Gravitational waves from binary black hole and neutron star mergers are being regularly
detected. As of 2021, 90 confident gravitational wave detections have been made by the …

Several km-scale gravitational-wave detectors have been constructed worldwide. These
instruments combine a number of advanced technologies to push the limits of precision …

On April 1st, 2019, the Advanced Laser Interferometer Gravitational-Wave Observatory
(aLIGO), joined by the Advanced Virgo detector, began the third observing run, a year-long …

We have performed two-photon ultraviolet direct frequency comb spectroscopy on the 1S-3S
transition in atomic hydrogen to illuminate the so-called proton radius puzzle and to …

Abstract The Gravity Recovery and Climate Experiment (GRACE) has demonstrated that low–
low satellite-to-satellite tracking enables monitoring the time variations of the Earth's gravity …

We present the results of theoretical and experimental studies of dispersively coupled
(or'membrane in the middle') optomechanical systems. We calculate the linear optical …

We present a description of a system for automatic alignment of optical interferometers. The
technique relies on using differential phase modulation to permit the detection of the phase …

The main task of this paper is to identify a number of physical problems that must be
successfully addressed to achieve stabilized laser linewidths well below 1 Hz. After …

The Virgo gravitational wave detector is an interferometer with 3 km long arms in
construction near Pisa to be commissioned in the year 2000. Virgo has been designed to …

For almost 20 years, advanced techniques have been developed and tested at the GEO 600
laser-interferometric gravitational wave detector. Many of these innovations have improved …