Help & advice need on how fs laser beam propergate in glass

[Jim Tan]

Hi all,

can someone kindly advice on how to model a femtosecond laser beam profile when it is focus on/into a transparent material.

Regards

Jim

 

[Andy Resnick]

This problem has been analyzed in excruciating detail. What have you found out so far?

 

[Jim Tan]

Hi Andy,

i did some experiment & found that the laser machined profile varies with polarziation.

Thus i want to verify my observation with some modelling, but i was unsure what are the equations & approach to this.

any suggestion or recommendation. Tks.

 

[Andy Resnick]

Then the first step is to see what other people have tried:

http://scholar.google.com/scholar?q...arization&hl=en&as_sdt=0&as_vis=1&oi=scholartC. W. Hee, B. K. A. Ngoi, L. E. N. Lim, K. Venkatakrishnan, W. L. Liang, Effect of polarization on femtosecond pulsed laser ablation of surface relief gratings using a novel interferometer, Optics & Laser Technology, Volume 37, Issue 2, March 2005, Pages 93-98, ISSN 0030-3992, DOI: 10.1016/j.optlastec.2004.02.016.
(http://www.sciencedirect.com/science/article/B6V4H-4C76CY9-1/2/845fffb5cc8bb9634c2a3255a965ff05)

The effect of polarization on ultrashort pulsed laser ablation of thin metal films
Venkatakrishnan, K. Tan, B. Stanley, P. Sivakumar, N. R.

This paper appears in: Journal of Applied Physics
Publication Date: Aug 2002
Volume: 92 Issue: 3
On page(s): 1604 - 1607
ISSN: 0021-8979
Digital Object Identifier: 10.1063/1.1487453
Date of Current Version: 18 June 2009