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Post-upgrade and completion, it should look something like this: Hence why the optics train is bent around the outer perimeter of the baseplate, instead of taking the more direct route to the galvos. Without the mirror, I'd need to cut a hole in the side of the chassis for the aperture, and...

Think of the upside- cheap DPSS red (maybe even as cheap as 532nm). Traditionally, high powered reds have either been very expensive (for 671nm and 659.5nm DPSS), or had extremely bad beam specs (think 3mRad, and 7x7mm beam diameter at aperture). With a 40% efficiency rate during conversion...

So, it's started now. Yet another nooblet gets a projector build thread. Truth be told, I'd much rather prefer not to be building this projector; I have other things that need money right now. This projector was a result of a rushed decision during a time when it seemed like the best (and...

Well, it's shown running CW (or so you'd think) in the video. Quasi-three-level is hard to get right, but it certainly isn't impossible. The 946nm line of Nd:YAG is a quasi-three-level system, and that accounts for the difficulty in getting lasing (not to mention the competition between it and...

It's three cavities, each lasing at a different wavelength. And yes, a double Z would be a pain to work with, both in terms of alignment and output beam specs. At the very least, though, visible laser emission from a solid state medium that is capable of lasing CW (count ruby out here) is...

Firstly, it isn't very efficient. The very fact that it's got transitions in the visible is an achievement in itself, let alone at a non-poop mode and stable. It's new, and it's certainly not something I've heard about till now. And as it's still experimental, we should expect to see more and...

Hey Ben, Welcome back. Firstly, it's a very dumbed-down guide, as it's to help newbies understand. Hence, it's missing stuff and some other stuff has been over-simplified. But it's a start, and if anyone wants to learn more, there's plenty of resources that pick up where this left off. If I...

The DT25s only have one single discrete amp board, both amps share a PCB. The small PCB is a Die4Drive analog driver. I believe it was for the old blue module, I have no idea what it's doing there. Also, the smallest of the modules is the blue (the last in the optics train). That, or it's a...

Innova 300, by far. Tattoo removal Alexandrite laser, or Coherent 890 Ti:Sapphire?

The Nd:YVO4 for sure (and the doubler too, you said CW 532 :p ) Would you rather have a 1mJ Q-Switched 532nm, or a 1W CW 532nm? (If you don't understand any of the terms used above, please check out the Introduction to DPSS Lasers available in my signature)

Well, don't forget that LBO and BBO needs to be critically phase-matched, as well as requiring exact temperature stabilisation (to a degree) for maximum efficiency (or for any output at all). KTP is 'relatively' flexible when it comes to a SHG medium. Shoot photons at it, and it shoots photons...

The retina does not have pain receptors, therefore it is incapable of feeling 'pain' in the traditional sense. The pain felt when the retina is hit by an extremely high-powered laser is caused by part of the retina bursting (or vapoursing, depending on the power of the laser). What you are...

Did I say I could do the DAC better? No. You know what? I'm not going to even attempt to be civil any longer, I see no reason at all as to why I've been trying to be nice all along. I don't fucking care if you get an FB3. I don't need you to tell me 3000000 times over, repeatedly. There's...

Can you go and buy/download an off-the-shelf solution for them? LFI seems to be the only software that supports the FB3, and it's only a player. You can argue with me tooth-and-nail, including dragging up irrelavent topics and sprinkling it with DMX bashing. Go on, nothing's stopping you. We...

You do realise that none of those other DACs are restricted to a single software platform, right?

Yes, you can argue their hardware is not expensive to build, however even if $500 of the cost was towards software development, it exceeds any other software in features on the market. Don't get me wrong, Spaghetti and many other programs are great, and everyone has to start somewhere (Heck, I...

The FB3 is what, $60 in parts, and people *cough* aXit *cough* (Ahem, sorry for that, I should go get some cough drops for that) hail it as the best thing since sliced bread. The only reason why people buy it is because of the software. You can't get software of that level anywhere else on the...

Nd:YAG output is randomly polarised, Nd:YVO4 output is polarised. Encyclopedia of Laser Physics and Technology - polarization of laser emission, polarized output, birefringence

It all depends on the optics train inside the cavity, and the lenses used. Different modules will have different cavity setups, for example, some modules do not have an expanding lens before the collimating lens. Each design of module and/or cavity will be different. I have seen several green...

The output after SHG is always polarised, without it the SHG process wouldn't work. However, the polarisation orientation may or may not be random. In the case of Nd:YVO4, the output beam is polarised, and this polarisation is rotated 90 degrees after it passes through the SHG crystal. Nd:YAG...