The dependence of test-mass thermal noises on beam shape in gravitational-wave interferometers

@article{Lovelace2006TheDO,
  title={The dependence of test-mass thermal noises on beam shape in gravitational-wave interferometers},
  author={Geoffrey Lovelace},
  journal={Classical and Quantum Gravity},
  year={2006},
  volume={24},
  pages={4491-4512}
}
  • G. Lovelace
  • Published 2006
  • Physics
  • Classical and Quantum Gravity
In second-generation, ground-based interferometric gravitational-wave detectors such as Advanced LIGO, the dominant noise at frequencies f ~ 40 Hz to ~200 Hz is expected to be due to thermal fluctuations in the mirrors' substrates and coatings which induce random fluctuations in the shape of the mirror face. The laser-light beam averages over these fluctuations; the larger the beam and the flatter its light-power distribution, the better the averaging and the lower the resulting thermal noise… Expand

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