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337.1 nm Build *updated*

MrMcChicken

MrMcChicken

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Hi all, I've build a 337,1 nm laser. It's a "TEA laser"
I think it is the most easiest Laser to build, and the cheapest one.

The power supply have to be a high voltage power supply, at least 5kV.
I am using my zero voltage switching flyback driver. The voltage ist about 7kV. It isn't build well enough to surviver more than 7kV ^^.

The laser itself is build out of aluminium foil, plastic foil, edged aluminium rails and easiest acrylic glass. I am using lead for a better connection of the electrodes.

All in all it maybe cost me about 15€.
9€: for the flyback driver
6€: for the laser materials.

The input is about 200W.
The output is quite small. Maybe 0,1 up to 1mW for about 0,7 seconds


UPDATE: Because you can't see the laser in action well on the video, i've uploadet just two pics ;)
1g572w.jpg

2h5pldx.jpg
 
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532 with Envy

532 with Envy

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Re: 337.1 nm Build

Congratulations on your TEA build! It's great to actually "Make" one's own laser.

Can't seem to see the video or pictures that you were trying to post......looking forward though.:beer:
 
MrMcChicken

MrMcChicken

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Re: 337.1 nm Build

Thanks, yeah it's my first one ^^.
Now you should be able to look the video i've posted.
I was a bit in troubble with youtube ;)
 
yobresal

yobresal

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Re: 337.1 nm Build

Is the spot visible on objects in which it doesn't flouresce?
 
MrMcChicken

MrMcChicken

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Re: 337.1 nm Build

Yes it is. For example white paper or wood. But not very well. I used in the video this color to make it better visible.
 
Gryphon

Gryphon

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Re: 337.1 nm Build

These lasers facinate me, would it be possible to replace the flyback and driver with say, a stun gun? It would still provide multiple HV arcs is rapid succession, unless theres more to these lasers than i know.
 
jimdt7

jimdt7

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Re: 337.1 nm Build

Pretty interesting :gj:
+1 :beer:

Jim
 
MrMcChicken

MrMcChicken

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Re: 337.1 nm Build

Thanks :)

I'm not shure if you could replace the flyback with a stun gun. The stun gun puts out pulses, so I don't know if the capacitors load up.
Edit: if you would directly connect the stun gun to the rails, the inductance would be much to high.
 
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Gryphon

Gryphon

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Re: 337.1 nm Build

I got a couple dozen 15kV caps left over from an old Marx generator i once put together, do you think putting a couple of those in parallel with the rails might help.
 
Seoul_lasers

Seoul_lasers

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Re: 337.1 nm Build

Gryphon said:
These lasers facinate me, would it be possible to replace the flyback and driver with say, a stun gun? It would still provide multiple HV arcs is rapid succession, unless theres more to these lasers than i know.
Click to expand...

Yes, done that. It works quite well... however you need close the gap. Lower current.
 
Hiemal

Hiemal

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Wish there was a way to do away with the spark gaps... I hate the noise level. :/
 
Sigurthr

Sigurthr

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What are you using for your capacitive insulator? Kitchen plastic wrap, or something more?

If I can find a cheap NST and some aluminum angle I may build one finally...
 
Seoul_lasers

Seoul_lasers

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Le Quack said:
Wish there was a way to do away with the spark gaps... I hate the noise level. :/
Click to expand...

Actually there is a way of taking out the spark gaps, however it used
SIDAC's. They are being used by high end Tesla coilers, though it's a much more complex set up.

Link here. Have a look.

Solid State

900V per string.

This would eliminate the noise factor some what.

The other way of "cheaply" decreasing the noise would be to encase the spark gap in a pipe.
It works well too. The shockwave created by the gap would be essentially contained. I'd also think about running a fan to blow the O3 and Nitrogen Oxides out of the spark gap. Otherwise you'll start seeing severe oxidation of your gap. 3/4" WoZr cutting rods are well worth getting for the trigger gap.
 
MrMcChicken

MrMcChicken

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Sigurthr said:
What are you using for your capacitive insulator? Kitchen plastic wrap, or something more?

If I can find a cheap NST and some aluminum angle I may build one finally...
Click to expand...

I am not shure about the name of this foil, but it is used for overhead projectors.
It is sized like a normal sheet of paper, so it is optimal for a TEA laser. I hope you understand what I mean. Kitchen plastic wrap will be to thin. I am using two layers of foil.
It is important to weight everything well, or it won't work. The thick plastic plates of the laser itself does their job really well couse the are heavy.

A NST would be an excellent power supply. My zvs is a bit to strong. In my case the output would be quite better if the input wouldn't be so high ^^
 
Seoul_lasers

Seoul_lasers

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ZVS has nowhere near the power output (unless your running 1.5KW "BIG MOSFETS") compared to that of an NST. In terms of Voltage, I'd be running 35Kvdc maximum.
As for your capacitors, I'd be looking into building an MMC array. MultiMini capacitor bank.
A bank of 22 x CDI 1600VDC 350nF capacitors will do nicely for a laser N2 laser.
 
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