A transportable frequency comb for precision measurements with optical clocks outside of laboratories and for precision spectroscopy of ions and molecules

该方案的核心设备是可移动的频率梳。该频率梳将允许在现场进行测量活动，也将提高实验室测量的测量分辨率。该频率梳的主要应用是在现场使用可移动的基于锶的光学原子钟进行测量。时钟的可移植性已经得到证明。为了提高时钟的精度，还采用了一种新的点阵激光器。该项目的目标是在不同的地方精确测量地球引力场的时间膨胀。利用国际空间站上的微波终端，将可移动时钟与在南美洲运行的欧洲时钟进行比较。在另一个项目中，所要求的频率梳将在一个特殊的便携式镱钟的研制过程中用于确定其特征。这个时钟将允许测量来自平流层气球的重力场。 一旦钟的研制完成，频率梳将用于帮助气球上的钟与地面上的钟进行比较。频率梳的其他计划应用包括冷分子氢离子的精密光谱学、超稳定光学谐振器的表征以及掺铕晶体中光谱空穴的研究。

The central device of this proposal in a transportable frequency comb. This frequency comb will allow for measurement campaigns in the field and will also increase the measurement resolution for measurements in the lab.The main application of this frequency comb is measurements with a transportable Strontium based optical atomic clock in the field. The transportability of the clock has already been demonstrated. In order to increase the accuracy of the clock, a new lattice laser is also applied for. The project aims for precision measurements of the time dilation in the gravitational field of the earth at different places. Using the microwave terminal on the international space station, the transportable clock shall be compared with clocks in Europe while it is operated in South America. These measurements aim to improve the quality of geodetic data about this continent.In the course of another project, the requested frequency comb will be used to characterize a special transportable Ytterbium-clock during its development. This clock will allow measurements of the gravitational field from a stratospheric balloon. Once the development of the clock is finished, the frequency comb will serve to aid comparison of the clock in the balloon with the clock on the ground.Other planned applications of the frequency comb are precision spectroscopy on cold molecular hydrogen ions, characterization of ultra-stable optical resonators as well as research on spectral holes in Europium-doped crystals.