Membrane Pollution Of Laser To Research On The Effects Of Fused Quartz Component Damage

Optic element load capability is the important factor of high power laser output inhigh power laser driver system. Contamination is the important reason that make laserinduced damage threshold of the optic component reduce. So the study of contaminantinduced damage mechanism of the optical component is a pressing matter of themoment.Contamination by different patterns can be divided into: contamination particlesand film contamination. Through the analysis of contamination, we conducted a laserinduced film contamination of stainless steel damage in fused silica induced byexperimental study, which concluded as follows:1. The definition of contamination which make the high power laser induceddamage of the optical component is given.2. Vacuum canister has been used for collecting contaminant in the sample.Contaminant is analyzed by GS-MS, LC-MS, XPS, ICP-MAS and other instruments.3. Through the experiment analysis of S-on-1method and R-on-1method inmeasuring optical components damage threshold, S-on-1method should be morescientific and accurate. The experiment was using the SAGA-S laser to irradiatesamples and using the S-on-1method to measuring sample damage threshold.4. Pulse laser of6J/cm~2is used to irradiate damage point to obtain the damagegrowth model. based on experimental data after analysis we found that the growth inlateral diameter and depth are exponential with shot number by measurements of laserdamage growth.5. By the thermal absorption model, the sample surface temperature can becalculated, when the energy of pulse laser is7.8J/cm~2.