Quantum Enhancement of a 4 km Laser Interferometer Gravitational-Wave Detector by Sheon S. Y. ChuaQuantum Enhancement of a 4 km Laser Interferometer Gravitational-Wave Detector by Sheon S. Y. Chua

Quantum Enhancement of a 4 km Laser Interferometer Gravitational-Wave Detector

bySheon S. Y. Chua

Hardcover | May 21, 2015

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The work in this thesis was a part of the experiment of squeezed light injection into the LIGO interferometer. The work first discusses the detailed design of the squeezed light source which would be used for the experiment. The specific design is the doubly-resonant, traveling-wave bow-tie cavity squeezed light source with a new modified coherent sideband locking technique. The thesis describes the properties affecting the squeezing magnitudes and offers solutions which improve the gain. The first part also includes the detailed modeling of the back-scattering noise of a traveling Optical Parametric Oscillator (OPO). In the second part, the thesis discusses the LIGO Squeezed Light Injection Experiment, undertaken to test squeezed light injection into a 4km interferometric gravitational wave detector. The results show the first ever measurement of squeezing enhancement in a full-scale suspended gravitational wave interferometer with Fabry-Perot arms. Further, it showed that the presence of a squeezed-light source added no additional noise in the low frequency band. The result was the best sensitivity achieved by any gravitational wave detector. The thesis is very well organized with the adequate theoretical background including basics of Quantum Optics, Quantum noise pertaining to gravitational wave detectors in various configurations, along with extensive referencing necessary for the experimental set-up. For any non-experimental scientist, this introduction is a very useful and enjoyable reading. The author is the winner of the 2013 GWIC Theses Prize.
Sheon S. Y. Chua received his PhD in Physics from The Australian National University in 2013. He won the 2013 GWIC Thesis Prize - The annual prize for an outstanding Ph.D. thesis based on research in gravitational waves, awarded by the Gravitational Wave International Committee (GWIC). He is currently holding the position of a Postdoct...
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Title:Quantum Enhancement of a 4 km Laser Interferometer Gravitational-Wave DetectorFormat:HardcoverDimensions:220 pagesPublished:May 21, 2015Publisher:Springer-Verlag/Sci-Tech/TradeLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:3319176854

ISBN - 13:9783319176857

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Table of Contents

Preface.- Acknowledgements.- Introduction.- Gravitational Waves and the Quest for their Direct Detection.- Quantum Optics and Light.- Quantum Noise in Gravitational -Wave Detectors and Applied Squeezed States.- Squeezed State Generation for Gravitational-wave Detection.- The Doubly Resonant, Travelling- Wave Squeezed Light Source.- Backscatter Tolerance of a travelling-wave Optical Parametric Oscillator.- Overview of the LIGO Squeezed Light Injection Experiment.- Squeezing-enhancement of a 4km LIGO gravitational-wave detector.- Backscattered-light Impact in a Squeezing-enhanced Gravitational-Wave Detector.- Results Summary, Recommendations and Future Work.- Quantum noise and squeezing in Dual-recycled Michelson Interferometers.- Initial analysis and repair of the Enhanced LIGO H1 Output Mode Cleaner.- Supplementary Information for the Backscatter-light Experiments at LIGO.