Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 55: Poster II
Q 55.35: Poster
Donnerstag, 11. März 2010, 16:00–19:00, Lichthof
Stabilization of the Advanced LIGO 200W laser — •Christina Krämer, Jan Hendrik Pöld, Patrick Kwee, Hyunjoo Kim, Benno Willke, and Karsten Danzmann — Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut) und Institut für Gravitationsphysik der Leibniz Universität Hannover, Germany
The high power laser which will be operated in the interferometric gravitational wave detector Advanced LIGO has to fulfill strict requirements according to frequency and power stability as well as to the shape of the spatial beam profile. Therefore a demanding active and passive stabilization of this continuous wave 200W Nd:YAG laser at 1064nm is necessary. A key part of this stabilization is a ring cavity, which is used to suppress power noise at radio frequencies and improves the spatial beam quality. For the frequency stabilization the laser system is stabilized to a high finesse reference cavity. The power stability is achieved with a nested control loop to reach a relative power noise of 2· 10−9 Hz−1/2 at the interferometer input.
In this contribution the concepts and preliminary results of the stabilization of the Advanced LIGO laser will be presented.