Wide-band measurement of mechanical thermal noise using a laser interferometer

Authors
Kajima, M Kusumi, N Moriwaki, S Mio, N
Citation
M. Kajima et al., Wide-band measurement of mechanical thermal noise using a laser interferometer, PHYS LETT A, 264(4), 1999, pp. 251-256
Citations number
17
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS A
ISSN journal
03759601 → ACNP
Volume
264
Issue
4
Year of publication
1999
Pages
251 - 256
Database
ISI
SICI code
0375-9601(199912)264:4<251:WMOMTN>2.0.ZU;2-U
Abstract
We have measured the displacement thermal noise of a mechanical cantilever, made of phosphor bronze, using a laser interferometer. The measured noise spectrum agrees well with an estimation based on the fluctuation-dissipatio n theorem with a mechanical-admittance measurement. The frequency range whe re we could measure the thermal noise was from 50 to 500 Hz; this range is important for the noise characterization of interferometric gravitational w ave detectors. (C) 1999 Elsevier Science B.V. All rights reserved.