Vapor pressure of rubidium between 250 and 298 K determined by combined fluorescence and absorption measurements

Spek, Alex M. van der; Mulders, J.J.L.; Steenhuysen, L.W.G.

doi:10.1364/josab.5.001478

Cited by 10 publications

(4 citation statements)

References 13 publications

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“…The fluorescence method is a sensitive way to measure vapor density. In previous experiments, [14][15][16][17] the main error came from depopulation of the energy level, self-absorption, and broad bandwidth of the laser. In our experiment, the bandwidth of the laser L (300 kHz) is much smaller than the width of Doppler broadening of the 87 Rb vapor, so the inaccuracy from the broad-bandwidth effect was eliminated.…”

Section: Discussionmentioning

confidence: 98%

“…Fairbank et al [16] measured the density of sodium vapor at low temperature using resonance fluorescence measurement in 1974. In 1988, van der Spek et al [17] measured the vapor pressure of natural rubidium between 250 K and 298 K by combined fluorescence and absorption measurements. In these experiments, the main error stemmed from depopulation of the energy level, self-absorption, and broad bandwidth of the laser.…”

Section: Introductionmentioning

confidence: 99%

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Determination of the atomic density of rubidium-87

2015

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Atomic density is a basic and important parameter in quantum optics, nonlinear optics, and precision measurement. In the past few decades, several methods have been used to measure atomic density, such as thermionic effect, optical absorption, and resonance fluorescence. The main error of these experiments stemmed from depopulation of the energy level, self-absorption, and the broad bandwidth of the laser. Here we demonstrate the atomic density of 87 Rb vapor in paraffin coated cell between 297 K and 334 K mainly using fluorescence measurement. Optical pumping, anti-relaxation coating, and absorption compensation approaches are used to decrease measurement error. These measurement methods are suitable for vapor temperature at dozens of degrees. The fitting function for the experimental data of 87 Rb atomic density is given.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Determination of the atomic density of rubidium-87

2015

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“…The estimated Rb vapor pressure was 7.98 ´ 10 7 Torr and the number of atoms was 2.57 ´ 10 10 particles/cm 3 at 26.0 °C (room temperature) [15]. The Rb cell was cylindrical, its length and diameter both being 5 cm.…”

Section: Principle Of Frequency Stabilizationmentioning

confidence: 99%

“…Using the Rb-D 2 absorption line (frequency: 384 THz, wavelength: 780.02 nm) as an external frequency reference, we placed Rb (ratio of isotopes 85 Rb and 87 Rb is 7.2 : 2.8) in a glass container (Rb cell). The estimated Rb vapor pressure was 7.98 ´ 10 7 Torr and the number of atoms was 2.57 ´ 10 10 particles/cm 3 at 26.0 °C (room temperature) [15]. The Rb cell was cylindrical, its length and diameter both being 5 cm.…”

Section: Principle Of Frequency Stabilizationmentioning

confidence: 99%

Frequency stabilization of a semiconductor laser under direct FSK modulation: The modulation method and evaluation of stability

et al. 1998

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The frequency stability of a semiconductor laser deteriorated under direct frequency shift keying (FSK) when stabilization depended entirely upon an external frequency reference. Therefore, the PEAK method was devised for the purpose of improving frequency stability. This method requires two distinct frequency components and, therefore, will not work effectively in a communications system that produces a succession of identical frequencies, as does the FSK method on occasion. This paper, then, explains the results of our comparative analysis of the two modulation methods. The evaluation of frequency stability requires us to use a beat note between two stabilized laser beams, referred to here, as “signal” and “reference,” lasers. The reference laser is stabilized by a method that takes advantage of the magneto‐optical effect. This laser restrains the tendency of the beat note frequency to broaden in other stabilization methods, and even makes it possible to predetermine the beat frequency to be employed. The improvement in frequency stability obtained is about one order of magnitude. © 1998 Scripta Technica, Electr Eng Jpn, 125(2): 44–51, 1998

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Frequency stabilization of a semiconductor laser using the Faraday effect

Rikukawa

Satō

Nakagawa

et al. 1991

Electron Comm Jpn Pt II

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The frequency stabilization of a semiconductor laser using an absorption line of atoms or molecules has usually been performed by applying a small modulation directly to the injection current. This paper reports one of the frequency stabilization methods without a direct small modulation. This stabilization method uses the Faraday effect to obtain a control signal which is fed back to the injection current. The obtained stability is almost the same value as that in the method using direct modulation.

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Vapor pressure of rubidium between 250 and 298 K determined by combined fluorescence and absorption measurements

Cited by 10 publications

References 13 publications

Determination of the atomic density of rubidium-87

Determination of the atomic density of rubidium-87

Frequency stabilization of a semiconductor laser under direct FSK modulation: The modulation method and evaluation of stability

Frequency stabilization of a semiconductor laser using the Faraday effect

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