GEO600 is a ground-based interferometric gravitational wave detector located near Hannover, Germany. It is designed and operated by scientists from the Max Planck Institute for Gravitational Physics, along with partners in the United Kingdom and is funded by the Max Planck Society and the Science and Technology Facilities Council (STFC). GEO600 is part of a worldwide network of gravitational wave detectors. Two detectors have been constructed in the USA (LIGO), and one each in Italy (Virgo) and Japan (KAGRA). Scientists from GEO600 and LIGO collaborate within the LIGO Scientific Collaboration (LSC). GEO600 scientists together with the Laser Zentrum Hannover (LZH) built the lasers for Advanced LIGO.
Scientists at GEO600 have pushed the available technologies to the limits: laser stabilization, absorption-free optics, control engineering, vibration damping and data acquisition and processing got new impulses. A specialty of GEO600 is the amplification of laser light and signal called "dual recycling": By means of highly reflecting mirrors the laser light is constructively superposed with itself and thus enhanced ("power recycling"); on the other hand by means of an additional mirror the signal is superposed with itself ("signal recycling"). This technique allows a tuning of the detector to a certain frequency. The suspension of the mirror on glass fibers is anther one of the many groundbreaking developments of GEO600. GEO600 is also the first gravitational wave detector that uses squeezed laser light in order to improve sensitivity!
About the team