Abstract

Nonlinear absorption of carbon disulfide $\left({\mathrm{CS}}_2\right)$ was studied in the wavelength region of $420–530\mathrm{nm}$ by using Z-scan method with nanosecond pulses. Large nonlinear absorption was found in the short-wavelength region $(420–460\mathrm{nm})$. The optical limiting properties of ${\mathrm{CS}}_2$ were also studied, and results showed that ${\mathrm{CS}}_2$ has good optical limiting capability in the $420–460\mathrm{nm}$ region. The mechanism of the nonlinear absorption was analyzed by the temporal profile of pulses going through ${\mathrm{CS}}_2$. The large nonlinear absorption is believed to arise from a combination of two-photon absorption and the excited-state absorption induced by two-photon absorption.

© 2007 Optical Society of America

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