论文标题
评估用相随机相干场产生的扭曲的高斯舍尔模型梁
Evaluation of Twisted Gaussian Schell Model beams produced with phase randomized coherent fields
论文作者
论文摘要
扭曲的高斯Schell模型描述了一个部分相干梁的家族，它们具有几个有趣的特征，因此引起了经典和量子光学的关注。最近已经证明了使用一组离散的“伪模型”从相干来源合成这些光束的技术，其中每种模式的相位是随机的，以使它们相互不连贯。在这里，我们研究了这一技术并评估所得的光束参数，例如发散，相干长度和扭曲阶段。我们表明，对于有限的模式，也有一些残差一致性，可以观察到可观察的效果。为包括残留一致性的输出字段开发了一个理论模型，并且与实验数据非常吻合。此外，我们展示了一种使用双缝干扰来测量扭曲相的简单方法。
The twisted Gaussian Schell Model describes a family of partially coherent beams that present several interesting characteristics, and as such have attracted attention in classical and quantum optics. Recent techniques have been demonstrated to synthesize these beams from a coherent source using a discrete set of "pseudo-modes", where the phase of each mode is randomized so that they are mutually incoherent. Here we investigate this technique and evaluate the resulting beam parameters, such as divergence, coherence length and twist phase. We show that for a finite set of modes there is also some residual coherence, which can have an observable effect. A theoretical model is developed for the output field that includes residual coherence and agrees very well with experimental data. In addition, we demonstrate a simple method to measure the twist phase using double slit interference.
