We describe a single mode LNA ring laser, which emits 60 mW at $1.083~mu$m. Thanks to a high frequency F.M. saturated absorption technique, this laser is directly locked to an atomic line in a 4He discharge cell. The residual frequency jitter is 130 kHz. We then present two examples of laser manipulation of helium 4 atoms in the 2 3S1 metastable state, using this laser : a density increase of the atomic beam by a factor of 8, with one-dimensional optical molasses, and a selective deflection of the metastable helium beam using a laser beam with curved wavefronts.
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机译：我们描述了一个单模LNA环形激光器，其散发60兆瓦以上$ 1.083〜 mu $ m。谢谢你的高频率。饱和吸收技术，该激光直接锁定在4HE放电电池中的原子线。剩余频率抖动是130 kHz。然后，我们使用该激光器在2 3S1亚稳态状态下呈现激光4原子的激光操作的两个例子：原子束的密度增加为8倍，具有一维光学糖蜜，以及亚稳态的选择性偏转使用激光束的氦束，其中弯曲波前。
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