# 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} }

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

#### 13 Citations

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