Abstract

Simultaneous emission induced by one- and two-photon absorption from the charge-transfer band from aqueous solutions of europium perchlorate pumped by a repetitively pulsed nitrogen laser have been detected. These processes were verified both through the measured fluorescence intensity as a function of the laser flux and from a qualitative analysis of the two overlapping characteristic broad emission spectra, which are dependent on the excitation wavelength. A theoretical fit could be made to the laser-power-dependence data, which gave a two-photon absorption coefficient of approximately 4 × 10⁻⁴⁹ cm⁴ sec/photon-molecule for this system.

© 1978 Optical Society of America

Multiphoton absorption of OsO₄ under two-CO₂-laser pulse excitation

R. V. Ambartzumian, G. N. Makarov, and A. A. Puretzky
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XeF(B → X) laser optically excited by incoherent Xe₂*(172-nm) radiation

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