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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 2, Iss. 5 — May. 1, 2011
  • pp: 1275–1281

Raman-shifted alexandrite laser for soft tissue ablation in the 6- to 7-µm wavelength range

John Kozub, Borislav Ivanov, Aroshan Jayasinghe, Ratna Prasad, Jin Shen, Marc Klosner, Donald Heller, Marcus Mendenhall, David W. Piston, Karen Joos, and M. Shane Hutson  »View Author Affiliations


Biomedical Optics Express, Vol. 2, Issue 5, pp. 1275-1281 (2011)
http://dx.doi.org/10.1364/BOE.2.001275


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Abstract

Prior work with free-electron lasers (FELs) showed that wavelengths in the 6- to 7-µm range could ablate soft tissues efficiently with little collateral damage; however, FELs proved too costly and too complex for widespread surgical use. Several alternative 6- to 7-µm laser systems have demonstrated the ability to cut soft tissues cleanly, but at rates that were much too low for surgical applications. Here, we present initial results with a Raman-shifted, pulsed alexandrite laser that is tunable from 6 to 7 µm and cuts soft tissues cleanly—approximately 15 µm of thermal damage surrounding ablation craters in cornea—and does so with volumetric ablation rates of 2–5 × 10−3 mm3/s. These rates are comparable to those attained in prior successful surgical trials using the FEL for optic nerve sheath fenestration.

© 2011 OSA

OCIS Codes
(140.2600) Lasers and laser optics : Free-electron lasers (FELs)
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3550) Lasers and laser optics : Lasers, Raman
(170.1020) Medical optics and biotechnology : Ablation of tissue

ToC Category:
Optical Therapies and Photomodificaton

History
Original Manuscript: March 7, 2011
Revised Manuscript: April 10, 2011
Manuscript Accepted: April 14, 2011
Published: April 19, 2011

Citation
John Kozub, Borislav Ivanov, Aroshan Jayasinghe, Ratna Prasad, Jin Shen, Marc Klosner, Donald Heller, Marcus Mendenhall, David W. Piston, Karen Joos, and M. Shane Hutson, "Raman-shifted alexandrite laser for soft tissue ablation in the 6- to 7-µm wavelength range," Biomed. Opt. Express 2, 1275-1281 (2011)
http://www.opticsinfobase.org/boe/abstract.cfm?URI=boe-2-5-1275


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References

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