基于矢量光束空间偏振层析的相位精密测量

Precision Phase Estimation Based on Spatial Stokes Tomography of Vector Beams

矢量光场独特的空间模式及偏振分布使其成为目前研究的热点问题,模间相位的变化直接影响矢量光场的偏振分布,使其在测量及传感领域具有巨大的应用潜力。提出并实验论证了一种由矢量光场注入的单频激光干涉仪技术:首先将臂间微小位移映射为矢量传感光场的模间相位变化,然后通过空间偏振层析实时监测、解算光场矢量模态,进而可在任意相位变化区间(含相位不敏感区域)实现标准量子或海森堡(注入N00N态时)极限的相位测量精度。

Vector light gains an increasing interest due to its exotic spatial polarization structure texture,which is governed by the intramodal phase of two orthogonal polarization components,and,in particular,has shown great potential in optical metrology.We present and demonstrate experimentally a novel laser interferometric technique fed by a vector sensing beam.The phase variation of the interferometer is first mapped into the intramodal phase of the sensing beam.Then,by in-situ characterizing the vectorial polarization state of the sensing beam via spatial Stokes tomography,a precision phase estimation approaching standard-quantum or Heisenberg(by feeding a N00N state)limit can be achieved in arbitrary phase ranges including insensitive regions.