Stabilisierte Festkörperlaser hoher Leistung für Gravitationswellenmessungen Habilitationsschrift von Dr. rer. nat. Benno Willke geb. am 25. Februar 1963 in Hildesheim / Deutschland Leibniz Universität Hannover Oktober 2008 Benno Willke Stabilisierte Festkörperlaser hoher Leistung für Gravitationswellenmessungen 2 CONTENTS 1. KURZZUSAMMENFASSUNG (GERMAN) ................................................................................................. 3 2. ABSTRACT (ENGLISH) ............................................................................................................................ 4 3. INTRODUCTION .................................................................................................................................... 4 4. THE CURRENT GENERATION OF GRAVITATIONAL WAVE DETECTORS AND FUTURE UPGRADES .............. 6 5. HIGH POWER LASERS FOR GRAVITATIONAL WAVE DETECTORS ............................................................. 7 6. LASER BEAM CHARACTERIZATION AND STABILIZATION ....................................................................... 10 6.1. THE DIAGNOSTIC BREADBOARD (DBB) ........................................................................................................ 10 6.2. FREQUENCY STABILIZATION AND SPATIAL FILTERING ....................................................................................... 11 6.3. POWER NOISE REDUCTION ..
Stabilisierte Festkörperlaser hoher Leistung für Gravitationswellenmessungen Habilitationsschriftvon Dr. rer. nat. Benno Willke geb. am 25. Februar 1963 in Hildesheim / Deutschland Leibniz Universität Hannover Oktober 2008
Benno Willke
Stabilisierte Festkörperlaser hoher Leistung für Gravitationswellenmessungen 2
CONTENTS 1. KURZZUSAMMENFASSUNG (GERMAN) ................................................................................................. 3 2. ABSTRACT (ENGLISH) ............................................................................................................................ 4 3. INTRODUCTION .................................................................................................................................... 4 4. THE CURRENT GENERATION OF GRAVITATIONAL WAVE DETECTORS AND FUTURE UPGRADES .............. 6 5. HIGH POWER LASERS FOR GRAVITATIONAL WAVE DETECTORS ............................................................. 7 6. LASER BEAM CHARACTERIZATION AND STABILIZATION ....................................................................... 10 6.1. T HE DIAGNOSTIC BREADBOARD (DBB) ........................................................................................................ 10 6.2. F REQUENCY STABILIZATION AND SPATIAL FILTERING ....................................................................................... 11 6.3. P OWER NOISE REDUCTION ........................................................................................................................ 12 7. NOVEL LASER STABILIZATION TECHNIQUES ......................................................................................... 13 7.1. O PTICAL AC COUPLING ............................................................................................................................ 13 7.2. C URRENT LOCK AND QND MEASUREMENTS OF POWER FLUCTUATIONS .............................................................. 15 8. SUMMARY AND OUTLOOK ................................................................................................................. 15 9. REFERENCES ....................................................................................................................................... 16 10. LIST OF ORIGINAL PUBLICATIONS OF B. WILLKE. .................................................................................. 20 11. ACKNOWLEDGEMENTS ....................................................................................................................... 21 12. COPIES OF ORIGINAL PUBLICATIONS OF B. WILLKE .............................................................................. 21