As this third pulse approaches the tail of the second one it will also slow down (because the speed of light in the glass it is passing through has been reduced by the second pulse's passage).
Specially, the thermal lens effect is intensified due to the long tail attached to pulse, which leads to decreasing of conversion efficiency if pulse repetition rate is enhanced.
特别由于脉冲附带长的拖尾加剧了热透镜效应，使得脉冲重复频率的增加引起转换效率的降低。
3
The shortcomings of general pulse technique, tail gas technique and stopped-flow technique in catalytic research might be overcome by using pulse catalytic chromatograph branch-flow technique.