New Video. How low can you go?

[planters]

I am involved with a few projects at this time including a high powered vanadate laser and I've been wondering what will be available to complement this at other wavelengths. I've looked at 532nm pumped dye, praseodymium-fiber pumped by high power 445 diodes and cryogenic operation of direct output diodes. These exotic sources are fascinating, but the cooled diodes combine the benefits of moderate wavelength flexibility, high power and low cost. So, I am beginning to experiment with these and here is a video that covers some of my early progress.

Let me know what you think.

http://youtu.be/z8EuZwgdqQ4

[james]

WOW! That's really COOL!

Have you thought about filling the cryo-chamber with acetone and dry ice?

That would give you much better thermal conductivity to the Aluminum plate.

Could get messy, though....

It might dissolve your adhesives.

[Steve Milani]

Just amazing.
No words left to speak.

[norty303]

Have you thought about sacking the musical director?
Great vid, terrible, distracting soundtrack

Even my missus who was the other side of the sofa asked what the terrible noise from my phone!

[planters]

I knew it...

When I watched the video I was amassed at the distracting soundtrack. It was kind of funny, actually. But, to begin with the "musical director" is a "volunteer". We live at a sort of club med for geeks and there is almost always something cooking. Some new audio amps were being set up upstairs and the old video camera that produced this video, for some reason, amplifies ambient sounds more than the audio in front of the camera, and so what was faintly audible to us comes across like, well...

Anyway, I did not want to repeat the whole thing. But, for the next production I think I will send the sound guys out for ice cream.

[laserdj]

Impressive..

[LaNeK779]

well, everytime we hear sir platers say "Hi" in the begining of his videos, we know we are in for a very interesting ride

and this one had it all, a double teaser on the green beast to come (cavity and diode) plus supercooled diodes

thanks!!

[planters]

Have you thought about filling the cryo-chamber with acetone and dry ice?

Yes. I did think about this. I would probably have used methanol if there turned out to be any problem with the heat transfer out of the aluminum plate, but there seemed to be none. It is also nice that once the cryogen evaporates there is nothing left to deal with.

Incidentally, I let the laser continue to operate @1.9+ W for aprox 2 hours and the consumption of dry ice was VERY small. The quantity you saw me place in the chamber would probably last several times this long and the power output was stable to within 1%.

[edison]

Would be a cool idea. Build a projector that has modules in it with containers to put dry ice in it so you have 2 watt of red just for the show :-)

[james]

Dry ice is very clean. That's for sure!