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FrozenGate by Avery

1.5 W green handheld laser?

I

ixfd64

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This video shows what is supposedly a 1.5 W green laser popping a row of 190 (!) balloons. According to the description, the laser was built from a 800 mW Lasever module, yet the author measured the output at 1,500 mW.

However, it's rare for a green handheld laser to exceed 1 W in output, let alone 1.5 W. Is it possible that a large percentage of the output is actually IR?
 





That's the sort of host I'd expect from a cheap Chinese (likely underspec) laser.

I don't think it would have more than a 500mW output at 532nm, unless it was very expensive.

If it does reach 1.5W, I expect that you are correct - most of it is IR.

Trevor
 
the owner of that laser is the member known here as numquamretro

it was indeed a very overspec lasever 800mW module. at that time, it was in a firedragon host, it isn't anymore.

lasever modules are good quality, but I wouldn't count on getting one that nice. the module alone is pretty pricey, and last I checked, they only had up to 700mW in stock, no 800mW modules, though that may have changed
 
For what it's worth, green DPSS lasers can theoretically convert 808 nm to 532 nm light at up to 48% efficiency (60% for Nd:YVO4 times 80% for KTP) in perfect conditions. However, it would be extremely difficult for a laser to sustain such conditions. It's probably also possible to overdrive the pump diode to 3 W or so, but I imagine such a laser would not last long.

If there was another company that could make a true 1.5 W green portable laser, then it's probably Laserglow or Jetlasers.
 
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I'd consider 25% 808nm -> 532nm to be ridiculously good for a Chinese handheld. :p

Trevor
 
Its actually my laser and i am on the way to get a new copper host for it (see another thread here).
I have also ordered further IR glasses for some more tests. But since i mounted the IR glas shipped with the module, i consider it has not much IR leakage. My new host is in manufacturing status and i hope i can do some more tests in the next few weeks.
 
oh...and another thing: IR wont pop the balloons at that distance (30 yards) because of the differgence at IR wavelenght.
 
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ixfd64 said:
then it's probably Laserglow or Jetlasers.
Click to expand...

Nope. Laserglow don't "make" lasers. They Quality Check CNI lasers.

I'd think that achieving 1.5W green would need a >6W pump, right? locked at 808nm, and maybe a peltier for cooling.


numquamretro said:
oh...and another thing: IR wont pop the balloons at that distance (30 yards) because of the differgence at IR wavelenght.
Click to expand...
Yeah? Are you saying the IR will have a different collimation than the 532nm light?
Yeah thats with chinese modules. I were thinking that too.

BUT look at this. A quality laser non-IR filtered (credits to KapHn8d)

1qxs.jpg


I wouldn't say that @ 30 yards the IR would not be collimated. It could be very well collaborating for popping the baloons. :beer:
 
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I read somewhere that the collimation for IR is not the same as the collimation for green due to the distances associated with green light output and IR light output from the collimating lens, so the IR shouldn't be as highly collimated as the green is. Although, I may be wrong :p
 
I recently saw 1W of 532 in person, and honestly, it was insane. An extra 500mW will do almost nothing to the visibility unless you compare side by side, and even then, you probably won't see it.

First time I saw green burn, melted a hole in my subwoofer..
 
okay... i should have said it a little more precise: IR will not pop balloons that easy at this distance. at least as far as i know IR can not be focused as easy as a green one. but anyways... i´ve put an IR glass infront of my laser in addition before and it had almost no losses. it still was over 1,4w. i did an extra order with two more IR glasses of good quality. then i hope all doubts will be gone :beer:

if you read my other thread, i showed before that the power consumption is 4,5A at 3,2V wich equals almost 15W. So a 6W pump is not impossible imho.

Leodahsan said:
Nope. Laserglow don't "make" lasers. They Quality Check CNI lasers.

I'd think that achieving 1.5W green would need a >6W pump, right? locked at 808nm, and maybe a peltier for cooling.



Yeah? Are you saying the IR will have a different collimation than the 532nm light?
Yeah thats with chinese modules. I were thinking that too.


I wouldn't say that @ 30 yards the IR would not be collimated. It could be very well collaborating for popping the baloons. :beer:
Click to expand...
 
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I just asked the uploader of the video about this, and this was his reply:
yes it has a built in IR filter. I did tests with an additional IR filter and the power was still over 1,4W. So almost no IR leakage.
Click to expand...
So looks like it's a damn powerful piece of kit!
 
you should definately read the posts before... and maybe you should compare my username with the youtube channel name ;)
 
It's not the power of the laser that should be discussed here. Some of the 445's I've tested out before mounting them in laser projectors, mainly the Osrams with simple glass elements have scary burn capability up to dozens of feet at around ~1 watt.

The optics and collimation here are what's impressing me. That's about what, 150feet? That's a pretty tight beam, even from a 532 at that range. I have some commercial Q-beams sitting around that aren't anywhere near that tight.

I just want to know what he's using for glass.
 
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