Thats impossible to tell without knowing the pulse width and repetition rate. The later you can probably figure out easily by counting the pops. Lets assume it has a 100 uS pulse width and 1 Hz firing rate - at 3 kW peak power, that'd result in 300 mW average output.
So I'll ask again. How long would you need to run a 200mW laser until you have reached the energy output of a SINGLE pulse from the pulsed laser?