Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 28: Precision Measurements and Metrology (Gravity)
Q 28.2: Talk
Wednesday, March 11, 2020, 11:15–11:30, f435
Gravitational Influence on Earth-based Laser Cavity Experiments — •Sebastian Ulbricht1,2, Johannes Dickmann1,2, Robert A. Müller1,2, Stefanie Kroker1,2, and Andrey Surzhykov1,2 — 1Physikalisch-Technische Bundesanstalt, Germany — 2Technische Unversität Braunschweig, Germany
Modern laser cavities with highly reflective mirrors are essential to the nowadays most accurate measurement devices, e.g. optical clocks, high resolution spectroscopy lasers and gravitational wave detectors. Due to the increasing demand for precision in these experiments, the stability of laser cavities underwent a tremendous improvement during the last decades. However, they are not operated in an isolated environment, but in the gravitational field of the Earth. Therefore, in this contribution, we consider the influence of Earth’s gravity on laser stabilization cavities. We theoretically investigate the dynamics of electromagnetic waves in Rindler spacetime and give an analytical expression for Gaussian beams, propagating in a homogeneous gravitational field. This result is then used to obtain the output signal of a Fabry-Pérot cavity on Earth. According to our results, gravity causes changes in the intensity profile at the cavity output. Possible scenarios to measure this effect are discussed for three existing cavity settings.