Precise shaping of laser light by an acousto-optic deflector.
Precise shaping of laser light by an acousto-optic deflector.
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DOI：
10.1364/oe.21.024837
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发表时间：
2013-07
期刊：
影响因子：
3.8
通讯作者：
D. Trypogeorgos;T. Harte;A. Bonnin;C. Foot
中科院分区：
文献类型：
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作者：
D. Trypogeorgos;T. Harte;A. Bonnin;C. Foot
提出了一种利用声光偏转实现激光束整形的方法，并讨论了它在超冷原子偶极囚禁中的应用。通过驱动多个频率的声光偏转器，我们产生了一个重叠的衍射限制光束的联合收割机，形成一个任意形状的光滑和连续的陷阱势阵列。将原子限制在由在其中心区域具有均匀强度的激光束形成的平底势中，与高斯束偶极阱和许多其他捕获方案固有的谐波限制相比，具有许多优点。我们证明了这种光束整形方法的多功能性，通过产生具有大平顶区域的电位以及补偿残余外部电位的强度图案，以创建一个均匀的背景，可以添加实验感兴趣的捕获电位。
We present a laser beam shaping method using acousto-optic deflection of light and discuss its application to dipole trapping of ultracold atoms. By driving the acousto-optic deflector with multiple frequencies, we generate an array of overlapping diffraction-limited beams that combine to form an arbitrary-shaped smooth and continuous trapping potential. Confinement of atoms in a flat-bottomed potential formed by a laser beam with uniform intensity over its central region confers numerous advantages over the harmonic confinement intrinsic to Gaussian beam dipole traps and many other trapping schemes. We demonstrate the versatility of this beam shaping method by generating potentials with large flat-topped regions as well as intensity patterns that compensate for residual external potentials to create a uniform background to which the trapping potential of experimental interest can be added.