Dynamics of Laser-Induced Shock Wave in Silica/ Dynamika Laserowa Indukowana W Fali Uderzeniowej W Krzemionce

Abstract

The study of detonation-like mode of laser induced damage propagation was considered. Velocity of this propagation is two orders of magnitude faster than known published data on burning fiber glass. The condition of optical fiber and enough long laser pulse let us obtain laser induced damage propagation passing near hundred own core diameters during pulse. The using as target the core of silica-based optical fiber has some diagnostic advantages. It allows spatially splits "start" and "stop" points and to supply the same form of energy deposition in every cross section of optical fiber. Tested regime demonstrates near constant velocities during 250 ns in the range of laser intensity 2-4.5 GW/cm[2].