Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie
Q 57.96: Poster
Donnerstag, 17. März 2011, 16:30–19:30, P1
Stabilization of the Advanced LIGO laser — •Christina Bogan, Jan-Hendrik Pöld, Patrick Kwee, Benno Willke, and Karsten Danzmann — Albert-Einstein-Institut Hannover
Most high precision measurements require a very stable and robust light source. The gravitational wave detector Advanced LIGO has very strict requirements according to the frequency and power stability as well as to the spatial beam profile of the injected continuous wave 200W Nd:YAG laser. Therefore a combined active and passive stabilization scheme is essential. In order to achieve a TEM00 mode content of more than 98.8% a bow-tie shaped cavity is used as a modecleaner which also supresses beam pointing and power noise at radio frequencies. The laser frequency is stabilized to a high finesse reference cavity. A nested control loop prestabilizes the laser system’s power to a relative power noise of 2*10−8(Hz)−1/2 and provides an additional input to achieve a relative power noise of 2*10−9(Hz)−1/2 at the interferometer input.
The concepts and results of the stabilization of the Advanced LIGO laser are presented.