基于三角形衍射光栅的原子冷却囚禁实验研究

Experimental Study on Atomic Cooling Confinement Based on Triangular Diffraction Grating

基于三角形衍射光栅搭建的三维磁光阱实现了87Rb原子的冷却囚禁,自主完成了三角形衍射光栅的设计制备,在保证合理衍射效率及衍射圆偏度的情况下有效抑制了零级光效率,其参数满足光学粘胶平衡条件。基于该光栅搭建了一套磁光阱系统,开展原子囚禁实验。在合理的参数设置下,成功实现了原子囚禁,经测算囚禁原子数量在106量级。基于三角形衍射光栅的原子冷却囚禁实验的成功,对于三维磁光阱的低功耗、小型化具有参考意义,有望应用于小型化冷原子精密测量系统中。

In this paper,a three-dimensional magneto-optical trap based on a triangular diffraction grating is used to realize the cooling and trapping of87Rb atoms. Firstly,the triangle diffraction grating is designed and fabricated independently,which can effectively suppress the zero-order optical efficiency under the condition of ensuring the reasonable diffraction efficiency and diffraction circular deviation,and its parameters meet the optical viscose balance conditions. Then a magnetooptical trap system is built based on the grating to carry out the atom trapping experiment. Under the reasonable parameter setting,the atomic trapping is successfully realized. It is estimated that the number of trapped atoms is in the order of 106.The success of the atom cooling trapping experiment based on the triangular diffraction grating is of great significance for the low power consumption and miniaturization of the three-dimensional magneto-optical trap,and is expected to be applied to the miniaturized precision measurement system of cold atoms.