Burning damage threshold and combustion wave spread velocity of fused silica induced by long pulsed laser

In order to study the fused silica's damage process under the action of long pulsed laser, this paper established automated diagnostic system,which according to the characteristics of combustion wave which generated in the process of laser induced damage that it has obvious radiation in visible light band, and calculated the damage threshold of fused silica according to the system. Shadow method is used to establish the measurement experiment of spread velocity of combustion wave caused by long pulsed laser.