Ultrafast Imaging of Optical Damage in PMMA (Polymethyl Methacrylate)

摘要

A new imaging system with ultrafast (75 ps) time resolution, the picosecond microscope is used to study the damage dynamics of PMMA irradiated at 532 nm. A small diameter (50 microns), intense laser pulse is used to damage the PMMA, and a larger diameter, delayed probe pulse is imaged onto a video camera detector. The resultant time-dependent images are a motion picture of the damage process. Keywords: Optical damage; Polymethyl methacrylate; Ultrafast spectroscopy; Ablation; Shock waves; Microscopy; Reprints. (JHD)