The first generation of interferometric gravitational wave detectors performed one of the most precise differential length measurements ever. However, to measure the tiny length changes caused by a gravitational wave their sensitivity has to be increased even further. The technical upgrade of the Laser Interferometer Gravitational wave Observatory (LIGO) to a second generation detector, called Advanced LIGO, is currently under way. It will presumably reach a tenfold improved stram sensitivity between 10<sup>-24</sup>Hz<sup>-1/2</sup> and 10<sup>-23</sup>Hz<sup>-1/2</sup>. One of the key technologies necessary to reach this precision is an ultra-stable high-power laser system.
Download Full PDF Version (Non-Commercial Use)