Talk:Second harmonic generation

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I have substantially revised the article and suggest that someone adds the following external link (to a page under my control):

http://www.rp-photonics.com/frequency_doubling.html Encyclopedia of laser physics and technology on frequency doubling = second harmonic generation

RPaschotta 13:30, 30 Apr 2006 (UTC)

Done. Thanks very much for the revisions, and for not inserting a link to your own site. Your site is excellent and much-used by myself and colleagues, by the way.--Srleffler 22:37, 4 November 2006 (UTC)

Can we have some numbers about maximum real world conversion efficiency? Depending on pulse energy, length, wavelength, rep. rate? I've heard, that flat top ns pulses allow 0.9, while gaus fs only 0.2. Arnero 11:15, 12 July 2007 (UTC)

This is very parameter dependant. If you talk about conversion of a weak signal through a strong pump, you can get close to unity. If you talk about the conversion of all input photons, you are typically limited by the triple harmonic generation which will take some of your signal away. The numbers you have heard of are likely to be valid for a given crystal with fixed experimental parameters only. UnHoly 06:18, 13 July 2007 (UTC)

Can the output-complemend be regenerated over .2? Any lasers do this? -lysdexia 14:12, 21 October 2007 (UTC) —Preceding unsigned comment added by 68.123.4.253 (talk)