This is an old revision of this page, as edited by Srleffler (talk | contribs) at 16:38, 13 January 2018 (Archived.). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
Revision as of 16:38, 13 January 2018 by Srleffler (talk | contribs) (Archived.)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff) Archives |
|---|
Hi, feel free to leave me a message. Kindly leave messages on new topics at the bottom of this page. Srleffler
M squared
Hi, I absolutely agree with your interpretation of focus size vs M2. Why don't you put this explanation in the article? The way it is presented now is misleading: it is not clear that the comparison is between the multimode beam and the embedded Gaussian, rather than the Gaussian of the same size. Actually, most people working on laser applications are looking for a simple answer to the question: "I have a beam of a given size and a given M2. What is the minimum size I can focus it to with a given lens?". And the answer they get in the "Applications"(!) section of the article is "M times larger than a Gaussian at same wavelength". So they calculate the size of the focus of a same-size Gaussian and multiply it by M. — Preceding unsigned comment added by Mpolyanskiy (talk • contribs) 23:10, 11 January 2018 (UTC)
- Good idea. Done.--Srleffler (talk) 16:30, 13 January 2018 (UTC)