Laser-induced incubation in transparent materials and possible consequences for surface and bulk micro-structuring with ultrashort pulses

David Ashkenasi; Arkadi Rosenfeld; Razvan Stoian

doi:10.1117/12.461367

1 April 2002 Laser-induced incubation in transparent materials and possible consequences for surface and bulk microstructuring with ultrashort pulses

David Ashkenasi, Arkadi Rosenfeld, Razvan Stoian

Author Affiliations +

Proceedings Volume 4633, Commercial and Biomedical Applications of Ultrafast and Free-Electron Lasers; (2002) https://doi.org/10.1117/12.461367
Event: High-Power Lasers and Applications, 2002, San Jose, California, United States

Abstract

We performed surface and bulk processing experiments on different transparent materials with ultra short laser pulses. The investigations were performed mainly at 800 nm and at pulse widths ranging from 0.2 to 5 ps. We focused our attention on fluence and shot number dependencies to analyze possible incubation effects in the different materials and determine the damage threshold. In the multi- shot experiments we determined strong incubation effects which we attribute to laser-induced defect formation and accumulation. Inside the bulk we were able to generate dots and lines even in sub-micrometers sizes. The structures were analyzed by means of optical microscopy. Laser pulses at a pulse width above ca. 1 ps demonstrate strong self focusing which can be utilized for bulk and rear surface micro structuring. Below a certain pulse width other effects counteract self focusing and beam diffraction and fillamentation seem to dominate. Depending on focusing optics we observe strong differences in the possibility to process the bulk of transparent materials with fs laser pulses which we attribute to the effects in Kerr non- linearity. Also, the consequences of incubation effects on the structuring inside the bulk seem to depend strongly on the pulse width. We discuss the results based on possible technological relevance and the ablation mechanism involved.

Citation Download Citation

David Ashkenasi, Arkadi Rosenfeld, and Razvan Stoian "Laser-induced incubation in transparent materials and possible consequences for surface and bulk microstructuring with ultrashort pulses", Proc. SPIE 4633, Commercial and Biomedical Applications of Ultrafast and Free-Electron Lasers, (1 April 2002); https://doi.org/10.1117/12.461367

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