This paper experimentally shows that (1) the intensity evolution of green (510.6 nm) and yellow (578.2 nm) pulses of a copper vapor laser oscillator from lasing to steady operation, (2) the effect of switching delay time in an oscillator/amplifier system on the amplitudes and the relative delay between both pulses. It is demonstrated that for a B6G-dye laser, the conversion efficiency not only depends on the intensity ratio, but also on the relative delay of the green and yellow pulses.