Wavelength dependency of soft tissue coagulation with a tunable cw laser

Eric K. Chan, Behrang Amini, Jennifer Barton, Ashley J. Welch, Sharon L.M.D. Thomsen, Robert C. Stoneman, Leon Esterowitz

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A CW Tm:YAG laser with a tuning range from 1.86 to 2.08 μm was used to create thermal lesions on chicken breast, calf liver, and porcine cornea. All tissue types were exposed to a constant irradiance (450 mW, 0.92 mm spot diameter, 0.5 and 1.0 second exposures) at five different wavelengths about the 2 μm water absorption peak. We estimated tissue absorption coefficients from the thermal history recorded by a 8 - 12 μm thermal camera. Our data confirmed that the absorption of all tissue types tested followed the water absorption curve. The effect of these differences in absorption upon the coagulation lesion size was evaluated by histologic measurements.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Number of pages12
StatePublished - 1996
EventLaser-Tissue Interaction VII - San Jose, CA, USA
Duration: Jan 29 1996Feb 1 1996


OtherLaser-Tissue Interaction VII
CitySan Jose, CA, USA

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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