Chille Vanessa, Berg-Johansen Stefan, Semmler Marion, Banzer Peter, Aiello Andrea, Leuchs Gerd, Marquardt Christoph
Opt Express. 2016 May 30;24(11):12385-94. doi: 10.1364/OE.24.012385.
We present an experimental method for the generation of amplitude squeezed high-order vector beams. The light is modified twice by a spatial light modulator such that the vector beam is created by means of a collinear interferometric technique. A major advantage of this approach is that it avoids systematic losses, which are detrimental as they cause decoherence in continuous-variable quantum systems. The utilisation of a spatial light modulator (SLM) gives the flexibility to switch between arbitrary mode orders. The conversion efficiency with our setup is only limited by the efficiency of the SLM. We show the experimental generation of Laguerre-Gauss (LG) modes with radial indices 0 or 1 and azimuthal indices up to 3 with complex polarization structures and a quantum noise reduction up to -0.9dB±0.1dB. The corresponding polarization structures are studied in detail by measuring the spatial distribution of the Stokes parameters.
我们提出了一种产生振幅压缩高阶矢量光束的实验方法。光通过空间光调制器进行两次调制，使得矢量光束通过共线干涉技术产生。这种方法的一个主要优点是它避免了系统损耗，而系统损耗是有害的，因为它们会在连续变量量子系统中导致退相干。使用空间光调制器（SLM）提供了在任意模式阶次之间切换的灵活性。我们装置的转换效率仅受SLM效率的限制。我们展示了径向指数为0或1且方位指数高达3的具有复杂偏振结构的拉盖尔 - 高斯（LG）模式的实验产生，以及高达 -0.9dB±0.1dB的量子噪声降低。通过测量斯托克斯参数的空间分布详细研究了相应的偏振结构。
