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Start out with a Nitrogen TEA gas laser. Get the goggles first, as 337nm is going to leave scars on your eyeball if it hits you. Then move on to pure nitrogen transverse excitation types, carbon dioxide and helium-neon. Look up Venturi pumps to save a bit of money at this point. Then move on to...

7W is used in a commercial laser soldering gun a former colleague liked to show off. The wavelength was in roughly the same range. I have seen adverts for a 9W commercial system intended for CNC controlled assembly. However, I am not sure about whether the solder used was mixed with anything...

Thermal effects kill the diode, as evidenced by the time scale. I am not a physicist, but it seems likely to me that you are blowing the junction apart. You are effectively sending a thermal gradient shock wave through the lattice. At and near the surface of the wavefront, the distribution of...

Another point is that if you separate the beampath of the green from the beampath of the IR with a prism or the like, then you can use a HR mirror without the green transmission for the IR and mixed beampaths, and leave the green beampath as-is. Alternately, the green beampath can encounter a...

Something on tips and tricks would be good. For instance, for the DPSS bits, alignment is critical. A trick I read about in a paper on gas lasers, is to sandwich an optic between two metal discs with holes in them, using an O-ring of silicone rubber between the optic and metal. A set of three...

I hate to be a spoilsport, but this is beyond you. Dangerously so, as evidenced by even needing to ask about eye protection. When making a laser soldering pen, the ideal output range is about 7W or so, and using eye protection is mandatory for everyone in the room. The room should be locked...

To make a 473nm DPSS laser, you can get the pieces from a seller on e-bay. For a slightly more advanced version, you want an Nd:YAG rod with a pair of 20-40W CW diodes to pump it, a HR946/HR473/HT1064 plano mirror, a HR946/HR473/HT1064 concave mirror, a HR946/HT473 concave mirror, a collimating...

Building one would be a major feat, I think. Really, making any kind of maser is expensive and difficult. A ready made hydrogen maser unit will sell for a quarter million or so. As far as I know, there is only one person that owns his own hydrogen maser (actually, five of them), in the form of...

I'll take one that fits a diode directly, with threads for a lens nut in front, preferrably a cube 20mm to a side. The diode must be seated with a threaded retainer, as I will be switching diodes in this one rather often, yet still need good thermal contact for good TEC regulation. Any chance...

Re: FS: 405-G-1 Glass Lens Mod-28% Increase vs AixiZ!! Any idea about the temperature? If it's in the <250C range, I can just set the controller to that. Above 250C, it's on to the stove or the torch, and I'm guessing one does not sub for the other. ;) Sounds like an improvement over xylene...

DIY nitrogen lasers are interesting. Have you thought about using subdermal needles or a long stack of razor blades for the electrode design? Sharp tips give a more even discharge profile, the way I understand it. If a few people were to do a group buy of suitable mirrors, the discharge could...

405nm will actually kill MRSA in vivo, but it does not penetrate deeply enough to get to a colony that is located more than 0.1mm or so into the skin, less for pigmented skin. A 470nm laser will go further in, and thus be more useful. However, you can use 405nm to clean out a superficial...

Re: FS: 405-G-1 Glass Lens Mod-28% Increase vs AixiZ!! Those retaining rings are indeed annoying. I wasn't aware they had started gluing them, so I mangled two, despite using the right tool for the job (I thought, until I realized they were glued now). I use the lens nuts and collimator heads...

I didn't start the thread jack, but I may as well finish it... Japan went further than Germany by a ridiculously wide margin, and neither can stand up to the creativity of historical figures that are widely revered today, at least in terms of actual cruelty. For the most part, Germany was...

405nm is in the maximum absorption range of a ruby rod, that's not the problem. The problem is that ruby absorbs the same wavelength it emits, so whatever parts of the ruby are not being pumped hard enough will be removing power from the beam. To top it off, most ruby rods have high doping...

I have a ruby rod and it does indeed look great with a 405nm laser to excite it. The fluorescence is deep red. I believe that is what they call "pigeon blood" when it is the natural color of the rock, but gemstones aren't my thing, so I could be wrong. Actually causing it to lase will require...

Re: 405nm AR glass lenses - fit AixiZ &nbsp;FEELER Now for someone to do a GB for 405nm gradient index lenses... Anyone even know who would make that sort of thing?

GooeyGus, When you say it cuts glass, is that with FAC only, or is that with good focusing? And, by cuts glass, do you mean to say that glass is machinable with it? If so, does it take the full 40W, or could I yank the 20W from the DPSS for this use, and let the 40W handle the DPSS instead...

Something like that. It's a variable phase retarder. If you know how to use one, it's pretty cool. Regular LCD panels unfortunately lack the driver logic and drive current to make good variable phase retarders, but I figure you can probably overdrive the colon in a stock 00:00 type LCD display...

A simple 500 lines/mm grating will cost you $9 for a 6" by 12" sheet. Cut two squares out of it, and align them perpendicularly to each other. Mount in a frame. Shine the laser through them with a paper at 1ft/1m distance, then at 2ft/2m distance, measure and calculate the angle of each beam...