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, 263(1-2), 1999, pp. 21-26
Citations number
17
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS A
ISSN journal
03759601 → ACNP
Volume
263
Issue
1-2
Year of publication
1999
Pages
21 - 26
Database
ISI
SICI code
0375-9601(19991122)263:1-2<21:WMOMTN>2.0.ZU;2-5
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.