Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

How to Register on LPF | LPF Donations

portable 808nm 1 watt laser build help

B

BlazingLasers

0
Joined
Apr 15, 2011
Messages
4
Points
0
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.
 





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.
 
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.
 
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.
 
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
 
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..
 
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.
 
Bluefan said:
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.
Click to expand...


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..
 
Bluefan said:
808nm isn't very practical, why a 808nm portable if you have a 445nm?
Click to expand...

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.
 
You must log in or register to reply here.


Back
Top