Saturated absorption and reverse saturated absorption of Cu:SiO₂ at <i>λ</i> = 532 nm

Abstract

Abstract Nonlinear absorption in copper‐doped silicate glasses was investigated by the Z‐scan technique using second harmonic radiation of a Nd:YAG laser ( λ = 532 nm, τ = 55 ps). The simultaneous influence of saturated and reverse saturated nonlinear absorption processes was analyzed. The nonlinear absorption coefficient and the saturation intensity of copper‐doped glasses at laser intensity of 5.4 × 10 9 W cm −2 were measured to be 6 × 10 −6 cm W −1 and 4.3 × 10 8 W cm −2 , respectively. (© 2004 WILEY‐VCH Verlag GmbH &amp; Co. KGaA, Weinheim)