Energy-partition diagnostic for measuring time-resolved scattering and absorption in burst-mode laser ablation
Z Qian1, J E Schoenly1, A Covarrubias1
1Department of Physics and Institute for Optical Sciences, University of Toronto, Toronto M5S 1A7, Canada.
Abstract:
We describe an energy-partition diagnostic based on integrating sphere principle for measuring absorption and scattering in plasma-mediated ablation by a high repetition-rate (133 MHz), pulsetrain-burst ultrafast-pulse laser. The system time-resolves the partition of elastically scattered laser light into specular reflection, diffuse reflection, and transmission, giving access to per-pulse absorption dynamics. Physical events such as optical breakdown and incubation effects in glass and aluminum are illustrated.
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