Old 08-20-2011, 05:52 PM #1
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Default How to burn a "burn" with a YAG laser

The laser is a KW-range 1060 nm pulsed YAG laser "gun" from AnselmoFanZero... the case with the lock is because this is a dangerous Class IV laser and is not a toy

Other safety precautions: the laser is used in a room with no windows (to prevent damage to the outside) and everyone should always wear safety goggles with OD> 7.





the movies show the effect of pulsed laser on a tin can of "burn"









To prove that there are holes with a small flashlight





... and with a 150 mW green laser



Attached Thumbnails
How to burn a "burn" with a YAG laser-case0.jpg   How to burn a "burn" with a YAG laser-case2.jpg   How to burn a "burn" with a YAG laser-flash.jpg   How to burn a "burn" with a YAG laser-macrob.jpg   How to burn a "burn" with a YAG laser-greenb.jpg  

How to burn a "burn" with a YAG laser-buchi.jpg   How to burn a "burn" with a YAG laser-greenh.jpg   How to burn a "burn" with a YAG laser-beam.jpg  


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Old 08-20-2011, 06:09 PM #2
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Default Re: How to burn a "burn" with a YAG laser

My 445 is a class IV laser, and is very dangerous. THAT is a weapon!
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Old 08-20-2011, 06:24 PM #3
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Default Re: How to burn a "burn" with a YAG laser

Quote:
Originally Posted by jakeGT View Post
My 445 is a class IV laser, and is very dangerous. THAT is a weapon!
Maybe call it a weapon is exaggerated, however I use it in a room with no windows and safety goggles with OD>7. Each class IV laser is very dangerous ... blindness is blindness IMO
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Old 08-20-2011, 07:38 PM #4
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Default Re: How to burn a "burn" with a YAG laser

I always thought it would be cool to try and devise some kind of additional optics beyond the OC on those SSY-1s. The idea of being able to concentrate the beam, at range, is very appealing!
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Old 08-20-2011, 07:55 PM #5
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Default Re: How to burn a "burn" with a YAG laser

Finally
Showing off is not a shame when you are the owner of this thing.

Still miss her
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Old 08-20-2011, 10:17 PM #6
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Default Re: How to burn a "burn" with a YAG laser

Good grief! I *need* one of those. (If I say it enough, it must be true! )
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Old 08-20-2011, 10:20 PM #7
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Default Re: How to burn a "burn" with a YAG laser

No one NEEDS stuff like that....but its damn funny to play with dangerous stuff...

BTW: I like the case fed! Like it alot. You made her a nice home :'(
Guess she forgot me already.
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Old 08-20-2011, 11:22 PM #8
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Default Re: How to burn a "burn" with a YAG laser

Quote:
Originally Posted by AnselmoFanZero View Post
...I like the case fed! Like it alot. You made her a nice home :'(
Guess she forgot me already.
Thanks was too dangerous to leave unattended a tool like that, even without batteries... BTW I put in a small case like this even the 445 engraver
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Old 08-20-2011, 11:29 PM #9
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Default Re: How to burn a "burn" with a YAG laser

Cool. I need a few of those...
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Old 08-21-2011, 03:22 AM #10
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Default Re: How to burn a "burn" with a YAG laser

Little too dangerous for my taste. Other than that, looks awesome.
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Old 08-21-2011, 04:00 AM #11
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Default Re: How to burn a "burn" with a YAG laser

Sillllly question from the resident idiot

So um..if you can get 10kW from a 200nano second pulse...whats the limiting factor for doubling that pulse width to 400NS or even 800...or 1,000 NS (lets just focus on that question while I ramble on in my drunken vodka stupor)

. ...if you have the capaciter /battery capability to get the power output for 50 + firings.....what is the big deal with dumping more capaciter/battery energy for a longer pulse...

If you cant..can you increase the capaciters size?...or the electrical "bandwidth" to drain the necessary juices.

Does it even use a capaciter bank??

