We implement optical pumping to prepare cold atoms in our prototype of the ST Rb space cold atom clock, which operates in the one-way mode. Several modifications are made on our previous physical and optical system. T...We implement optical pumping to prepare cold atoms in our prototype of the ST Rb space cold atom clock, which operates in the one-way mode. Several modifications are made on our previous physical and optical system. The effective atomic signal in the top detection zone is increased to 2.5 times with 87% pumping efficiency. The temperature of the cold atom cloud is increased by 1.4 μK. We study the dependences of the effective signal gain and pumping efficiency on the pumping laser intensity and detuning. The effects of σ transition are discussed. This technique may be used in the future space cold atom clocks.展开更多
一条宽带的使用,频率塑造了翻译联盟者寒冷铯分子上的第二激光最近表明了是也使自由的震动的度凉下来的一个很有效的方法的飞米。冷分子的一件样品,开始散布了超过几个震动的层次,因此被变成了汗衫 X <SUP>1</SUP>&#...一条宽带的使用,频率塑造了翻译联盟者寒冷铯分子上的第二激光最近表明了是也使自由的震动的度凉下来的一个很有效的方法的飞米。冷分子的一件样品,开始散布了超过几个震动的层次,因此被变成了汗衫 X <SUP>1</SUP>Σ<SUB 的单个选择震动的水平 > g </SUB> 扎根了电子状态。我们的方法基于使所有激动的与足够宽广的一个系列的由激光光的重复的光抽占据了震动的层次,但是与一个空间轻调节的人在它的频率带宽限制了。以如此的一个方法,我们能从选择水平,分子在积累消除转变。在这篇论文,我们简短报导主要试验性的结果然后地址,以由计算机模拟的一个详细方法,观点为一“完成”分子冷却,也包括自由的旋转的度。因为抽的过程强烈取决于地面的相对形状,激动的潜力弯,通过不同激动的状态的 ro 震动的冷却理论上被比较。展开更多
基金Supported by the Fund from the Ministry of Science and Technology of China under Grant No 2013YQ09094304the Youth Innovation Promotion Association of Chinese Academy of Sciences
文摘We implement optical pumping to prepare cold atoms in our prototype of the ST Rb space cold atom clock, which operates in the one-way mode. Several modifications are made on our previous physical and optical system. The effective atomic signal in the top detection zone is increased to 2.5 times with 87% pumping efficiency. The temperature of the cold atom cloud is increased by 1.4 μK. We study the dependences of the effective signal gain and pumping efficiency on the pumping laser intensity and detuning. The effects of σ transition are discussed. This technique may be used in the future space cold atom clocks.
文摘一条宽带的使用,频率塑造了翻译联盟者寒冷铯分子上的第二激光最近表明了是也使自由的震动的度凉下来的一个很有效的方法的飞米。冷分子的一件样品,开始散布了超过几个震动的层次,因此被变成了汗衫 X <SUP>1</SUP>Σ<SUB 的单个选择震动的水平 > g </SUB> 扎根了电子状态。我们的方法基于使所有激动的与足够宽广的一个系列的由激光光的重复的光抽占据了震动的层次,但是与一个空间轻调节的人在它的频率带宽限制了。以如此的一个方法,我们能从选择水平,分子在积累消除转变。在这篇论文,我们简短报导主要试验性的结果然后地址,以由计算机模拟的一个详细方法,观点为一“完成”分子冷却,也包括自由的旋转的度。因为抽的过程强烈取决于地面的相对形状,激动的潜力弯,通过不同激动的状态的 ro 震动的冷却理论上被比较。