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We report recent improvement in absolute frequency measurement of the 115In+5s21S0-5s5p 3P0 clock transition at 236.5 nm. Using a narrowline laser as a local oscillator, a linewidth of 43 Hz for the transition is resolved. The uncertainty of the transition frequency's centroid is 18 Hz, leading to a fractional uncertainty of 1.4 x 10-14. In the experiment, a single 115In+is trapped in a three-ring...
We measure the frequency of the 5s 21 S 0 –5s5p 3 P 0 narrowline clock transition at 236.5nm, for a single, trapped and laser cooled 115 In + ion. In the experiment, an ultra-narrow linewidth laser (<1.34Hz at 3s integration time) is used to interrogate the clock transition for high resolution spectroscopy. A linewidth of 43Hz of the clock transition...
We report an improved absolute frequency measurement of the 5s21S0 -5s5p 3P0 narrowline clock transition at 236.5 nm, for a single trapped and laser cooled 115In+. Using a narrowline laser as the local oscillator, a linewidth of 43 Hz for the transition is resolved. For absolute frequency measurement we use an optical frequency comb referenced to a cesium clock The transition frequency is found to...
We report on the current status of the optical frequency standard based on a single 115In+ ion. A single indium ion is being trapped in a Paul-Strauble type trap and cooled in combination of Doppler cooling and sideband cooling to its lowest vibrational states. To interrogate the 1S0-3P0 clock transition with high accuracy we demonstrate a Hz-level laser system resonant to this transition. With the...
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