Quantitative information from time series: Cr : yttrium-aluminum-garnet cross-section measurement

A. M. YACOMOTTI; G.B. MINDLIN; O.E. MARTÍNEZ

PHYSICAL REVIEW A - ATOMIC, MOLECULAR AND OPTICAL PHYSICS

AMER PHYSICAL SOC

Año: 1999 vol. 60 p. 663 - 666

1050-2947

Ln this paper we show how to use the richness of the dynamic responses of a physical system to perform a nontrivial measurement. In particular, we have calculated the Cr:YAG (YAG denotes yttrium aluminum garnet) absorption cross section in an optical system, namely, a solid-state laser (Nd:YAG) with a saturable absorber (Cr4+:YAG), via the parameters fitting from time series. The technique consists of minimizing a chi(2) function which is constructed by transforming the original rate-equation system into its standard form. The value obtained for sigma(a), (2.5 +/- 0.3) x 10(-18) cm(2), is consistent with previously reported results that had dispersion of more than one order of magnitude.