Beschreibung:
While laser frequency combs (LFCs) are in principle ideal calibration light sources for high resolution spectrographs, they are still not regularly used. This is not only due to high cost and maintenance, but also persistent technological challenges. One of these challenges is the high variability and instability of the spectral envelope of the LFC. This issue is caused by underlying physical effects and the sensitivity of the nonlinear broadening process used to generate the supercontinuum spectrum. In the context of ELT-HIRES and the Göttingen solar observatory, we aim to improve the cali...