为了研究等离子冲击波在有机玻璃中的衰减特性，提出了卸载波追赶效应的分析模型。采用自行研制的光偏转测试系统对该冲击波进行了多点测量。得到了强激光诱导的等离子体冲击波在有机玻璃中的传输速度及压力随传输距离的变化关系。结果表明，理论分析模型和实验测试结果能很好地吻合，冲击波在有机玻璃中传输时具有明显的衰减规律，该衰减耗散特性主要源于卸载波的追赶效应。该结论对研究冲击波在介质中传播具有重要的意义。

An analytic model was derived to describe the shock wave attenuation in plexiglass. Experimental measurements were also presented with a well-designed optical fiber sensor based on detection beam deflection. The velocity and pressure of the shock wave were achieved at different distances. Good agreement between the experimental and calculated values of the shock wave pressure was established.