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That's an LED, and it's only 365nm. DARPA is looking lasers and LEDs, and more to the point of this thread, they're looking for lasers down to 250nm. Lasers are much harder to make. It's a LONG way to go from 365nm to 250nm. Not even close to the same thing. For more perspective, the first...

This is one team that is a part of a very large DARPA program aimed at mid-UV light emitters. Here's a preliminary announcement of that program: Semiconductor Today This is a big program with multiple contracts going to several different organizations, for both UV LEDs and UV lasers. This...

Other articles about the same stuff, with relevant quotations: Physicists Build World’s First Antilaser | Wired Science | Wired.com NewsFactor Network | Anti-Laser Could Boost Development of Optical Computers So yeah, there'll be applications. Not a quantum leap, but a cool step in the...

From the article: It absorbs a single color of laser light, and no other colors. That's cool, and potentially very useful for switching, which is one of the basic building blocks of computing as we know it today. Optical computing, like quantum computing, is still at a very basic level, and...

Sorry, I know nothing about this topic.

I've watched a diode kill itself in a microscope, probably from overcurrent, not from ESD though. (I haven't personally ever had a diode die from ESD, even when taking only minimal precautions.) But watching the damage happen live is pretty cool. The ones I've watched happen in a microscope...

You can't buy them. Sorry. Well, I suppose there's always a way to buy them. But if you're worried in any way about price at this point, then they probably aren't for you. And the 750mW lasers are single mode, they've reported 4W multimode. And no 635nm from Soraa, they work on nitride...

Edit: I mean yesterday, it passed the senate yesterday afternoon.

See, all this is why I deleted my first post after further thought. Should've done it sooner, but I didn't do it fast enough. For the record, I was laughing at the idea of anyone buying those diodes, not you in particular in any way.

Word. LOL :rolleyes: This is answered pretty well above already, but it's a big "it depends". It depends on a lot of things. So maybe, maybe not, but if you feel strongly about it you can volunteer to be the first to test your brand new diode in the future to see what it can handle. :gj...

I deleted too, but not fast enough, oh well. It's just you don't really know much about laser diodes...at all...and yet you're sticking your neck out to purchase them from some unknown source and resell them. Yeah, you can look at a data sheet and all, but you don't seem to know NEARLY enough...

The F-35 is NOT replacement for the F-22. The F-22 is an air superiority fighter, replacing the F-15. The F-35 is the Joint Strike Fighter, and is meant for a completely different role. In the Air Force, it will replace the F-16. In the Navy and Marines, it will have different packages to...

Violet diodes and blue diodes are made of pretty much exactly the same materials. The packaging may be different, such as the strength of the window and its glue, hence why "bumping" it could break it. No matter how sensitive your electronics are, physical contact such as "bumping" is never a...

Yeah, I'm an idiot, I forget the phase flip is only when going from low-to-high index. I work with DBRs typically, in which the 1/4-wave thickness repetition results in an HR coating, so I get that confused.

:rolleyes: indeed. Perhaps I should've written a bit more about the design/engineering aspect, and how it relates to the fact that you can create destructive or constructive interference, selectively, at your eardrum. Like the image in Bluefan's post, you can use the same 2 point sources...

To fix one confusion here: an AR film often uses a half-wavelength film thickness.A quarter-wavelength thickness can also result in an HR coating. A DBR, which is how high-reflectivity mirrors are made on laser diode facets, is a stack of alternating films, where each is a thickness of a...

The ESP is 25dB active + much MORE passive, I'd venture to guess the passive isolation alone is around 40dB (I don't honestly know what it is though). With the batteries out of my ESPs, the isolation is still better than foamie earplugs in my experience. With 25dB isolation only, a 130dB noise...

Ummmm.....ok.....I'm not sure what you're trying to say. First, I know the guy that owns ESP, his name is Jack, real nice guy. And I am also friends with one who used to be one of biggest distributors. I like Jack, I like his company and how he does business, I trust him, and I LOVE his...

Plugs.

Considering a railgun projectile travels an order of magnitude farther than currently possibly with a cannon, such a comparison is difficult (modern cannons fire tens of miles, they're talking about a 200+ mile range with this thing) The better comparison is comparing railguns to cruise...