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液晶空间光调制器能够方便地用于制作各种衍射型光学元件,但液晶空间光调制器存在分辨率有限的缺点,本文提出了用液晶空间光调制器制作相位型光栅,产生一维和二维光阱阵列的新方案,用迭代傅里叶级数算法优化设计光栅的相位分布,在不改变空间光调制器硬件参数设置的情况下,充分利用和发掘了空间光调制器的优点,同时又能较好地回避其所存在的缺陷.根据现有的空间光调制器的技术参数,模拟仿真设计光栅,计算光强分布,结果表明:用大失谐、小功率激光照明,能够产生具有很高峰值光强和光强梯度的光阱阵列,囚禁冷原子的光学偶极势达到mK量级,对原子的作用力远大于原子的重力.
Liquid crystal spatial light modulator can be conveniently used to fabricate various types of diffractive optical elements. However, liquid crystal spatial light modulator has the disadvantage of limited resolution. In this paper, a phase grating with liquid crystal spatial light modulator is proposed to produce one-dimensional and two-dimensional The new scheme of optical trapping array optimizes the phase distribution of the grating by using the iterative Fourier series algorithm. The advantages of the spatial light modulator are fully utilized and excavated without changing the hardware parameter setting of the spatial light modulator, meanwhile Can better avoid its existing defects.According to the technical parameters of the existing spatial light modulator, the simulation design grating, calculate the light intensity distribution, the results show that: with large detuning, low-power laser lighting, can produce a very Optical trap arrays with high peak light intensity and light intensity gradient have the optical dipole potential of impinging cold atoms up to the order of mK, and the forces acting on the atoms are far greater than the gravitational forces of atoms.