http://www.cnr.it/ontology/cnr/individuo/prodotto/ID57845

Experimental investigation of dynamic photo-thermal effect (Articolo in rivista)

Type

Label

Experimental investigation of dynamic photo-thermal effect (Articolo in rivista) (literal)

Anno

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

Alternative label

De Rosa M., Marin F., Marino F., Arcizet O., Heidmann A., Pinard M. (2006)
Experimental investigation of dynamic photo-thermal effect
in Classical and quantum gravity (Print)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Pagina inizio

Pagina fine

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Rivista

Note

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INFN - Sezione di Firenze (Italia); INOA-CNR Sezione di Napoli (Italia); Dipartimento di Fisica (Università di Firenze); LENS (Italia); CNRS - Laboratoire Kastler Brossel (France); Ecole Normale Superieure, Univ. P et M Curie (France). (literal)

Titolo

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. (literal)

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