Characteristics of a Novel Kind of Miniaturized Cavity-Cell Assembly for Rubidium Frequency Standards

Xia, Bo; Zhong, Da; An, Sensong; Mei, Ganghua

doi:10.1109/tim.2006.873786

Cited by 25 publications

(9 citation statements)

References 5 publications

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“…This condition corresponds to the cavity temperature of about 68°C, and the relative light intensity of 90%, and it is so-called zero light shift (ZLS) point. Further analyses and calculations indicate that under this condition, LS is 7E-12／10%, and TC is 1.5E-11 ／ o C. The TC is obtained in the cavity temperature region of 67～69 o C [5].…”

Section: B Light Shift and Temperature Coefficientmentioning

confidence: 73%

Investigation on physics package with slotted-tube microwave cavity for rubidium atomic frequency standard

Zhong

Xia

et al. 2009

2009 IEEE International Frequency Control Symposium Joint With the 22nd European Frequency and Time Forum

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In this paper, a unique physics package using slotted-tube cavity for rubidium atomic frequency standard has been described, including its structure, characteristics and performances. Due to the advantages of high cavity Q factor, large microwave filling factor, stable light intensity and so on, the physics package has obtained a high signal-to-noise ratio. The test results suggest that RAFS using this physics package has achieved an excellent short-term frequency stability of 1.2E-12／τ 1/2 (1s≤τ≤100s).

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Section: B Light Shift and Temperature Coefficientmentioning

confidence: 73%

Investigation on physics package with slotted-tube microwave cavity for rubidium atomic frequency standard

Zhong

Xia

et al. 2009

2009 IEEE International Frequency Control Symposium Joint With the 22nd European Frequency and Time Forum

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“…For the miniaturization of the clock, the size reduction of the MWR to well below the wavelength of the atomic transition (4.3 cm for the case of the 6.835 GHz transition in 87 Rb) has been a long-standing issue. Solutions such as the magnetron-type MWR [11], miniature MWR using lumped LC elements [12], or slotted-tube MWR [13] were developed for Rb cells down to ≈1 cm size. Only a very small number of microwave structures have been reported for use with micro-fabricated cells on the scale of few millimeters, which have been based on non-resonant strip-lines or micro coupling loops [10].…”

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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“…The microwave magnetic field distribution of the LGR, also named split-ring or slotted-tube resonator, 12,13 is interesting for frequency standards application where it is known as magnetron cavity.…”

Section: Introductionmentioning

confidence: 99%

Compact microwave cavity for high performance rubidium frequency standards

Stefanucci

Bandi

Merli

et al. 2012

Review of Scientific Instruments

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Analysis of the mode composition of an X-band overmoded O-type Cerenkov high-power microwave oscillator Phys. Plasmas 19, 103102 (2012) Gap independent coupling into parallel plate terahertz waveguides using cylindrical horn antennas J. Appl. Phys. 112, 073102 (2012) A band-pass filter approach within molecular dynamics for the prediction of intrinsic quality factors of nanoresonators J. Appl. Phys. 112, 074301 (2012) A research of W-band folded waveguide traveling wave tube with elliptical sheet electron beam Phys. Plasmas 19, 093117 (2012) Additional information on Rev. Sci. Instrum. The design, realization, and characterization of a compact magnetron-type microwave cavity operating with a TE 011 -like mode are presented. The resonator works at the rubidium hyperfine ground-state frequency (i.e., 6.835 GHz) by accommodating a glass cell of 25 mm diameter containing rubidium vapor. Its design analysis demonstrates the limitation of the loop-gap resonator lumped model when targeting such a large cell, thus numerical optimization was done to obtain the required performances. Microwave characterization of the realized prototype confirmed the expected working behavior. Double-resonance and Zeeman spectroscopy performed with this cavity indicated an excellent microwave magnetic field homogeneity: the performance validation of the cavity was done by achieving an excellent short-term clock stability as low as 2.4 × 10 −13 τ −1/2 . The achieved experimental results and the compact design make this resonator suitable for applications in portable atomic high-performance frequency standards for both terrestrial and space applications.

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Characteristics of a Novel Kind of Miniaturized Cavity-Cell Assembly for Rubidium Frequency Standards

Cited by 25 publications

References 5 publications

Investigation on physics package with slotted-tube microwave cavity for rubidium atomic frequency standard

Investigation on physics package with slotted-tube microwave cavity for rubidium atomic frequency standard

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

Compact microwave cavity for high performance rubidium frequency standards

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