Advanced LIGO

@inproceedings{Collaboration2014AdvancedL,
  title={Advanced LIGO},
  author={The Ligo Scientific Collaboration},
  year={2014}
}
The Advanced LIGO gravitational wave detectors are second generation instruments designed and built for the two LIGO observatories in Hanford, WA and Livingston, LA. The two instruments are identical in design, and are specialized versions of a Michelson interferometer with 4 km long arms. As in initial LIGO, Fabry-Perot cavities are used in the arms to increase the interaction time with a gravitational wave, and power recycling is used to increase the effective laser power. Signal recycling… 

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