Product Code: ICA12_M1005

Non-Dimensional Evaluation of Nonlinear Absorptivity in Internal Modification of Glass Using USLP
Authors:
Isamu Miyamoto, Osaka Univ., Erlangen Graduate School of Advanced Optical Technologies (SAOT); Hyogo Japan
Kristian Cvecek, blz - Bayerisches Laserzentrum; Erlangen
Michael Schmidt, Erlangen Graduate School of Advanced Optical Technologies (SAOT), blz - Bayerisches Laserzentrum, Erlangen-Nuremberg Univ.; Erlangen
Presented at ICALEO 2012

A simple non-dimensional equation has been derived
to evaluate nonlinear absorptivity in simplified nondimensional
form, if the cross-sectional area of the
molten region is experimentally given in internal
melting of glass by ultrashort laser pulses at high pulse
repetition rates. Based on a series of experimental
results using different glasses including D263, Foturan
and fused silica in wide variety of experimental
conditions, it is shown that the evaluated nonlinear
absorptivity has an excellent correlation with the
results obtained by previously reported simulation
model.