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Call me stupid, but what is this used for when pumped with a 1550nm diode? I know that KTP+YVO4 pumped with an 808nm diode makes 532nm, and in that case the crystal is a frequency doubler. But I don't know what this combination does, and I'm very curious.

I have 2 of these, without the power supplies. I have no idea what they came out of. From what I could gather, these are 488nm Argon lasers. The power supplies I've seen are really pricey. Anyone have any thoughts on what to do with these? I want to light one up really bad. I'm considering...

I'm going to add my report on lithium batteries I originally posted someplace else, because it's very relevant to building lasers. It would make a good sticky, but I don't know how to do that, here. Not all lithium batteries are the same, and so they have industry standardized codes for the...

My latest build only had room for 2 AAA cells. I have it running on 2, high drain IMR 10440 cells (not ICR cells), these are the kind that they use in e-cigs and vape pens. It'll run it for 2 minutes or so, at the most. But this is a very impressive showing for such tiny little batteries! I just...

Is that yellow? First time I have heard of such a thing. https://www.laserdiodesource.com/shop/561nm-50mW-scientific-series-laser-module

I have been trying to get the perfect night vision scope dual wave laser dot sight for my BB machine gun together for a very long time, now. I modified an old gen 1 night vision monocular onto an electronics project case from Radio shack that serves as the rail mount, and holds all the...

I had an old 5mw, 532nm pen that sucked particularly bad, so I took it apart, removed the driver board, and pulled the diode out. So just for giggles, I ordered a 400mw, 808nm diode and appropriate driver board, and am waiting on those. But if anyone can possibly answer, I have a couple of...

I am stumped as to the pinout on these cans. There are 4 pins, and 2 marks for polarity. With the pos on the right, and neg on the left, the middle right is red neg, and the outer right is red pos, but nothing gets any infrared. How many combinations of two pins can there be? I even tried...

I really need 2 or 3 more of those, and they seem to be unavailable. Does anyone know of any still out there? Is there any substitute that can make 1-1/2 watts? 1 watt just isn't going to do it for me. I can build a driver that will make the power, but not that will fit in the project's host...

This is a new project made by a friend in Russia, who is a brilliant electronics designer. I'm just going to link to his own thread: BB MACHINEGUN OWNERS GROUP FORUMS - If It Does Not Shoot Metal It Does Not Belong Here :: DROZD MP661K BB Machinegun Owners Group Discussion Forum :: Earn money...

I found out the hard way that 3 AAA batteries is not going to fly for these diodes, especially with the micro flex drive cranked up all the way. Not enough juice. I came up with a last minute solution that saved the build, and make a kick-ass powerful laser out of that silly little 9 LED host. I...

Or thereabouts. I used the Playmates phaser, a Micro Flex driver cranked up as high as I could get it to go on my dummyload, fit into a standard 12mm Aixiz module case, a matching Aixiz coated lens, and this cheap heatsink I found, which is mostly what I wanted to show. I love the parts Jayrob...

Anyone know anything about these? I like the numbers on these, the price in particular, if it can really do 1.8A like they say. Mohgasm 1.8 amp 445nm linear laser diode driver circuit fits inside AixiZ module | eBay

Still looking for a decent quality multiwave for my nightscope project. What I want shouldn't be too hard to find, I want a bright red 650nm, and an infrared 700+nm in one can. I found one in the PHR-803t, but those sucked, they dimmed out really quick. What I really need is one of those dual...

Well, I know what I did, I gave it too much juice on my LM317 test jig, is what I did. But more specificly, it still works, and makes as much light as ever, but it no longer has that "cluster" pattern, that it did, it looks blurred, now, and doesn't focus correctly. The glass window on the diode...

I finally understand the importance of, and have constructed a dummy load (thanks, everyone!!). Let me start by saying that it's constructed wrong, that is, I hurried one together from what I had, which were 4004 diodes, and not 4007 diodes (I ordered some), mine measured a drop of something...

The diodes I got included the coated lens from the dlp projector. Is this good for anything? I have been messing around with that, and a wideband glass lens frame, but I can't find any combination that works. I realize that this is in the largest part, because I don't have even the foggiest clue...

Does anyone happen to know a part number for one of these? I don't mean the new on pcb type, but the older kind, the ones that can fit in a standard module housing. I need to find one for a poject, and I have seen a couple, I haven't been able to find another one, lately.

Hello, I'm brand new to home/hobby lasers, and laser pointers. I do, however, have some experience with military lasers, in the Army, I was a fire support specialist, attached to a brigade HQ company (highly classified). The targeting laser we used in the field was a 5,000 watt, Co2, laser...