Absolute frequency measurement of rubidium 
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 transitions

Glaser, Conny; Karlewski, Florian; Kluge, J.; Grimmel, Jens; Kaiser, Manuel; Günther, Andreas; Hattermann, Helge; Krutzik, Markus; Fortágh, József

doi:10.1103/physreva.102.012804

Cited by 27 publications

(19 citation statements)

References 26 publications

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“…The ultra-stable 420 nm laser is used as a pump source, which pumps Rb atoms from 5S 1∕2 state to 6P 3∕2 state. The atoms will decay to the 6S 1∕2 state from 6P 3∕2 state, and the population inversion between 6S 1∕2 state and 5P 3∕2 state will occur owing to the longer lifetime of the 6S 1∕2 state [37][38][39]57]. Under the effect of the bad cavity [50], the 1367 nm active optical signal output will be realized.…”

Section: Active Optical Frequency Standardmentioning

confidence: 99%

“…Frequency-stabilized lasers working on Rb [34], K [35], He [36] based on MTS method have also been reported. In particular, with more and more theoretical and experimental studies on Rb 420 nm 5S 1∕2 to 6P 3∕2 transition [37][38][39][40][41][42], it is well known that the natural linewidth of Rb 420 nm transition is narrow. Therefore, frequencystabilized laser working on Rb 420 nm transition based on MTS method is also a promising alternative for compact frequency standard for various applications [43].…”

Section: Introductionmentioning

confidence: 99%

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Stabilizing diode laser to 1 Hz-level Allan deviation with atomic spectroscopy for Rb four-level active optical frequency standard

et al. 2019

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We achieve a compact ultra-stable 420 nm blue diode laser system by immediately stabilizing the laser on the hyperfine transition line of Rb atom. The Allan deviation of the residual error signal reaches 1 Hz-level Allan deviation within 1 s averaging time, and the fractional frequency Allan deviation is 1.4 × 10 −15 ∕ √ , which shows the best result of frequencystabilized lasers based on the atomic spectroscopy without Pound-Drever-Hall (PDH) system. The signal-to-noise ratio of the atomic spectroscopy is evaluated to be 3,000,000 from the Allan deviation formula, which is the highest record, to the best of our knowledge. The frequency noise suppression characterization is demonstrated and the maximal noise suppression can be near 40 dB at 6 Hz. As a good candidate of pumping source, the ultra-stable 420 nm diode laser is successfully used in our Rb four-level active optical frequency standard system. The method can be easily extended to other wavelengths ultra-stable lasers with a Allan deviation of 10 −15 level retaining an atomic reference with low cost and low complexity while in the absence of an expensive and complicated PDH system.

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Section: Active Optical Frequency Standardmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stabilizing diode laser to 1 Hz-level Allan deviation with atomic spectroscopy for Rb four-level active optical frequency standard

et al. 2019

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“…The blue transition (5S 1/2 → 6P 3/2 ) at 420 nm is weak and the infrared (IR) transition (5S 1/2 → 5P 3/2 ) at 780 nm is strong. The direct detection of absorption on the weak blue transition [13,14] is a bit challenging and hence the double-resonance spectroscopy [8,[15][16][17][18] is commonly used which again suffers through partial Doppler broadening. The previously double resonance spectroscopy at 420 nm and 780 nm in Rb was mainly done in 87 Rb due to the limitation posed by the residual Doppler broadening effect [8,15,17,18].…”

Section: Introductionmentioning

confidence: 99%

Resolving closely spaced levels for Doppler mismatched double resonance

Nyakang'o,

Pandey

2021

Preprint

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In this paper, we present experimental techniques to resolve the closely spaced hyperfine levels of a weak transition by eliminating the residual/partial two-photon Doppler broadening and crossover resonances in a wavelength mismatched double resonance spectroscopy. The elimination of the partial Doppler broadening is based on velocity induced population oscillation (VIPO) and velocity selective saturation (VSS) effect followed by the subtraction of the broad background of the twophoton spectrum. Since the VIPO and VSS effect are the phenomena for near zero velocity group atoms, the subtraction gives rise to Doppler-free peaks and the closely spaced hyperfine levels of the 6P 3/2 state in Rb are well resolved. The double resonance experiment is conducted on 5S 1/2 → 5P 3/2 strong transition (at 780 nm) and 5S 1/2 → 6P 3/2 weak transition (at 420 nm) at room temperature.

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“…Measuring the hyperfine splitting of 6P 1/2 adds important input to theoretical calculations [7]. The hyperfine splitting measurement of 6P states has been carried out using saturated absorption [14] for both 6P 1/2 and 6P 3/2 states, or fluorescence spectroscopy [15] for the 6P 3/2 state on…”

Section: Introductionmentioning

confidence: 99%

“…The direct detection of absorption of 421 nm on  5S 6P 1 2 1 2 transition requires heating a Rb vapor cell up to 80°C-100°C [14,17] and using a photodiode with blue enhanced sensitivity. The spectroscopy at 421 nm can also be carried out using double-resonance spectroscopy [18][19][20][21][22][23], which does not require heating of the Rb vapor cell.…”

Section: Introductionmentioning

confidence: 99%

Hyperfine measurement of the 6P_1/2 state in ⁸⁷Rb using double resonance on blue and IR transition

Nyakang’o

Shylla

Natarajan

et al. 2020

J. Phys. B: At. Mol. Opt. Phys.

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In this paper, we present the spectroscopy of the 6P 1/2 state in 87 Rb using a double-resonance technique at 780 nm and 421 nm. The double-resonance technique is implemented using electromagnetically induced transparency (EIT) and optical pumping methods. Using these spectroscopy methods, we have measured the hyperfine splitting of the 6P 1/2 state with precision of <400 kHz, which agrees well with other spectroscopy methods such as electrical discharge and saturated absorption spectroscopy at 421 nm.

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Absolute frequency measurement of rubidium 5S−6P transitions

Cited by 27 publications

References 26 publications

Stabilizing diode laser to 1 Hz-level Allan deviation with atomic spectroscopy for Rb four-level active optical frequency standard

Stabilizing diode laser to 1 Hz-level Allan deviation with atomic spectroscopy for Rb four-level active optical frequency standard

Resolving closely spaced levels for Doppler mismatched double resonance

Hyperfine measurement of the 6P_1/2 state in ⁸⁷Rb using double resonance on blue and IR transition

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Absolute frequency measurement of rubidium 5S−6P transitions

Cited by 27 publications

References 26 publications

Stabilizing diode laser to 1 Hz-level Allan deviation with atomic spectroscopy for Rb four-level active optical frequency standard

Stabilizing diode laser to 1 Hz-level Allan deviation with atomic spectroscopy for Rb four-level active optical frequency standard

Resolving closely spaced levels for Doppler mismatched double resonance

Hyperfine measurement of the 6P1/2 state in 87Rb using double resonance on blue and IR transition

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Hyperfine measurement of the 6P_1/2 state in ⁸⁷Rb using double resonance on blue and IR transition