Large scale interferometric gravitational wave detectors
Mitigating Noise in Interferometric Gravitational Wave Detectors
... the large bandwidth and detuning limit, the power fluctuations in the output field originate from the same quadrature that is responsible for the radiation pressure ...
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Homodyne detection for laser-interferometric gravitational wave detectors
... very large change in reflected phase for a small change of detuning (mismatch between the cavity length and laser frequency); the RF sidebands, on the other hand, are typically far from resonance and experience ...
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Quantum correlation measurements in interferometric gravitational wave detectors
... the interferometric gravitational wave detectors, such as the Advanced Laser Interferometer Gravitational wave Observatory (LIGO), is limited by quantum shot noise, quantum ...
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Mirror thermal noise in interferometric gravitational wave detectors
... for gravitational radiation? Often hailed as a “new window on the universe,” gravitational waves promise to tell us about massive compact objects in the universe that we might not find by conven- tional ...
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A 'Violin-Mode' shadow sensor for interferometric gravitational wave detectors
... by a system of sensors and actuators, intended to compensate for drifts in, and excitations of, the suspension [6]. The lateral eigenmodes, or ‘Violin-Modes,’ of the vertically orientated silica suspension fibres are ...
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Enhancing the sensitivity of future laser-interferometric gravitational wave detectors
... 4.1.2 Sensitivity of a speed meter Since the early 1990s it has been known that the measurement of momentum, known to be a quantum non-demolition (QND) observable, offers the ability to surpass the SQL in ...
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Squeezed light sources for current and future interferometric gravitational-wave detectors
... 5.3.1 Bowtie cavity motivation and effect of backscattered light A squeezed light source for the purpose of gravitational-wave detection must produce squeezing in the audio frequency band. This presents a ...
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Results of the first coincident observations by two laser-interferometric gravitational wave detectors
... genuine gravitational waves, they ought to have shown the same intrinsic strain amplitude in both detectors, apart from the effects of detector ...real gravitational wave events of this ...
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Brownian Thermal Noise in Interferometric Gravitational Wave Detectors and Single Photon Optomechanics
... detect gravitational waves started in the 1960s when Joseph Weber con- structed resonant bars and attempted to read out the excitations of the bars by gravitational-wave bursts ...kilometer ...
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Advanced technologies for future ground-based, laser-interferometric gravitational wave detectors
... coatings [93]. These dopants at the level of 25% have been shown to lower the mechanical loss by approximately 40%. There has also been significant progress in understanding the link be[r] ...
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When light gets pushy: radiation pressure effects in interferometric gravitational wave detectors
... of detectors, would be based on dual-recycled Michelson interferometers with Fabry-Perot arm cavities, however the observatory would be formed from 3 identical, nested detectors forming an equilateral ...
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Noise Cancellation for Gravitational Wave Detectors
... higher wave numbers compared to the freely propagating surface waves, so that the density of the seismic array would need to be increased to a point where it becomes very challenging to monitor the entire field ...
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An investigation of eddy-current damping of multi-stage pendulum suspensions for use in interferometric gravitational wave detectors
... Eddy-current damping has been considered for use in other interferometric gravitational wave detectors. The VIRGO ( French-Italian ) group have previously investigated the possible adverse ...
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A source of illumination for low-noise 'Violin-Mode' shadow sensors, intended for use in interferometric gravitational wave detectors
... shadow-displacement detectors of this work were constrained to being located at some stand-off distance from the fibres whose VM vibrations were to be monitored—at an optical path-length (via a right-angled ...
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Quantum limited measurements in gravitational wave detectors
... For Gravitational Wave Detection This chapter outlines a proposal for a modified speed-meter interferometer that beats the standard quantum limit over a broad frequency ...kilometre scale ‘sloshing ...
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Improving the Performance and Sensitivity of Gravitational Wave Detectors
... One of the main limitations on longer lock stretches is the lack of interferometric align- ment sensing. As discussed above, the final alignment state of the interferometer includes feedback loops acting on ...
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Future Networks of Gravitational Wave Detectors: Quantum Noise and Space Detectors
... of interferometric gravitational wave detectors, we measure the light coming out of the interferometer to see if there is a signal present or not, but there is nothing special to the light ...
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Exploring the sensitivity of next generation gravitational wave detectors
... There are several areas of R&D which will determine the quantum noise in future detectors. First among these is work into increasing the measured squeezing levels [45– 54]. Second is prototyping of the ...
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Length Sensing and Control of a Prototype Advanced Interferometric Gravitational Wave Detector
... out. These measurements revealed the difficulty of accurately predicting these noise couplings, and will inform the choices of interferometer topology, readout technique, and most importantly, control scheme for future ...
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Searching for Stochastic Gravitational Waves Using Co-located Interferometric Detectors. Nickolas Fotopoulos
... ometer Gravitational Wave Observatory) Hanford interferometers have not been used in the search for the stochastic gravitational wave background due to their coupling to a shared environment, ...
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