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Cavity enhanced spectroscopy on ultra-narrow transitions in atoms and molecules is a promising tool for frequency stabilization of clock lasers. However, the small beam waist of a typical cavity can effectively reduce the number of atoms in the system or introduce transit time broadening in the less controlled molecular systems. We present a cavity design with an internal telescope optimized to increase...
The development of simple and reliable high stability clock lasers is of great importance for future state-of-the-art optical clocks [1]–[5] and for future transportable optical clocks [6], [7]. Further development of clock lasers with better stability has so far been hindered by thermal noise in the reference cavity used for laser stabilization and conventional approaches for improvements may be...
The stability of current state-of-the-art optical atomic clocks [1]-[5] is mostly limited by the frequency noise of the interrogation oscillator through the Dick effect. To achieve the heralded ultimate stability, future optical frequency standards will need to produce light sources with frequency stability at the 10−17 fractional level or below at one second of integration time. Recently, a new frontier...
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