Study of laser-pumped double-resonance clock signals using a microfabricated cell

Pellaton, M.; Affolderbach, C.; Pétremand, Y.; Rooij, Nico de; Mileti, G.

doi:10.1088/0031-8949/2012/t149/014013

Cited by 28 publications

(23 citation statements)

References 11 publications

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“…The potential of a DR clock using a microfabricated alkali vapor cell (2D-cell with the inner dimensions of 5 mm in diameter and a height of 2 mm, see Figure 10(a)) filled with buffer gas was already demonstrated [20,21]. The corresponding clock's Allan deviations using laboratory electronics were measured to be 6x10 -11 τ -1/2 and < 2x10 -11 τ To further improve the performances and in view of future miniature DR clocks, a new miniature cell (3D-cell) was designed and microfabricated in collaboration with SAMLAB-EPFL [22].…”

Section: A 2d and 3d Microfabricated Cells And μ-Lgrmentioning

confidence: 99%

Double-resonance in alkali vapor cells for high performance and miniature atomic clocks

Bandi

Pellaton

Miletic

et al. 2012

2012 IEEE International Frequency Control Symposium Proceedings

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-We present two lines of investigations on vapor cell based laser-microwave double-resonance (DR) rubidium atomic frequency standards: a compact high-performance clock exhibiting σ y (τ) < 1.4x10 -13 τ -1/2 and a miniaturized clock with σ y (τ) < 1x10-11 τ -1/2. The applications of these standards are emphasized towards portable applications such as next generation GNSS, deep space missions and telecommunications. Other techniques for DR clocks are discussed in brief.

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Section: A 2d and 3d Microfabricated Cells And μ-Lgrmentioning

confidence: 99%

Double-resonance in alkali vapor cells for high performance and miniature atomic clocks

Bandi

Pellaton

Miletic

et al. 2012

2012 IEEE International Frequency Control Symposium Proceedings

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“…The μ-LGR was used for observing the DR signal of the 87 Rb clock transition. Laser light resonant with the Rb D2-line (780 nm) is sent through the μ-LGR containing a 4 mm-thick microfabricated Rb vapor cell [4], [10] (both held at 82°C). The light intensity transmitted through the cell is detected on the photodiode as a function of the microwave frequency injected into the μ-LGR, see Fig.…”

Section: Tests On Prototypementioning

confidence: 99%

“…several orders of magnitude better than a quartz oscillator of comparable size and power consumption. Most approaches to CSAC were based on the CPT scheme [2], while the classical optical-microwave double-resonance (DR) scheme [1], [4] -although allowing for better clock stability -was only rarely studied [5], [6]. In the DR scheme using a 87 Rb cell (see Fig.…”

Section: Introductionmentioning

confidence: 99%

Miniaturized microwave cavity for rubidium atomic frequency standards

Violetti

Affolderbach

Merli

et al. 2012

2012 42nd European Microwave Conference

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Abstract-In view of mobile and battery-powered applications, there is an increasing demand for more radically miniaturized and low-power atomic frequency standards. For the miniaturization of a double-resonance Rubidium atomic clocks, the size reduction of the microwave cavity or microwave resonator (MWR) to well below the wavelength of the atomic transition (6.835 GHz in the case of 87 Rb) has been a longstanding issue. In this paper we propose a new miniaturized MWR, the μ-LGR, that meets the requirements for the atomic clock application while the structure is very compact, and assembly can be performed using standard and potentially low-cost techniques. Concept of the proposed device was proven through simulation and prototypes were successfully tested, showing the μ-LGR to be suitable for the integration in a miniaturized atomic clock.

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“…Most approaches to CSACs have been based on the Coherent Population Trapping scheme (CPT) [5], while the classical optical-microwave double-resonance (DR) scheme [2], [8] has been only rarely studied [8]- [10]. Nevertheless, in comparison with CPT, the DR approach has several advantages: Thanks to the absence of non-resonant laser modulation sidebands, the DC background level of the signal is reduced, which reduces the detection noise and therefore improves on the signal-to-noise ratio of the clock signal.…”

Section: Introductionmentioning

confidence: 99%

The Microloop-Gap Resonator: A Novel Miniaturized Microwave Cavity for Double-Resonance Rubidium Atomic Clocks

et al. 2014

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Abstract-Nowadays mobile and battery-powered applications push the need for radically miniaturized and low-power frequency standards that surpass the stability achievable with quartz oscillators. For the miniaturization of double-resonance rubidium ( 87 Rb) atomic clocks, the size reduction of the microwave cavity or resonator (MWR) to well below the wavelength of the atomic transition (6.835 GHz for 87 Rb) is of high interest. Here, we present a novel miniaturized MWR, the μ-LGR, for use in a miniature DR atomic clock and designed to apply a well-defined microwave field to a microfabricated Rb cell that provides the reference signal for the clock. This μ-LGR consists of a loop-gap resonator-based cavity with very compact dimensions (<0.9 cm 3 ). The μ-LGR meets the requirements of the application and its fabrication and assembly can be performed using repeatable and low-cost techniques. The concept of the proposed device was proven through simulations, and prototypes were successfully tested. Experimental spectroscopic evaluation shows that the μ-LGR is well-suited for use in an atomic clock. In particular, a clock short-term stability of 7 × 10 −12 τ −1/2 was measured, which is better than for other clocks using microfabricated cells and competitive with stabilities of compact Rb clocks using conventional glass-blown cells.

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Study of laser-pumped double-resonance clock signals using a microfabricated cell

Cited by 28 publications

References 11 publications

Double-resonance in alkali vapor cells for high performance and miniature atomic clocks

Double-resonance in alkali vapor cells for high performance and miniature atomic clocks

Miniaturized microwave cavity for rubidium atomic frequency standards

The Microloop-Gap Resonator: A Novel Miniaturized Microwave Cavity for Double-Resonance Rubidium Atomic Clocks

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