomic Frequency Standard

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