Experimental investigation of dynamic photo-thermal effect
Year: 2006
Authors: De Rosa M., Marin F., Marino F., Arcizet O., Heidmann A., Pinard M.
Autors Affiliation: INFN, Sezione di Firenze, Via Sansone 1, 50019 Sesto Fiorentino (FI), Italy;
CNR – Istituto Nazionale di Ottica Applicata, Sez. di Napoli, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy;
Dipartimento di Fisica, Università di Firenze and LENS, Via Sansone 1, 50019 Sesto Fiorentino (FI), Italy;
Laboratoire Kastler Brossel, CNRS, Ecole Normale Supérieure, Univ. P. et M. Curie, Case 74, 4 place Jussieu, F75252 Paris, Cedex 05, France
Abstract: In an optical interferometer, a part of the laser power is absorbed by the mirrors and gives rise to surface displacements through thermal expansion. The position measurement sensitivity is, therefore, limited by the shot noise of the absorbed radiation. This phenomenon is called the photo-thermal effect and its typical frequency dependence and size can span over several orders of magnitude, depending on the mirror material and temperature, hence it is crucial to have an accurate model extending over such a large range. We present an extensive experimental investigation of dynamic photo-thermal effects, covering more than seven decades in frequency and including finite mirror size effects (low frequency) and coating effects (high frequency) and showing the dependence on the beam waist. A specific extension of the basic model is being developed that can well explain the results.
Journal/Review: CLASSICAL AND QUANTUM GRAVITY
Volume: 23 (8) Pages from: S259 to: S266
KeyWords: photothermal effect; Fabry-Perot; gravitational wave detectorsDOI: 10.1088/0264-9381/23/8/S33Citations: 6data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-04-21References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here