That might be the way to go ..im sure the builder knows all this though. but if you simply cannot drain the battery juice quickly enough ...a larger host with a bigger bank of capaciters might be the way to go. They can trickle charge off the batteries and output a lot of current at once...and you have SEEN the amount of energy those home made rail guns can produce off a moderate capaciter bank..exceeding a .22 LR round.

Is it not possible to dump that much current into a lasing medium and get that amount of energy? it should be a much more efficient energy conversion to go from electrical to optical vs electrical to electromagnetic to Kinetic...


Or maybe the limiting factor is the pumping source??? is it a flash tube? can a flash be sustained for a longer duration? perhaps multiple tubes, offset for a cumulative effect doubling the duration at the same power level?


If there are "bits and pieces" of knowledge and principles I can find elsewhere that would make this apparent please suggest the topics I should research.

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Old 08-21-2011, 07:51 AM #12
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Exclamation Re: How to burn a "burn" with a YAG laser

Quote:
Originally Posted by ChukiDori View Post
Sillllly question from the resident idiot

So um..if you can get 10kW from a 200nano second pulse...whats the limiting factor for doubling that pulse width to 400NS or even 800...or 1,000 NS (lets just focus on that question while I ramble on in my drunken vodka stupor)

. ...if you have the capaciter /battery capability to get the power output for 50 + firings.....what is the big deal with dumping more capaciter/battery energy for a longer pulse...

If you cant..can you increase the capaciters size?...or the electrical "bandwidth" to drain the necessary juices.

Does it even use a capaciter bank??

That might be the way to go ..im sure the builder knows all this though. but if you simply cannot drain the battery juice quickly enough ...a larger host with a bigger bank of capaciters might be the way to go. They can trickle charge off the batteries and output a lot of current at once...and you have SEEN the amount of energy those home made rail guns can produce off a moderate capaciter bank..exceeding a .22 LR round.

Is it not possible to dump that much current into a lasing medium and get that amount of energy? it should be a much more efficient energy conversion to go from electrical to optical vs electrical to electromagnetic to Kinetic...


Or maybe the limiting factor is the pumping source??? is it a flash tube? can a flash be sustained for a longer duration? perhaps multiple tubes, offset for a cumulative effect doubling the duration at the same power level?


If there are "bits and pieces" of knowledge and principles I can find elsewhere that would make this apparent please suggest the topics I should research.

Capacitors store energy and then release it, and in the case of flash capacitors are designed to store a charge of several 100Vs at high current for fractions of a second.
Camera flashes do this all the time.
The limiting factor for a ruby laser power is a combination of flash tube, energy supply to charge the capacitors, the capacitor size and the lazing medium.
When you make one of these laser rifles your are essentially using a laser that was meant as a M-60 laser range finder for a tank. It wasn't really meant to be used to burn things, though when you focus this much energy to a pin point you get holes in even metal and even air ionization!! . NO diode laser I am aware of can even approach air ionization as the power density is far lower in the beam. 10s of mW-100s of W diode vs 10s of KW - +1TW of power.

A ruby/YAG laser can run somewhat continuously but without massive cooling for tubes and rods will overheat and crack/melt.
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Old 08-21-2011, 09:28 AM #13
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Default Re: How to burn a "burn" with a YAG laser

1W blue lasers are damn expensive as well.....100mW green....you name it.
Please dont start a "how much more dangerous is it" discussion again.
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Old 08-21-2011, 02:41 PM #14
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Default Re: How to burn a "burn" with a YAG laser

Quote:
Originally Posted by ChukiDori View Post
what is the big deal with dumping more capaciter/battery energy for a longer pulse...
Instead of the pulse getting longer, it ends up getting split into two consecutive pulses. But there are several limiting factors - many are heat related.
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Old 08-21-2011, 02:45 PM #15
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Default Re: How to burn a "burn" with a YAG laser

Why not running a 445 on 5Amps? Should give 5W.

*Sarcasm sign*
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Old 08-22-2011, 10:49 PM #16
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Default Re: How to burn a "burn" with a YAG laser

[sarcasm]I plugged a 445 in the wall outlet, but it didn't give the light I was looking for...[/sarcasm]
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