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I was also thinking about 1064nm ND:YAG lasers. If we want to have a Q-switched laser, as mentioned above by farbe2 , wouldn't that work? Or we could even frequency double it to 532nm if needed.

Wait a second! Wouldn't it be possible to use a MM laser with a prism* to split the light and then we could isolate the frequency we want/is the strongest, and direct that at our target? * I think that there are mirrors and/or other optical devices that can do this as well, I just don't recall...

Not really. Currently, the diodes I have are based around trying to get experience with lasers. They're not really practical for anything other than laser pointers. Which is fine, but not for what I'm trying to do. Shipping will take a bit, but I can get the BRD209 or another laser in the...

Maybe I missed it, but how powerful is that ruby laser? I mean, I have no idea how to tell what would work from what would not in the way of ruby lasers unless I have more info.

The laser that we have selected, BDR209, is designed to be pulsed and at 2x the normal optical output power. I was assuming that we all knew that, but I guess not.

4 inches or closer. Theoretically, I can use a mirror to redirect the beam to another area (for just the laser diode and optics), thus eliminating any distance considerations. No, but I'm willing to learn. Thanks!

At the risk of sounding dense, how do I find the lenses that you suggest? Like what keywords or websites?

@WizardG , thanks, I should have recalled that. So now I know that I should be looking for a diode SLD3237VF (that's what's in BDR209). But what optics should I be using? Being able to adjust the focus so that I can get a spot that is a few um in size is no ordinary feat. Granted, a cylinder...

The main factor is that the material should be fairly tough, while being not electrically conductive. I could use thin paper, provided that I could stretch it so that it would be a flat plain. Likewise, I could use any sort of plastic wrap or other material. I know I'll have to experiment. I...

Hello, TLDR: See bottom. I've written this in long form for completeness. I'm sure I'd get a lot of questions otherwise. So for some time I've had the option of getting a laser attachment for my 3D printer, but I never opted for that, because all I'd do with it is some engraving which wasn't...

Please don't hijack the thread. That being said, maybe you wanted to ask me in particular? I think this is what you are looking for: https://www.ebay.com/itm/292286131264

Thanks, that answers my question. But I am curious, what is "big mode" pumping? I tried googling it, but I'm not getting anything useful.

I was thinking of using Xenon flash tubes in a double ellipse configuration. There are several such tubes on ebay, like this one. https://www.ebay.com/itm/202562595779 Granted, Krypton would be more efficient, but those tubes cost 2x or more than the xenon tubes.

So the only real improvement that an increase in rod length brings is a larger area to cool?

That was a good place to start. But only for 532nm crystal laser pumping. There's nothing there on length, dimensions, or size for Nd:YAG rods. I don't have access to a university.

When I said I already did, I really do mean it (Gah! I can't post links... Gah 2x, you have a link so I can't quote you!) Ok, a picure then... I searched the wikipedia article, but didn't see anything about rod length or rod dimensions. Now I don't expect a dissertation, I expect a link or two...

I searched online but couldn't find any information at all. Likewise in the forum, but the search function broke Nd and YAG into separate tokens and so it became too small and too common to search for. In case it makes a difference, I'm assuming that the rod is being pumped with 820nm light...

Thanks @Alaskan that's exactly what I was looking for.

Thanks, that answers my question quite well. But if I can ask a related one, why does the amount of 532nm light increase only to a certain point and then though the amount of 808nm light increases, the amount of 532nm light decreases? This only happens after the diode reaches room temperature...

Hello, I bought this 532nm green laser: https://www.ebay.com/itm/532nm-50mW-Green-Laser-Module-Laser-Diode-light-Free-Driver-LAB-Constant-working/153358894157 It's rated for 532nm at 50mW. When I tested it with this LPM...