中国激光, 1994, 21 (3): 178, 网络出版: 2007-08-17
利用空间多普勒调谐技术冷却原子及其速度单一化
Theory and New Method of Laser Cooling of Atoms by Spatial Doppler Tuning and Effects of Monochromatic Velocity
摘要
本文理论计算了用圆锥管内多次全反射激光而产生的多普勒频移来冷却原子束的机制。给出了最佳冷却原子束的圆锥管的夹角、长度、反射次数及激光入、出射角等参数。理论计算了原子束经过圆锥管冷却的速度分布情况。数值计算结果表明:采用两个长130 cm的锥形管来冷却原子束,选用合适的失谐量可使极大部分速度小于1200 m/s的原子冷却到8 lm/s,并且可得到单一速度的高亮度的原子束。
Abstract
A new method to cool atoms is proposed and discussed in theory. The parameters on this method are also given.The atomic beams slowed by repeatedly crossing a resonant laser beam at a conical angle. The results show that not only almsost all the atoms below 1200 m/s are cooled to 81 m/s, but also a high density monochromatic velocity atomic beam can be obtained.
参考文献
陈洪新, 束伟, 王育竹. 利用空间多普勒调谐技术冷却原子及其速度单一化[J]. 中国激光, 1994, 21(3): 178. 陈洪新, 束伟, 王育竹. Theory and New Method of Laser Cooling of Atoms by Spatial Doppler Tuning and Effects of Monochromatic Velocity[J]. Chinese Journal of Lasers, 1994, 21(3): 178.
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