The present invention relates to a high-voltage pulse generator comprising a “frozen-wave” generation system (1) for generating high-voltage pulses and a trigger system (2) for triggering said pulses, said generation system (1) comprising a first (14) and a second (15) photoconductor element, characterized in that said triggering system (2) comprises means (21) for generating a laser light beam (F) and means (22, 23) for splitting said laser beam (F) into two laser beam fractions (F1, F2), each laser beam fraction (F1, F2) being directed onto a photoconductor element (14, 15) of the generation system (1), said splitting means (22, 23) being capable of controlling the distribution of the respective powers of said two laser beam fractions (F1, F2) as a function of the orientation of the polarization of the laser beam (F). The present invention also relates to a facility comprising multiple high-voltage pulse generators and electrooptic pump-probe equipment operating such a high-voltage pulse generator.