Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1995),
  • paper CThI10

Photoacoustic effects of femtosecond optical breakdown in biological tissue and water

Not Accessible

Your library or personal account may give you access

Abstract

Photodisruption with high-power near-infrared laser pulses has become a well-established tool for intraocular microsurgery since the 1970's. Surgical effects of these lasers are based on optical breakdown at the focus of the laser beam due to the high-intensity electric field. The plasma initially expands with hypersonic velocity due to its high pressure and temperature. A shock wave is emitted when the plasma expansion decreases to subsonic velocity. Further expansion of the plasma results in the creation of a cavitation bubble. There are indications that the primary surgical effect is tissue evaporation by the laser plasma, while shock waves and cavitation bubbles may cause collateral tissue damage or undesirable surgical effects.1,2 Previous results with picosecond laser pulses indicate that the size of the photoacoustic side effects can be decreased by using shorter pulses for intraocular surgery.2 To assess the potential of a femtosecond intraocular surgical laser in comparison to the techniques presently used, we have investigated the shock-wave emission and cavitation-bubble formation after femtosecond optical breakdown in corneal tissue and water with time-resolved flash photography.

© 1995 Optical Society of America

PDF Article
More Like This
Corneal Surgery Procedures with an All-Solid-State Femtosecond Laser

F.H. Loesel, T. Juhasz, C. Horvath, R.M. Kurtz, and G. Mourou
CThL2 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 1998

Experimental Investigation of shock waves and cavitation bubbles generated by picosecond optical breakdown in water and biological tissues

T. Juhasz, X. H. Hu, L. Turj, and Z. Bor
CTuN88 Conference on Lasers and Electro-Optics (CLEO:S&I) 1993

Intrastromal corneal surgery with femtosecond laser pulses

Xinbing Liu, Ron M. Kurtz, Alan Braun, Hsiao-Hua Liu, Zacbary Sacks, and Tibor Juhasz
CTuT5 Conference on Lasers and Electro-Optics (CLEO:S&I) 1997

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved