State-insensitive dichromatic optical-dipole trap for rubidium atoms: calculation and the dicromatic laser's realization
State-insensitive dichromatic optical-dipole trap for rubidium atoms: calculation and the dicromatic laser's realization
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DOI：
10.1088/0953-4075/47/9/095001
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发表时间：
2014-05
期刊：
影响因子：
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通讯作者：
Junmin Wang;Shanlong Guo;Yulong Ge;Yongjie Cheng;Baodong Yang;Jun He
中科院分区：
文献类型：
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作者：
Junmin Wang;Shanlong Guo;Yulong Ge;Yongjie Cheng;Baodong Yang;Jun He
魔波长光偶极阱（ODT）可以实现对中性原子的囚禁，并消除原子跃迁中的位置依赖的空间非均匀微分光移。通过使用双色（λ1 + λ2（此处λ2 = 2λ1 <$1.5 μm））线偏振ODT激光器，可以方便地将87 Rb 5 P3/2态的光移调整为等于87 Rb 5S 1/2态的光移。在我们的计算中，得到了87 Rb 5S 1/2（F = 2）-5 P3/2（F′ = 3）跃迁的两组态不敏感的二色性谱（784.3 + 1568.6nm和806.4 + 1612.8nm）.此外，通过将PPMgO：LN晶体与光纤放大的1.5 μm通信激光器相结合，实现了784.3 + 1568.6 nm中等输出功率的双色激光系统。
Magic wavelength optical-dipole trap (ODT) allows confinement of neutral atoms and cancellation of the position-dependent spatially inhomogeneous differential light shift for a desired atomic transition. The light shift of the 87Rb 5P3/2 state can be expediently tailored to be equal to that of the 87Rb 5S1/2 state by employing dicromatic (λ1 + λ2 (here λ2 = 2λ1 ∼ 1.5 µm)) linearly polarized ODT lasers. In our calculation, two sets of state-insensitive dichromatic (784.3 + 1568.6 nm and 806.4 + 1612.8 nm) are obtained for the 87Rb 5S1/2 (F = 2) – 5P3/2 (F′ = 3) transition. Further, 784.3 + 1568.6 nm dicromatic laser system with a moderate output power has been realized experimentally by marrying efficient second-harmonic generation using a PPMgO:LN bulk crystal with a fibre-amplified 1.5 µm telecom laser.