München 2019 – wissenschaftliches Programm
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GR: Fachverband Gravitation und Relativitätstheorie
GR 12: Gravitational Waves
GR 12.4: Vortrag
Donnerstag, 21. März 2019, 15:15–15:30, HS 4
Laser Amplification and Coherent Beam Combination for Gravitational Wave Detectors — •Nina Bode1,2 and Benno Willke1,2 — 1Max-Planck-Institut für Gravitationsphysik, Hannover, Deutschland — 2Albert-Einstein Institut der Leibniz Universität Hannover, Deutschland
The sensitivity of gravitational wave detectors scales with the laser power. To reduce shot noise it is nescessary to have a high power, scalable and stable laser system.
Here we present two options for such systems. Both are based on solid state high power amplifiers seeded with NPRO lasers at a wavelength of 1064nm.
In the first system the laser power from two separetly seeded amplifiers is coherently combined on a variable beam splitter. The second one comprises two amplifiers in sequence. Compared to actual laser systems these techniques achieve a better noise behaviour and a higher reliability with similar output power.
We show the promising results of the characterization of both systems.