Abstract
Repetition rate-dependent absorbance measurements of synthetic fused silica at 193-nm
irradiation are performed in the range of 50-1 000 Hz with an ArF laser calorimeter. The "apparent"
single- and twophoton absorption coefficients are determined by measuring the laser
fluence-dependent absorbance of fused silica samples with different thicknesses to separate the
surface absorption and bulk absorption. The measurement results indicate a reversible nonlinear
increase of both apparent single- and two-photon absorption coefficients with increasing repetition
rate for the synthetic fused silica, whereas the surface absorption shows no dependence on the
repetition rate.
© 2013 Chinese Optics Letters
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