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利用探测光束通过轴对称流场时的偏折效应 ,设计了一种光纤传感器 ,并用于探测激光对材料破坏过程中在空气中激发的等离子体冲击波 ,获得了探测位置处激光等离子体冲击波流场折射率随时间的变化率。该方法适用于轴对称流场的瞬态测试 ,具有宽带和非接触的特点
An optical fiber sensor was designed based on the deflection effect of the probe beam passing through the axisymmetric flow field. The probe was also used to detect the plasma shock wave excited by the laser in air during the material failure. The laser plasma shock wave field Rate of change of refractive index over time. The method is suitable for the transient test of axisymmetric flow field, with wideband and non-contact characteristics