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Squeezed light for gravitational wave astronomy [Elektronische Ressource] / von Henning Vahlbruch


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Squeezed Light for Gravitational Wave AstronomyVon der Fakultät für Mathematik und Physikder Gottfried Wilhelm Leibniz Universität Hannoverzur Erlangung des GradesDoktor der Naturwissenschaften– Dr. rer. nat. –genehmigte DissertationvonDipl.-Phys. Henning Vahlbruchgeboren am 29. Juli 1976 in Frankfurt am Main2008Referent: Prof. Dr. Roman SchnabelKorreferent: Prof. Dr. Karsten DanzmannTag der Promotion: 28.11.2008AbstractDuring the recent years an international network of interferometric gravitational wave(GW) detectors has been commissioned and searches for various classes of GW-signals are ongoing. Although the observatories are beginning to reach astrophysicallyinteresting sensitivity levels, extensive upgrades are aimed for the next decade bringingus into the era of gravitational wave astronomy. One approach to enhance the detectorsensitivity is the injection of squeezed vacuum states of light replacing the vacuumfluctuations entering the detector through its antisymmetric port.In this thesis the unprecedented generation of squeezed vacuum states with anoise power 6.5 dB below vacuum noise within the entire detection bandwidth ofground-based GW-detectors (10 Hz - 10 kHz) was experimentally demonstrated at awavelength of 1064 nm. For the first time a coherent control scheme was employedfor comprehensive phase control of the experimental setup. This scheme is directlyapplicable to future GW-detector topologies.



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Published 01 January 2008
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Language English
Document size 17 MB