your first post and you have a question like that...well, you are not providing enough information to even get started to answer the question. If you have a femtosecond laser and you do not know the answer to this question, something is fishy with your post to begin with. With a name like alex it is probably not a language barrier thing. If you are at university, ask your professor. If you are the professor...hmmmmmm. Your question is vague at best, Sorry, not trying to be an ass but regroup, rethink, repost.
Last edited by Laserman532; 09-11-2012 at 08:52.
Pat B
laserman532 on ebay
Been there, done that, got the t-shirt & selling it in a garage sale.