提出一种利用液晶空间光调制器实现二维光场偏振态编码与偏振态选择的方法，其基本思想是通过控制液晶空间光调制器上加载的灰度值改变出射光波的偏振态．对液晶空间光调制器改变光波偏振态的能力进行了研究，利用在空间光调制器不同区域上加载不同灰度对入射光波进行偏振态编码，在输出端实现了以偏振态作为条件进行选择输出．实验结果表明，该方法通过灰度编码能够产生包含两个偏振方向正交的出射光场，并且所组成的偏振选择衍射系统能够实现对衍射光场的偏振态选择．%A method to achieve 2-D polarization-encoding in the light field and polarization-selection based on liquidcrystal spatial light modulator(LCSLM)is proposed. The basic idea is to change the polarization state of output light wave with the gray-level working on LCSLM. The capability of changing the polarization distribution of a light field based on LCSLM is studied in this paper. We encode the polarization state of incident beam with different gray levels working on LCSLM's different areas, so different output informations with different polarization states could be obtained. The experimental results show that the method can generate a light flied obtained two orthogonal polarization directions based on gray-level encoding,and the polarization-selective diffraction system can realize polarization-selection of the diffractive field.
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