Abstract
The first generation of ingterferometric 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 strain sensitivity between 10−24Hz−1/2 and 10−23Hz−1/2. One of the key technologies necessary to reach this precision is an ultra-stable high-power laser system.
© 2013 IEEE
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