Compact Velocimeter Based on Large Fizeau’s Light-dragging Effect

为了适应未来大都市无人驾驶移动和GPS独立导航的新时代，需要新型传感器以最小和最健壮的组件的形式满足对位置和速度确定的严格要求。虽然经典的解决方案遇到了硬限制，但原子量子惯性传感器已经提供了比现有解决方案更高的灵敏度和精度，但它们在可访问的带宽上受到限制，并且仍然很大。在这个项目中，我们将开发一种紧凑、坚固的光学测速仪，并在台湾和德国的联合测量活动中演示其工作原理。与基于(超)冷原子的量子惯性传感器不同，其基本概念不是基于需要高度复杂的真空室和额外的激光来冷却原子的低膨胀原子云的产生，而是基于紧凑蒸汽室中的室温热原子，从而极大地简化了实验装置。为了将这些传感器进一步小型化几个数量级，并允许未来以低成本进行工业规模的批量生产，基于晶片的大规模生产是将这些传感器的应用带入日常社会的关键。我们将利用紧凑型气室中基于电磁感应透明(EIT)的大Fizeau光拖动效应，并开发一种实验来演示第一个此类测速仪。特别是，该项目的一个主要目标将是将该装置的灵敏度比台湾PI的第一次基本演示提高3个数量级，同时由于真空兼容集成技术和德国PI在碱蒸气精确光谱方面的专业知识，改善了装置的紧凑性。此外，我们将研究这种类型的速度计的光电集成概念的可能性，作为开发和发展用于导航的新型传感器的基础。

For a new era of driverless mobility and GPS-independent navigation in metropolis of the future, new types of sensors are necessary that can meet stringent requirements for position and velocity determination in the form of the smallest and most robust components. While classic solutions come up against hard limits, atomic quantum inertial sensors already offer sensitivities and accuracies beyond existing solutions, but they are limited in the accessible bandwidths and still bulky.In this project, we will develop a compact, ruggedized optical velocimeter and demonstrate the operating principle in a joint Taiwan-German measurement campaign. In contrast to (ultra-)cold atom based quantum inertial sensors, the underlying concept is not based on the generation of low expansion atomic clouds requiring highly sophisticated vacuum chambers and additional lasers for atom cooling but it is based on room-temperature thermal atoms in a compact vapor cell and therefore dramatically simplifying the experimental setup. In order to further miniaturize these sensors by several orders of magnitude and allow for future manufacturing in industry-scale quantities at low costs, wafer-based mass production is the key for carrying the applications of these sensors into everyday society.We will exploit the large Fizeau’s light-dragging effect based on electromagnetically induced transparency (EIT) in a compact vapor cell and develop an experiment to demonstrate the first velocimeter of its kind. In particular, one main goal of this project will be increasing the sensitivity of this device by 3 orders of magnitude compared to the first fundamental demonstration of the Taiwanese PI , along with improvement of compactness of the setup due to vacuum-compatible integration technologies and expertise in precision spectroscopy of alkali vapors of the German PI. Further, we will study possibilities for photonic-electronic integration concepts for this type of velocimeter as a building block for the development and evolution of novel sensors for navigation.