High-resolution diode-laser spectroscopy of calcium

Zibrov, A. S.; Fox, Richard W.; Ellingsen, Reinold; Weimer, Carl; Velichansky, V. L.; Tino, G. M.; Hollberg, L.

doi:10.1007/bf01081401

Cited by 28 publications

(10 citation statements)

References 27 publications

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“…The spectroscopic performance for Ca absorption at 657 nm is comparable to the NIST calcium beam cell. 7 The ratio of the saturated-absorption peak to the probe beam power was larger than that of the beam cell.…”

Section: Discussionmentioning

confidence: 96%

A calcium vapor cell for atomic spectroscopy

Huang

Shy

2002

Review of Scientific Instruments

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A calcium vapor cell used in laser spectroscopy usually suffers from calcium coating on the cell windows. To solve the problem, we add two mirrors in the cell to reflect the laser beam, then the calcium will coat on these mirrors instead of on the windows. Calcium coating degrades the reflectivity of the mirrors at the beginning, but the mirrors become calcium mirrors after a certain period of coating and their reflectivity will not change by further calcium coating. Using this cell in a conventional saturated-absorption spectroscopy, the observed saturated-absorption peak at 657 nm is about 2.4% of the probe beam power and its linewidth is below 300 kHz. Therefore, a portable secondary calcium-wavelength standard at 657 nm having an accuracy better than 1ϫ10 Ϫ11 is possible. In addition, our cell has a continuous working time longer than 3 d and it can be easily extended to 10 d.

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Section: Discussionmentioning

confidence: 96%

A calcium vapor cell for atomic spectroscopy

Huang

Shy

2002

Review of Scientific Instruments

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“…Later, this transition was investigated at various places e.g. at the National Research Laboratory ofMetrology, Japan [14], the National Institute of Standards and Technology [15], USA, the Tokyo Institute of Technology [16], Japan, in Torino, Italy [17], at Hsinchu, Taiwan [18], and at the PTB in Germany [19, 2OJ to give an extensive but not exhaustive list.…”

Section: Precision Spectroscopy With Cold Ca Atomsmentioning

confidence: 99%

Precision spectroscopy with ultracold atoms: measurement of optical frequencies

Helmcke

2003

SPIE Proceedings

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Precision laser spectroscopy at &=657 rim based on cold neutral Ca atoms released from a magneto-optical trap (MOT) is described. Systematic contributions to the uncertainty resulting from the residual velocity of the atoms and the acceleration in the gravitational field are determined and their influence is reduced by using a combination of different atom interferometers. The results are applied to an optical frequency standard based on Ca atoms. A fractional uncertainty in the measured clock frequency 2 . 1014 is observed. The application of a novel method for producing ultra-cold atoms showed in first atom interferometric measurements the potential to further reduce the uncertainty to below iO'5.

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“…For the absolute frequency of a transition to be determined, wg must be compared to an accepted frequency standard. We are now comparing the frequency of the 282 nm transition to a that of the narrow 'So -3 Pl intercombination line of Ca at 657 nm [57,58] by mixing a CO overtone line with the fundamental 563 nm light [59]. The NIST Ca standard has been compared to the Physikalisch-Technische Bundesanstalt, (PTB) Ca standard, which has in turn been compared to the 9.2 GHz line in Cs [60].…”

Section: Future Directionsmentioning

confidence: 99%

High-resolution, high-accuracy spectroscopy of trapped ions

Berkeland¹,

Miller²,

Cruz³

et al. 1999

The Sixteenth International Conference on Atomic Physics

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Microwave spectroscopy using trapped and cooled ions can achieve precision and accuracy comparable to the best cesium frequency standards. We discuss standards based on lg9Hg+ ions trapped in linear Paul traps: the Jet Propulsion Laboratory (JPL) standard, which uses up to lo7 atoms confined near the trap axis, and the recently evaluated NIST standard, which uses approximately ten ions laser cooled and crystalized on the trap axis. We consider future directions in trapped ion frequency standard work, including the use of entangled states for achieving higher precision, and progress on trapped ion optical frequency standards. Finally, we discuss scientific and technical applications of extremely stable frequency standards.

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High-resolution diode-laser spectroscopy of calcium

Cited by 28 publications

References 27 publications

A calcium vapor cell for atomic spectroscopy

A calcium vapor cell for atomic spectroscopy

Precision spectroscopy with ultracold atoms: measurement of optical frequencies

High-resolution, high-accuracy spectroscopy of trapped ions

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