Anica went into mass production mode: while the previous paper has been published with Optics Letters, the next one is already on the arXiv. Both papers study frequency conversion in gas-filled hollow-core fibers in different regimes. Congratulations to Anica! 

With the help of Andreas Brotzer from LMU, we installed a state-of-the-art broadband seismometer in our basement. Side-by-side with our own narrowband seismometer, our tiltmeter, and the large ring laser, we embarked on a three-week measurement campaign during the Christmas break. Indeed, we were able to record a number of teleseismic events (= earthquakes on the other side of the globe) with magnitudes between M6.5 and M7. Thanks a lot to Andreas and the entire team at the Geodetic Observatory in Fürstenfeld-Bruck, as well as to Heiner Igel's group at LMU, for loan of the equipment and for support in data analysis. 

Happy New Year to all of you, hoping for a peaceful and successful year 2025! We are welcoming two new additions to the team: Thomas Gereons started his master internship with us, and Tessa Koch dived into her Bachelor's thesis: good luck to the two of you!

Ring lasers are interferometers that require length stability at a fraction of the wavelength: not a mean feat for heterolithic structures of more than 10 meter length, especially when operated in a wobbling University building with sizeable temperature fluctuations. In a new preprint, Jannik Zenner presents two methods to stabilize the length of the 14-meter ring cavity to within a few nanometers. Congratulations to Jannik and the team!