Adjusting the pulse width of the laser to the thermal relaxation time of the absorbing construction can avoid thermal side effects and facilitate a selective treatment of the selective cells.
把激光脉宽调整到与吸收颗粒的热弛豫时间一致可以避免热副作用，可对所选细胞产生选择性处理。
2
It was revealed that the cross relaxation increased with intensity of the excitation, which resulted in the decrease of polarization factor with the input pulse area.
分析表明，交叉弛豫随激发场强度增大，并导致偏振因子随激发场入射脉冲面积减小。
3
The spontaneous relaxation of upper levels is considered in numerical solutions. The calculation results show the evolution of pulse energy and the distribution of ionization particle.