We adopted amplification with streehed input and double-pass amplification in the oscillation-amplification system of copper vapor lasers. The output power of them was 7% and 8% higher than that of the travelling wave amplifier respectively. The experimental results showed that the time jitter between the output wave form and the input wave form of the amplifier was ±4.0 ns, while the time jitter between the two oscillators was ±9.0 ns.