Abstract: A laser system for generating two closely spaced in time laser pulses where each pulse is a different color comprises a first and second optical cavity with a common optical leg containing a laser rod capable of emitting light of two polarities along an axis and a polarizing beam-splitter positioned at the common junction of the two cavities for splitting the radiation impinging thereon according to polarity and propagating it into the noncommon sections of the first and second optical cavities each of which contains a Q-switch. The output from the cavities is taken at the polarizing beam-splitter and comprises two closely spaced in time pulses of different polarity. The two pulses are applied to a doubler crystal such that pulses of one polarity are doubled while pulses of the other polarity are unchanged.