Abstract

Some experiment results on nanosecond XeCl laser (at 308 nm) ablation of polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), thrombus, artary, mycardial, and eyeball cornea are reported, and, morever, are contrasted to the results on the photoablation with nanosecond (NS) and picosecond (psec) YAC laser at 1.06 µm and at 0.53 µm. The bonds energy of C-O bond and C-C bond of PMMA are separately 3.6 ev and 4.03 ev. We have theoretically computed and demonstrated that the photochemical contribution on PMMA by UV excimer is a synthetical action process of combining single-photon contribution by UV excimer, and is a synthetical action process of combining singlephoton with multiphoton contribution, with stress on the former. Morever, we have separately deduced the mathematics equation describing (lie ablation depth by means of contribution of single-photon and multiphoton.

© 1991 Optical Society of America