DC-readout of a signal-recycled gravitational wave detector

@article{Hild2008DCreadoutOA,
  title={DC-readout of a signal-recycled gravitational wave detector},
  author={Stefan Hild and Hartmut Grote and J{\'e}r{\^o}me Degallaix and Simon Chelkowski and Karsten Danzmann and Andreas Freise and Martin Hewitson and J. Hough and Harald L{\"u}ck and M. Prijatelj and Kenneth Strain and J. R. Smith and Benno Willke},
  journal={Classical and Quantum Gravity},
  year={2008},
  volume={26},
  pages={055012}
}
All first-generation large-scale gravitational wave detectors are operated at the dark fringe and use a heterodyne readout employing radio frequency (RF) modulation–demodulation techniques. However, the experience in the currently running interferometers reveals several problems connected with a heterodyne readout, of which phase noise of the RF modulation is the most serious one. A homodyne detection scheme (DC-readout), using the highly stabilized and filtered carrier light as a local… 

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References

SHOWING 1-10 OF 46 REFERENCES

Quantum noise in laser-interferometer gravitational-wave detectors with a heterodyne readout scheme

We analyze and discuss the quantum noise in signal-recycled laser interferometer gravitational-wave detectors, such as Advanced LIGO, using a heterodyne readout scheme and taking into account the

dc readout experiment at the Caltech 40m prototype interferometer

The Laser Interferometer Gravitational Wave Observatory (LIGO) operates a 40m prototype interferometer on the Caltech campus. The primary mission of the prototype is to serve as an experimental

Demonstration and comparison of tuned and detuned signal recycling in a large-scale gravitational wave detector

The British/German gravitational wave detector GEO 600 located near Hannover in Germany is the first large-scale gravitational-wave detector using the advanced technique of signal recycling.

Linear projection of technical noise for interferometric gravitational-wave detectors

An international network of interferometric gravitational-wave detectors is now in operation, and has entered a period of intense commissioning focused on bringing the instruments to their

Squeezed light in a frontal-phase-modulated signal-recycled interferometer

The application of squeezed Light to a frontal-phase-modulated signal-recycled interferometer is considered. We present a simple model to understand the required spectrum of squeezing so as to make

Frequency domain interferometer simulation with higher-order spatial modes

FINESSE is a software simulation allowing one to compute the optical properties of laser interferometers used by interferometric gravitational-wave detectors today. This fast and versatile tool has

Frequency-domain interferometer simulation with higher-order spatial modes

FINESSE is a software simulation allowing one to compute the optical properties of laser interferometers used by interferometric gravitational-wave detectors today. This fast and versatile tool has

Nonstationary shot noise and its effect on the sensitivity of interferometers.

TLDR
By taking into account the additional noise contribution from the modulated shot noise, the 3-dB discrepancy between the measured sensitivity of the Garching prototype detector and the theoretical shot-noise limit is reduced to about 1.5 dB.

Modulation, signal, and quantum noise in interferometers.

  • MeersStrain
  • Physics
    Physical review. A, Atomic, molecular, and optical physics
  • 1991
TLDR
It is seen that the mixing in of quantum noise from different modes of the vacuum can degrade the signal-to-noise ratio of a measurement in a variety of apparently different physical situations.

Adaptive thermal compensation of test masses in advanced LIGO

As the first generation of laser interferometric gravitational wave detectors nears operation, research and development has begun on increasing the sensitivity of the instrument while utilizing the