Volume 47, Number 5, September I 1999
|Page(s)||545 - 551|
|Published online||01 September 2002|
High-sensitivity optical measurement of mechanical Brownian motion
Laboratoire Kastler Brossel , case 74 4 place Jussieu, F-75252 Paris Cedex 05, France
Accepted: 1 July 1999
We describe an experiment in which a laser beam is sent into a high-finesse optical cavity with a mirror coated on a mechanical resonator. We show that the reflected light is very sensitive to small mirror displacements. We have observed the Brownian motion of the resonator with a very high sensitivity corresponding to a minimum observable displacement of .
PACS: 05.40.Jc – Brownian motion / 04.80.Nn – Gravitational wave detectors and experiments / 42.50.Lc – Quantum fluctuations, quantum noise, and quantum jumps
© EDP Sciences, 1999
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