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Old 04-15-2011, 07:11 PM #1
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Question portable 808nm 1 watt laser build help

Hi i have a 9mm 808nm 1 watt diode. I'm bit of a noob to building lasers iv built a few from kits where all u had to do was buy the kit and the diode and put it together I have seen lots of portable 808nm 1 watt lasers but after weeks and weeks of research I haven't been able to find a build sheet or a list of parts to build one if any one knows of anything or can help I'd much appreciate it.


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Old 04-15-2011, 07:16 PM #2
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Default Re: portable 808nm 1 watt laser build help

You'll need a driver that can put out around 1A of current (I think) which shouldn't be too hard to find considering most of the drivers used for the 445nm's now put out around that current.

You'll also need a suitable 9mm heatsink/module to focus it, I beleive meridith (something like that) do 9mm modules with focus lens in, you'll then need a heatsink to put this module in and keep it cool, preferably one that fits your host of choice, I'd contact Jayrob or Ehgemus about machining up a custom host for you or a custom heatsink for a pre built flashlight host.

Now before you do all of this, the beam quality will be shocking with a very large divergance and a rectangle dot shape not round unless you go to a lot of time and effort using special optics to improve it.

And WHY? There is no reason to build a 1W IR laser unless you have a lot of experience with lasers because the light they put out is next to invisible and is EXTREMELY dangerous if it hits your eyes, especially as it only looks like a dim light it can be VERY decieving.

I suggest you don't touch the diode until you've done a few lower powered builds and read on the forum more about Laser Safety etc. If you doing it becasue it's cheap, your in the wrong hobby.
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Old 04-15-2011, 07:26 PM #3
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Default Re: portable 808nm 1 watt laser build help

Actually, these 1W diodes need around 1.3A of current. They are low voltage and need a higher current..

You probably will need a 9mm module (I've only saw 9mm 1W 808nm diodes) and a custom heatsink. Just beware; you cannot focus the diode very well with common collimators - commonly their divergence are 10/100 on the fast axis.
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Old 04-15-2011, 07:31 PM #4
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Default Re: portable 808nm 1 watt laser build help

Thanks for the info.I got goggles from O-like Protective Wavelength 200-450,800-2000nm
Suitable for 405nm,808nm,780nm,980nm,1064nm laser protect.I have built a 445nm 1 watt laser i was told that the module in it wouldn't work with the 808nm.
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Old 04-15-2011, 11:10 PM #5
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Default Re: portable 808nm 1 watt laser build help

808nm isn't very practical, why a 808nm portable if you have a 445nm?
Anyway, if you know the current requirements just get the right driver (won't the that hard) and get a suitable host, which is more difficult for a 9mm diode.

EDIT: post 808
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Old 04-15-2011, 11:16 PM #6
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Default Re: portable 808nm 1 watt laser build help

As Asherz pointed out, the beam isnt going to be that great.. You
have to incorporate an expander if you want a decent beam..

To do this the easy way you need to start with something like the FAC
found in some China 5mW greenie pens.

Using a glass 660nm collimator after that will clean up the beam quite
well, but will take some ingenuity as there are no readily available mounts
like this for sale..

Using it for up close burning will work fine with a standard collimator, just
dont use any plastic lenses, or you will foul the LD with smoke..
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Old 04-16-2011, 10:39 AM #7
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Default Re: portable 808nm 1 watt laser build help

I seriously doubt cheap pointers have a fac, usually they just put the diode close enough to the crystals. But a fac would work, I think a prism pair or a set of cylindrcal lenses would also compensate the asymetrical beam.
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Old 04-16-2011, 02:51 PM #8
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Default Re: portable 808nm 1 watt laser build help

Quote:
Originally Posted by Bluefan View Post
I seriously doubt cheap pointers have a fac, usually they just put the diode close enough to the crystals. But a fac would work, I think a prism pair or a set of cylindrcal lenses would also compensate the asymetrical beam.

If you can get a hold of the newish type that have the APC
circuit or even the leadlight series..

Mind you I havent ripped apart any greens for some time, some
may have these parts kicking around..
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Old 04-16-2011, 02:57 PM #9
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Default Re: portable 808nm 1 watt laser build help

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Originally Posted by Bluefan View Post
808nm isn't very practical, why a 808nm portable if you have a 445nm?
Reason for an 808nm is i have some usefulness needs for a burning laser but need the beam to be as non visible as possible And since i already have an 808nm IF 1 watt diode just laying around i figured time to put it to use.
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Old 04-16-2011, 03:10 PM #10
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Default Re: portable 808nm 1 watt laser build help

What are you trying to do? Cut the string in a barber cut lite game.
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Old 04-16-2011, 11:35 PM #11
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Default Re: portable 808nm 1 watt laser build help

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Originally Posted by NetGod3Com View Post
What are you trying to do? Cut the string in a barber cut lite game.
lol no i got a few more tricks up my sleeve then cheating at a game
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