Room temperature gravitational wave bar detector with optomechanical readout

Year: 2003

Authors: Conti L., De Rosa M., Marin F., Taffarello L., Cerdonio M.

Autors Affiliation: INFN, Sezione di Padova and Università di Padova, Padova, Italy; INFN, Sezione di Firenze and Dipartimento di Fisica, Universita` di Firenze, and LENS, Sesto Fiorentino (Firenze), Italy

Abstract: We present the full implementation of a room-temperature gravitational wave bar detector equipped with an optomechanical readout. The bar mechanical vibrations are read by a Fabry-Perot interferometer whose length changes are compared with a stable reference optical cavity by means of a resonant laser. The detector performance is completely characterized in terms of spectral sensitivity and statistical properties of the fluctuations in the system output signal. This kind of readout technique allows for wide-band detection sensitivity and we can accurately test the model of the coupled oscillators for thermal noise. Our results are very promising for cryogenic operation and represent an important step towards significant improvements in the performance of massive gravitational wave detectors. (C) 2003 American Institute of Physics.

Journal/Review: JOURNAL OF APPLIED PHYSICS

Volume: 93 (6)      Pages from: 3589  to: 3595

KeyWords: Cryogenics; Detectors; Fabry-Perot interferometers; Lasers; Oscillators (mechanical); Thermal noise; Vibrations (mechanical), Gravitational wave bar detectors, Gravity waves
DOI: 10.1063/1.1544077

Citations: 29
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