Paterova Anna, Yang Hongzhi, An Chengwu, Kalashnikov Dmitry, Krivitsky Leonid
Opt Express. 2019 Feb 4;27(3):2589-2603. doi: 10.1364/OE.27.002589.
We study polarization effects in the nonlinear interference of photons generated via frequency nondegenerate spontaneous parametric-down conversion. Signal and idler photons, which are generated in the visible and infrared (IR) range, respectively, are split into different arms of a nonlinear Michelson interferometer, and the interference pattern for signal photons is detected. Due to the effect of induced coherence, the interference pattern for the signal photons depends on the polarization rotation of idler photons, which are introduced by a birefringent sample. Based on this concept, we realize two new methods of measuring sample retardation in the IR range by using well-developed and inexpensive components for visible light. The methods' accuracy reaches specifications that are reported for industrial-grade optical elements. The developed IR polarimetry technique is relevant to material research, optical inspection, and quality control.
我们研究了通过频率非简并自发参量下转换产生的光子的非线性干涉中的偏振效应。分别在可见光和红外（IR）范围内产生的信号光子和闲置光子被分成非线性迈克尔逊干涉仪的不同臂，并检测信号光子的干涉图样。由于诱导相干效应，信号光子的干涉图样取决于由双折射样品引入的闲置光子的偏振旋转。基于这一概念，我们利用成熟且廉价的可见光组件实现了两种测量红外范围内样品延迟的新方法。这些方法的精度达到了工业级光学元件所报告的规格。所开发的红外偏振测量技术与材料研究、光学检测和质量控制相关。
