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

对于未来大都会无人驾驶和GPS独立导航的新时代，需要新型传感器，以最小和最坚固的组件形式满足位置和速度确定的严格要求。虽然传统的解决方案遇到了硬限制，原子量子惯性传感器已经提供了超越现有解决方案的灵敏度和精度，但它们在可访问的带宽方面受到限制，并且仍然体积庞大。在这个项目中，我们将开发一种紧凑，坚固的光学速度计，并在台德联合测量活动中展示其工作原理。与基于（超）冷原子的量子惯性传感器相比，其基本概念不是基于需要高度复杂的真空室和用于原子冷却的附加激光器的低膨胀原子云的生成，而是基于紧凑的蒸气室中的室温热原子，因此大大简化了实验设置。为了将这些传感器进一步放大几个数量级，并允许未来以低成本进行工业规模的制造，基于晶圆的大规模生产是将这些传感器应用于日常社会的关键。我们将利用基于电磁感应透明（EIT）的大型斐索光拖曳效应在一个紧凑的蒸汽室，并开发一个实验，以证明其同类的第一个速度计。特别是，该项目的一个主要目标是将该设备的灵敏度与台湾PI的第一次基本演示相比提高3个数量级，沿着由于真空兼容集成技术和德国PI在碱蒸汽精确光谱方面的专业知识而提高了设置的紧凑性。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，作为开发和发展新型传感器导航的基石。

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.