Our femtosecond laser laboratory is equipped with pump-probe and fluorescence upconversion techniques, which allow study of ultrafast processes in both fluorescent and nonfluorescent samples. This laboratory is equipped with a femtosecond Ti: Sapphire oscillator of 80 MHz repetition rate (MaiTai, Spectra Physics, USA). A part of this laser beam is converted to second/third harmonic for fluorescence upconversion (CDP Systems, Russia) measurements. The remaining part of the beam is used for amplification through a Ti: sapphire regenerative amplifier, (Spitfire Ace, Spectra Physics, USA) operating at 1 KHz repetition rate. 75% of the amplified output is directed into an optical parametric amplifier
(TOPAS-Prime, USA) to generate a range of excitation wavelength (350-1600 nm). The other part of the amplified beam is used for the generation of white light by using nonlinear optics (CaF2/ Sapphire crystal) to monitor the excited state absorption and dynamics.