Self-focusing and maximum ablation depth in ultrafast laser surgery of tissue (Conference Presentation)

Chris Martin; Adela Ben-Yakar

doi:10.1117/12.2290777

14 March 2018 Self-focusing and maximum ablation depth in ultrafast laser surgery of tissue (Conference Presentation)

Chris Martin, Adela Ben-Yakar

Proceedings Volume 10522, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVIII; 105220B (2018) https://doi.org/10.1117/12.2290777
Event: SPIE LASE, 2018, San Francisco, California, United States

Abstract

Ultrafast lasers are used to precisely ablate tissue below the surface. The maximum depth of ablation is ultimately limited by scattering and absorption by the tissue. As the depth of ablation is increased, higher laser powers are required to reach the ablation threshold at the laser focus, which leads to nonlinear self-focusing or surface damage. Here, we investigate self-focusing and the maximum depth of ablation in tissue experimentally and computationally. We find the maximum ablation depth in a model porcine tissue for a variety of focusing conditions and pulse widths by imaging ablation voids with third-harmonic generation imaging. The effect of self-focusing is measured by the shift in the focal plane of the ablation void and by the presence of self-focusing induced filaments. Computational models simulate laser pulse propagation and free-electron generation in tissue. Using our experimental data, we fit a nonlinear index to tissue. We then use the model to predict the role of self-focusing and the maximum ablation depth for a range of laser parameters.

Conference Presentation

Citation Download Citation

Chris Martin and Adela Ben-Yakar "Self-focusing and maximum ablation depth in ultrafast laser surgery of tissue (Conference Presentation)", Proc. SPIE 10522, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVIII, 105220B (14 March 2018); https://doi.org/10.1117/12.2290777

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Laser ablation

Ultrafast lasers

Laser tissue interaction

Tissues

Natural surfaces

Third-harmonic generation

Laser scattering

Show All Keywords

Keywords/Phrases

Search In:

Publication Years