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My third IR laser build, 1W, 808nm, 1x18650

ReNNo

ReNNo

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I've just finished with my third IR laser build...that is the last diode I had.

It's almost the same as my last build. (UF host, AMC7135 1.4A driver,2x plastic aixiz lenses, 1x18350)
Only difference is that I use 808nm diode and "better" heatsink :)
Status LED is still there :)
Here is my last build... http://laserpointerforums.com/f40/my-another-ir-portable-build-1w-1x18650-51065.html

And here are some pictures from new build..









I tried to solder some SMD capacitors on the diode pins to protect diode from voltage spikes.


But when I tried to power up laser it didn't light up. To make laser working I had to turn on and turn of laser about 10 times very fast and then laser worked. AMC7135 probably has protection of short circuit or something like that and capacitors can have very low resistance when they are not charged. Because of that AMC thinks that out circuit is in short circuit. Because of that I had to desolder all capacitors. But I think that voltage spike won't be problem with only one 18650 battery.

I think I'm done with IR builds for now...
 
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Re: My third IR laser build, 1Wm, 808nm, 1x18650

Now that's awsome - everything that needs to be said is said over MSN :D

You are makin' IRs like there is no tomorrow!

Good job!
 
Re: My third IR laser build, 1Wm, 808nm, 1x18650

Another great build! Pumping those crystal sure is neat, i bet they start to get warm pretty quick under that laser
 
Re: My third IR laser build, 1Wm, 808nm, 1x18650

Byrnz93 said:
Awesome work, love those DIY DPSS green shots!
Click to expand...
Hey ReNNo shoot him over the image of IR/GREEN beamshot, with the big IR laser, remember that?
IR beam visible :D

Also, would be about time to shift your frequency range a bit up the latter, somewhere around 445nm is fine for me! :D :p
 


This one? :D

@Gryphon
Yes, this small crystal warms up very quickly.
 
^^^ Sweet!!!

EDIT: Won't let me do all-caps :(
 
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A very nice looking build! Well done. The 7135 does not tolerate an output capacitor, and as you found, won't start if a cap is present.
 
without this crystall the 808nm diode is 1000mw. with the crystall how mw it will lose???
 
As I told you in youtube comments.
I get about 40-50mW of green light or maybe less.
Cheap crystal is main problem.
 
Hmmm, that explains the case of the non-lasing laser.
I have a 16v X 47uf cap (large spikes) paralleled with a 104 value ceramic cap for the small spikes.
I don't have my videocamera here so I couldn't tell if it was focused.
Apparently I was just sitting in the shop, with my goggles on, fiddling with the focus knob, watching a random spot on the wall like a goof.
.....My girlfriend wonders about me sometimes.
 
Nice.:) we dont see that many IR Builds. That IR Beam Picture is sick.!!!!:gj:
 
lazeerer said:
Nice.:) we dont see that many IR Builds. That IR Beam Picture is sick.!!!!:gj:
Click to expand...
Thread is quite old, ReNNo made some more of great IR builds before. Check out under his profile, threads that the user made. Personally, the 2x 18650 LM317 regulated IR was totally bada$$.
 
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