Abstract
Multiple-pulse laser induced bulk damage of various types of silica glasses at wavelengths of 532 and 355 nm with laser pulse width of approximately 6 ns repetition rate of 10 Hz were measured. At 532 n, no apparent difference was observed in multiple pulse laser-induced bulk damage threshold (MLIDT) except for As fused quartz (FQ) produced by electrical melting of natural quartz powder whose MLIDT at a constant number of pluses is less than those of the other silicas. MLIDT at 355 nm were different among samples. The MLIDT of FQ disperse much more than that of synthetic fused silica. This could be derived from the distribution of the metallic impurity content in FQ.
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