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I have no problem with "Obozo" (I don't see you using any worse names?), call people clowns all you want. I'm not sure it does much to strengthen your arguments, but that's up to you. But I have absolutely zero respect or patience for people who bring racism into things like this. Insult the...

First, way to go racism! Second, the FICA taxes this year were simply restored to normal levels after a 2-year "tax holiday". Funny, everyone is complaining now, but nobody seems to remember when their taxes magically went down 2 years ago. It was a TEMPORARY tax holiday to help the economy...

Yes, people make laser diodes as a career. At this point, that's me. I'm not sure if I'm still going to be doing it in 6 months, but as of right now I research and invent new laser diodes. Laser diodes are mostly made by electrical engineers and materials scientists with advanced degrees, but...

This is simply the data I've seen so far, what they have made publicly available. Things can and do change all the time, so who knows what production diodes will look like. These are certainly hero devices, and production doesn't happen until you have some amount of yield. But the hero...

Where's the best place to buy PHR diodes now? Prefer a reputable storefront, with options like in modules or not in modules, but I haven't kept up with any of this to know where to get some. Last time I bought some of them it was from HighTechDealz, they still any good? The website looks like...

Close, but not quite. They can do better than that. The idea of semipolar GaN is given pretty much correctly, but it's the details that sometimes matter most. They're growing on the 20-21 plane, which is not 45 degrees off of m-plane or c-plane. 20-21 is tilted 15 degrees off of m-plane...

Ya, but I only put it in the Vet's section. No problem for someone else to post it here, I suppose.

No, you clearly didn't get my point. My point was the difference you'll see is small, and it could be different in different hosts/applications/etc. And if you want to make a real difference, then you need to expand your arbitrarily-narrow set of conditions. You're also leaving out some...

If you care about diode runtime and long life, then you don't put them in a handheld to begin with, and you definitely don't run them at more than twice the rated current as many do here. It's all relative. You get even better runtimes and even longer life with active cooling via TEC. You get...

Re: humidity, you minimize the likelihood of ESD at about 50% humidity. The cleanrooms where semiconductor wafers are made are typically held at 50% humidity for this reason. The environment is going to be oxidizing no matter what you do, so you mitigate that in other ways and control humidity...

Oh yeah, that part too. The quick, hand-waving, unqualified answers are: blueshift is from band-filling, redshift is from bandtail states. But that's completely unqualified, that's just always the first answer that comes out, whether it's actually right or not. For a more complete picture...

So you're over-complicating it slightly, and there are some different things going on. So I think the main question is this: 405nm is ~3.06eV, so why do you need more than 3.06V to generate light at 405nm? Well first, you said part of the answer in your own question without realizing it: Do...

A diodes have 3 anode and 3 cathode wires. M diodes have 4 anode and 4 cathode wires. H diodes have 4 anode wires, 4 cathode wires, and a 9th wire that attaches to a square component on the submount, essentially wired in parallel to the diode. My guess is a Zener diode for reverse bias...

M, H, A. The die itself is indistinguishable. Same length, same width, the ridge is the same 15um wide. There could be internal differences, but visually identical. The submount is different, the laser die is not.

I'm late getting back to this party, but that's not totally correct. There is an extra bond wire, but the die is exactly the same size. The die itself is visually indistinguishable between all 3 types. The submount is a little different, the die itself is not.

Breaking a diode? No problem. Happens to everybody, all the time, move on. You should try making the things and killing a few dozen lasers on-wafer with one tiny little slip of the tweezers. Done that plenty of times. Or having a laser probed up and running when somebody bumps the table...

Yes. Every single diode is tested individually. Likely multiple times. After cleaving the facets, after dicing/device singulation, and after packaging are 3 very likely times for every single device to be tested. At a bare minimum, every single one is tested and binned before shipping to the...

The cost of silicon has nothing to do with it, because these diodes aren't made of silicon. The only silicon in the whole diode is the n-type dopant, which is a miniscule amount in only part of the diode. They're made of gallium nitride, which is very difficult to make, and a heck of a lot...

BTW, my inner 6-year-old was loving that. "I know something you don't know!!1!". Because let's face it, who isn't beholden to their inner 6-year-old at times? But seriously, it's cool: It's the active region, the quantum wells. How cool is that? Take all the images together, for scale. On...

None of them are from Nichia. Nope. Nah. It is spectacularly straight though, you're right. Nah. It's not visible in the optical images, only in the electron microscope image. What you're talking about is done, you can see it on the top corners of the 2nd and 3rd optical microscope...