Optical detection system using time structure of UVSOR for combined laser-SR experiments

A new TAC-MCA detection system has been developed for combined laser-SR spe ctroscopy such as two-photon excitation or pump-probe experiments in the VU V region. In order to improve the signal to noise ratio, the time structure under partial-filling operation of UVSOR is utilized together with this de tection system. In our experiment, where the two-photon excitation efficien cy of laser and SR is more important than the time resolution, a pulse stre tching technique using optical fiber is applied to the output pulse of a CW mode-locked Ti: sapphire laser. The usefulness of the present system is su ccessfully demonstrated by observing luminescence signals from the two-phot on-excited core state in BaF2 crystals. (C) 2001 Elsevier Science B.V. All rights reserved.