论文标题
原子干涉rb蓝色过渡
Atom Interferometry with the Rb Blue Transitions
论文作者
论文摘要
我们根据$ 5 \ Mathrm {s} -6 \ Mathrm {p} $蓝色过渡$^{87} $ rb的$ 5 \ Mathrm {s} -6 \ Mathrm {s} -6 \ Mathrm {s} $ rb的$ 5 \ 6 \ Mathrm {s} -6 \ 6 \ 6 \ rb，该$^{87} $ rb的增加提供了一个因子$ \ sim 2 $与常见的惯例相关的sim 2 $相互交易，该新颖的方案是$^{87} $ rb的$^{87} $ rb的增加。为此，开发了420-422 nm范围内产生超过1 W光的狭窄线宽激光系统。我们的拉曼干涉仪用作冷原子的重力渐变仪，可以在1 s和$ 2 \ times 10^{ - 10} $ g $ $ 1 \ times10^{ - 8} $ g $ $ 1 \ times 10^{ - 10} $ g $后稳定。当在一阶Bragg转换上操作时，干涉仪显示出1 s的稳定性为$ 6 \ times10^{ - 8} $ g，平均为$ 1 \ times10^{ - 9} $ g在2000 s集成时间之后。目前，由于自发发射引起的噪声而限制了仪器灵敏度，可以通过增加激光功率和因原子共振而引起的脉动进一步提高。目前的方案对高精度实验具有吸引力，特别是对于确定牛顿引力常数的测定。
We demonstrate a novel scheme for Raman-pulse and Bragg-pulse atom interferometry based on the $5\mathrm{S} - 6\mathrm{P}$ blue transitions of $^{87}$Rb that provides an increase by a factor $\sim 2$ of the interferometer phase due to accelerations with respect to the commonly used infrared transition at 780 nm. A narrow-linewidth laser system generating more than 1 W of light in the 420-422 nm range was developed for this purpose. Used as a cold-atom gravity gradiometer, our Raman interferometer attains a stability to differential acceleration measurements of $1\times10^{-8}$ $g$ at 1 s and $2\times 10^{-10}$ $g$ after 2000 s of integration time. When operated on first-order Bragg transitions, the interferometer shows a stability of $6\times10^{-8}$ g at 1 s, averaging to $1\times10^{-9}$ g after 2000 s of integration time. The instrument sensitivity, currently limited by the noise due to spontaneous emission, can be further improved by increasing the laser power and the detuning from the atomic resonance. The present scheme is attractive for high-precision experiments as, in particular, for the determination of the Newtonian gravitational constant.
