Publications (14)
Squeezed-field injection for gravitational wave interferometers
Henning Vahlbruch, Simon Chelkowski, Boris Hage +3
In a recent table-top experiment we demonstrated the compatibility of three advanced interferometer techniques for gravitational wave detection, namely power-recycling, detuned sig…
Coherent control of broadband vacuum squeezing
Simon Chelkowski, Henning Vahlbruch, Karsten Danzmann +1
We present the observation of optical fields carrying squeezed vacuum states at sideband frequencies from 10Hz to above 35MHz. The field was generated with type-I optical parametri…
Experimental demonstration of a Displacement noise Free Interferometry scheme for gravitational wave detectors showing displacement noise reduction at low frequencies
Antonio Perreca, Simon Chelkowski, Stefan Hild +1
This paper reports an experimental demonstration of partial displacement noise free laser interferometry in the gravitational wave detection band. The used detuned Fabry-Perot cavi…
Prospects of higher-order Laguerre Gauss modes in future gravitational wave detectors
Simon Chelkowski, Stefan Hild, Andreas Freise
The application of higher-order Laguerre Gauss (LG) modes in large-scale gravitational wave detectors has recently been proposed. In comparison to the fundamental mode, some higher…
Pushing towards the ET sensitivity using 'conventional' technology
Stefan Hild, Simon Chelkowski, Andreas Freise
Recently, the design study `Einstein gravitational wave Telescope' (ET) has been funded within the European FP7 framework. The ambitious goal of this project is to provide a concep…
Observation of squeezed light with 10dB quantum noise reduction
Henning Vahlbruch, Moritz Mehmet, Nico Lastzka +6
Squeezing of light's quantum noise requires temporal rearranging of photons. This again corresponds to creation of quantum correlations between individual photons. Squeezed light i…
A Xylophone Configuration for a third Generation Gravitational Wave Detector
Stefan Hild, Simon Chelkowski, Andreas Freise +4
Achieving the demanding sensitivity and bandwidth, envisaged for third generation gravitational wave (GW) observatories, is extremely challenging with a single broadband interferom…
Squeezed-input, optical-spring, signal-recycled gravitational-wave detectors
Jan Harms, Yanbei Chen, Simon Chelkowski +4
We theoretically analyze the quantum noise of signal-recycled laser interferometric gravitational-wave detectors with additional input and output optics, namely frequency-dependent…
Demonstration of a squeezed light enhanced power- and signal-recycled Michelson interferometer
Henning Vahlbruch, Simon Chelkowski, Boris Hage +3
We report on the experimental combination of three advanced interferometer techniques for gravitational wave detection, namely power-recycling, detuned signal-recycling and squeeze…
Coherent control of vacuum squeezing in the Gravitational-Wave Detection Band
Henning Vahlbruch, Simon Chelkowski, Boris Hage +3
We propose and demonstrate a coherent control scheme for stable phase locking of squeezed vacuum fields. We focus on sideband fields at frequencies from 10Hz to 10kHz which is a fr…
Quantum engineering of squeezed states for quantum communication and metrology
Henning Vahlbruch, Simon Chelkowski, Karsten Danzmann +1
We report the experimental realization of squeezed quantum states of light, tailored for new applications in quantum communication and metrology. Squeezed states in a broad Fourier…
Review of the Laguerre-Gauss mode technology research program at Birmingham
Paul Fulda, Charlotte Bond, Daniel Brown +7
Gravitational wave detectors from the advanced generation onwards are expected to be limited in sensitivity by thermal noise of the optics, making the reduction of this noise a key…
Experimental characterization of frequency dependent squeezed light
Simon Chelkowski, Henning Vahlbruch, Boris Hage +4
We report on the demonstration of broadband squeezed laser beams that show a frequency dependent orientation of the squeezing ellipse. Carrier frequency as well as quadrature angle…
Experimental demonstration of higher-order Laguerre-Gauss mode interferometry
Paul Fulda, Keiko Kokeyama, Simon Chelkowski +1
The compatibility of higher-order Laguerre-Gauss (LG) modes with interferometric technologies commonly used in gravitational wave detectors is investigated. In this paper we presen…