1994
DOI: 10.1049/el:19940461
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Short-term stability of laser-pumped rubidium gas cell frequency standard

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Cited by 16 publications
(6 citation statements)
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“…The ac Stark shift or "light shift" of the clock transition induced by the pump light field [13], [14] constitutes a major source of instabilities in optically pumped atomic clocks [5], [8]. In the case of low pump light intensities present in optically pumped clocks, the interaction between the light field and the atomic levels causes the clock transition frequency f C to exhibit a dispersive shape as a function of the pump-light laser frequency ν L .…”
Section: B Light Shiftmentioning
confidence: 99%
“…The ac Stark shift or "light shift" of the clock transition induced by the pump light field [13], [14] constitutes a major source of instabilities in optically pumped atomic clocks [5], [8]. In the case of low pump light intensities present in optically pumped clocks, the interaction between the light field and the atomic levels causes the clock transition frequency f C to exhibit a dispersive shape as a function of the pump-light laser frequency ν L .…”
Section: B Light Shiftmentioning
confidence: 99%
“…From the measured double-resonance signals at the low pump light powers used, we derive a shot-noise limit for the short-term stability to be around 2•10 -13 -1/2 [3] and an overall stability limit around 1•10 -12 -1/2 [12]. Still better signal contrast up to 60% and thus improved short-term stability can be reached at higher light intensities or using schemes for still higher signal contrast [13] Light Shift The AC Stark shift or "light shift" of the clock transition induced by the pump light field constitutes a major source of instabilities in optically pumped atomic clocks [6]. As a consequence, in optically pumped gas-cell clocks the clock transition frequency f C exhibits a dispersive shape as function of the pump light laser frequency L , where the amplitude depends linearly on the total light intensity (see Fig.…”
Section: Clock Resonance Cell Propertiesmentioning
confidence: 99%
“…The narrow and precisely controllable emission spectrum of laser diodes guarantees highly efficient optical pumping, and full separation of different effects that limit the clock performance. Laser optical pumping can therefore offer superior short-term clock stabilities 3•10 -13 -1/2 [3,4], as well as high medium and longterm stabilities [5] equalling or surpassing lamp pumping technology when drifts due to thermal or light shift effects are controlled [6,7]. It thus offers the potential to realize improved high-performance gascell clocks while maintaining the advantageous compact design.…”
Section: Introductionmentioning
confidence: 99%
“…One straightforward strategy for accomplishing this goal, presently being pursued by various laboratories, is to engineer the laser system and supporting electronics so as to very tightly lock the laser frequency to an atomic transition. Though some notable success has been achieved with this strategy [6], it is not necessarily optimal for all applications. First of all, if one wants to operate the device as a highly accurate clock, then long term frequency stability from the device is needed.…”
Section: Introductionmentioning
confidence: 98%