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Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please Instead of using Nd gain media, use solar pumped iodine MOPA lasers. Fusion power utilized to create fusion power! :crackup:

I don't really have a problem with that kind of thing. I'm all for developing stuff on your own, and I don't really care whether or not they want to tell me what it's for or not. (with the exception of possible malicious intent) The only person he hurts by not revealing information is himself.

Ah. That makes it less of an issue then.

My guess is (if it's even a real question) a highschool or personal project. I highly doubt any professional organization would be using bulk diode lasers for long-range cutting purposes anyway. lasercutter, if by some chance you actually are part of a real organization, in the future don't...

If you're operating the laser in space then it's not going to stay at -100F for very long. I'd honestly be more worried abut the laser getting too hot as opposed to too cold. Since photons refract differently depending on their energy, wavelength shifts caused by going from -100F to 100F will...

Yup, I was just responding to a troll. Probably shouldn't do that, but if I can make him feel bad about wasting his life then maybe he'll do something with it. :)

Do you by any chance have any higher quality images of the resonator scheme and optical schematic?

That doesn't sound suspicious at all. :whistle:

Alum crystals are a 3rd grade science project. Super easy to grow, and with minimal equipment you can make nearly optical quality crystals. I'd love to see someone try to grow laser crystals out of it, but I haven't seen any reference to anything even remotely similar online. However, people...

Link to actual article: Generation of Broadband Mid-IR and UV Light in Gas-Filled Single-Ring Hollow-Core PCF

Yeah, doing it through brute force experimentation is going to be a costly project, though not completely impossible. If you want to take that route then all I can say is good luck. :p The key is to find the perfect ratio between the drive and dephasing. If the crystal is too short, there won't...

It depends largely on the intracavity beam. For example, if laser A and B are equal in power, but laser A has an input intensity of 200MW/cm^2 and a divergence of 10mrad, while laser B has an input intensity of 100MW/cm^2 and a divergence of 5mrad, then laser A will benefit most from a crystal...

The effect of a magnetic field on a superconductor is distinct from its effect on a diamagnetic material, though. Superconductors experience the Meissner effect (as long as the field strength is below the critical value), while normal diamagnetic materials only experience minor magnetic...

Interesting. Is the third video correct in stating that heating modifies the magnetic susceptibility of the material, causing it to move? Or is it due to thermal currents/something else (such as an actual photonic effect)? It can't be radiation pressure, considering that the guy was moving it...

I wish we could find out what happened to Pi... Did he ever give out his last name to anyone or anything else that might be useful?

Well, if you're actually serious about it, heads pop up all the time on places like eBay and BMI. Hell, I just picked up an old SP375 for $50 with pristine optics and a nice sapphire nozzle. Nobody wants the things anymore. Circulators may be a bit more difficult to get ahold of, but if you...

CW dye... The holy grail for WL collectors. :whistle:

Don't you guys remember what happened last time we played around with the rep system? Lots of other forums experience rep inflation too. It's typically just dealt with by, as diachi suggested, raising the rep/bar ratio. I don't care about rep at all personally, and would be fine if were...

Any updates?

Have you actually measured the power? Chances are it's nowhere near 5W.