On Aug 30, 2023, at 10:13 AM, Lindsay Wilson <lindsay@imajeenyus.com> wrote:
Howdy,
A few years ago, when I was contemplating building a solid state laser, I did a bit of reading on LED stuff. The literature I could find mostly had piss-poor efficiencies, even when pumping with 810nm LEDs. (Piss-poor being something like 0.2-0.5%). One intriguing thing I noticed was that Nd:YAG has a pretty decent absorption peak in the visible at around 580-590nm, which is slap-bang in the middle of where yellow LEDs emit. However I couldn't determine if it was possible to pump it there or not.
You can get very high power, compact LED sources using flip-chip emitters such as this:
https://www.aliexpress.com/item/1005005926583554.html
And you can get the individual chips like this:
https://www.aliexpress.com/item/32921772540.html
However whether it's worth the trouble of assembling a couple hundred of them, is debatable!
I eventually was going to try a TIG torch arc in argon, but totally went off the whole project after I bought a 30W fiber laser engraver (and now have a 60W) ;-)
Lindsay
On 30/08/2023 13:18, *Hobbit* wrote:
_______________________________________________I have to wonder, and haven't researched it at all, but with how LEDs have evolved, could those serve for flash pumping by now? As in, "DPSS"... COB phosphor LED types have underlying UV emitters, right? _H* _______________________________________________ Lasers mailing list -- lasers@neurotica.com To unsubscribe send an email to lasers-leave@neurotica.com
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