每个脉冲的功率P=
E
t =
0.2
1 0 -8 W=2×10 7W.
1s内激光产生的能量E 1=0.2×10=2J,消耗的电能E 2=2000J,则效率η=
E 1
E 2 =0.001=0.1%.
故答案为:2×10 7,0.1%.