Interplay of Fluence and Wavelength in Soft Tissue Ablation with an IR-FEL
Abstract
Previous investigations of soft tissue ablation with infrared Free Electron Lasers have found conflicting wavelength dependences for the ablation efficiency. One variable that differed in these studies was fluence. Thus, we want to systematically investigate the effect of fluence on the observed wavelength-dependence. In our experiments, ablation efficiency is measured via the number of laser pulses required to perforate a porcine cornea. For 5μ s superpulses of a Mark-III FEL, we have measured ablation efficiency for several wavelengths between 2-9 μ m and for fluences between 5 and 60 J/cm^2. At the surgically relevant wavelength of 6.45 microns we find that the ablation efficiency increases with fluence over this range.
- Publication:
-
APS Southeastern Section Meeting Abstracts
- Pub Date:
- November 2004
- Bibcode:
- 2004APS..SES.MD002H