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FrozenGate by Avery

Sky Blue MiniLASE OEM modules






Thanks for the link, took a screen shot of this page:

Screen%20Shot%202017-04-03%20at%209.53.15%20AM.png
 
Those VIS 405-520 beam divergence specifications are uber low, whether they are using the full or half beam width calcs.
 
Alaskan said:
Those VIS 405-520 beam divergence specifications are uber low, whether they are using the full or half beam width calcs.
Click to expand...

I've tried to find some info OEM module prices whitout luck. Price might be uber high..


Does anybody here on LPF have suggestion for low divergence diode?

I have found location where I can do 20km pointing / "experiment" in very safely way.
I'm looking diode for doing that.

I know that almost any of single modes will do, but I would like to have best I can get for reasonable price.


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EDIT

Collimated 520nm MiniLASE module with 4mm beam profile would be 1,3 meters at 20km distance without any beam expander.. :thinking:
 
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I believe you are right on the price of these diodes in their modules. They claim an M2 value of less than 1.3, which is still Gaussian. Not at all bad for a diode based laser.
 
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The smaller the emitter, the lower the resulting divergence. Single mode diodes have small emitters, but unfortunately, that also limits the power they produce.

I've been wanting to crunch some numbers for awhile now to make a graph comparing the power density produced from both diode types over a range of distance showing how much more power is delivered at great distances by a far lower power single mode diodes. Using this online calculator, the difference is amazing:

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator
 
That looks uber nice and I am sure, $$$. On that target you zoomed to, are you going to use your single mode laser and put a spot on it later? If you do, a pic would be great :)
 
Alaskan said:
On that target you zoomed to, are you going to use your single mode laser and put a spot on it later? If you do, a pic would be great :)
Click to expand...

See post 5. Check one of his other thread(s). In that one he does long range spotting with photos.
 
I see that Sollinger, who sells the Razor, 532nm 5 watt laser claims the lowest M2 in the industry. They don't give the value, however. This value is directly related to the laser's divergence and the 0.25 mrad they claim for this laser seems very good, indeed. I would have to recheck the math involved to see if it can be gleaned from their divergence claims. If you could afford this laser, I'm sure it would give you the great beam specs you are looking for, AD. I fear it will be quite expensive, though. If combined with a beam expander, it would give an even smaller spot at 20 km.
 
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