Hannover 2003 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
Q: Quantenoptik
Q 22: Festkörperlaser 3
Q 22.8: Vortrag
Dienstag, 25. März 2003, 15:45–16:00, E001
Laser development for the spaceborne gravitational wave detector LISA — •Michael Tröbs1, Carsten Fallnich1, Markus Bode2, Ingo Freitag2, Gerhard Heinzel3, and Karsten Danzmann3 — 1Laser Zentrum Hannover e. V. Hollerithallee 8, D-30419 Hannover — 2Innolight GmbH, Garbsener Landstr. 10, D-30419 Hannover — 3Max-Planck-Institut für Gravitationsphysik, Callinstr. 38, D-30167 Hannover
The Laser Interferometer Space Antenna (LISA) is a giant Michelson interferometer with 5 million kilometer long arms. LISA will detect gravitational waves in the millihertz frequency band. It requires frequency and intensity stabilized lasers with at least 700 mW of output power.
We present the first laser demonstrator for LISA - a fiber-coupled Nd:YAG laser system based on a diode-pumped monolithic nonplanar ring oscillator. The laser emits more than 1 W of optical power and is actively frequency stabilized to a high finesse cavity using the Pound-Drever-Hall scheme. We have measured frequency noise of less than 300 Hz/√(Hz) at 1 mHz which is currently limited by the frequency stability of the reference system. The relative intensity stability is below 4× 10−3/√(Hz) at 1 mHz and 6× 10−7/√(Hz) at 1 Hz.