Absolute frequency measurement of rubidium 5S–7S two-photon transitions with a femtosecond laser comb

Chui, Hsiang‐Chen; Ko, Ming Sheng; Liu, Yi-Wei; Shy, Jow Tsong; Peng, Jinlong; Ahn, Hye Young

doi:10.1364/ol.30.000842

Cited by 48 publications

(41 citation statements)

References 9 publications

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“…Much experimental work has been done on measuring with high accuracy the absolute frequencies of various ground-state to singly-excited-state transitions in the two most prevalent rubidium isotopes, 85 Rb and 87 Rb [1][2][3][4][5][6][7]. In many cases, transition frequencies have been measured for both isotopes, allowing accurate determinations of the transition isotope shift.…”

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confidence: 99%

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Experimental isotope shifts of the 5 2S1/2state and low-lying excited states of Rb

2011

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By combining a recent precise measurement of the ionization energy of 87 Rb with previous measurements of the ground-state hyperfine structure and ionization energy of 85 Rb, an accurate value for the 85 Rb-87 Rb isotope shift of the 5 2 S 1/2 ground state can be determined. In turn, comparison with additional spectroscopic data makes it possible to evaluate isotope shifts for the low-lying excited states, which are accurate in most cases to about 1 MHz. For the 5 2 S 1/2 and 5 2 P 3/2 states, the specific mass-shift contribution can be determined in addition to the total shift. This information is particularly useful for spectroscopic analysis of transitions to Rydberg states and for tests of atomic theory.

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confidence: 99%

“…energies for the 85 Rb levels as extracted from Refs. [1][2][3][4][5][6][7], the isotopic masses from Ref. [20], and the remaining contribution due to the combined SMS and FS.…”

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confidence: 99%

Experimental isotope shifts of the 5 2S1/2state and low-lying excited states of Rb

2011

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“…The frequency comb used in this experiment was similar to our previous work [35]. In short, a mode-locked Ti:sapphire ring cavity (Gigaoptics, Gigajet 20) was pumped by a 5-W frequency-doubling Nd:YVO 4 laser at 532 nm (Spectra-Physics, Millennia V) to generate <50-fs pulses with a f r = 1 GHz repetition rate.…”

Section: Laser Systemsmentioning

confidence: 99%

Prospects of laser cooling in atomic thallium

et al. 2011

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One of the most precisely determined upper limits for the electron electric dipole moment (EDM) is set by the thallium (Tl) atomic beam experiment. One way to enhance the sensitivity of the atomic beam setup is to laser cool the Tl atoms to reduce the EDM-like phase caused by the E×v effect. In this report, a cooling scheme based on the 6P 3/2 (F = 2) ↔ 6D 5/2 (F = 3) transition in Tl is proposed. The absolute frequency measurement of this nearly closed-cycle transition was performed in an atomic beam apparatus. Two Ti:sapphire lasers were frequency-doubled using enhancement cavities in X-type configurations to provide the needed 377-and 352-nm light sources for the optical pumping and cooling transitions, respectively. The absolute frequency of this cooling transition is determined to be 851 634 646(56) MHz.

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“…The digital lock, a technique generally used in optical atomic clocks, allows for long interrogation of the nonmodulated reference beam with an optical frequency comb. That technique, and the good long-term stability of our system, reduce the statistical uncertainties of measured frequencies below 1 kHz, an order of magnitude better than in [2][3][4], thanks to the longer averaging times. The low statistical uncertainty enables studies of systematic shifts with accordingly higher precision.…”

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confidence: 94%

“…The ac-Stark effect in the 5S-7S transition is also smaller than in the 5S-5D case. Because of the difference in the signal strengths, all previous measurements of the 5S-7S transition [2][3][4][5] yielded absolute values of its frequency that were less accurate than for the 5S-5D transition [6][7][8][9]. In this Letter, we report the absolute frequency measurements for the 5S 1∕2 -7S 1∕2 transitions in 87 Rb and 85 Rb, with relative standard uncertainty less than 10 −11 , which is better than previously measured and comparable to measurements of the 5S-5D transition [6].…”

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confidence: 99%