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Looking for 520-525 1-1.5W Lowest divergence w/o correction

Nordhavn

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Oct 12, 2007
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Any 1W Guardian owners here (520nm)? Hows the divergence with a simple collimator? (G2, G7, etc.)
I'm trying to get something that's not as bad as MM 445 diodes.
I'd love to have something like my 100mW 405. Simple GRIN lens and I'm under .5mRad!
 

Alex2893

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Jun 6, 2014
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There is no greens over 1w with that low if divergence. Your best bet is the plp520-b1. It's around 200mw and the divergence in my testing is under .5 mrad. The divergence of a 1w 520nm is about the same as a m140 445nm diode. Also your 405 is a single mode so you can't expect great divergence with multimode diodes which all the 1w or higher 520nm are.
 

trinh hong phuoc

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May 12, 2017
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PM me if you want 100-200mw 520nm 0.5mrad
1w-1w4 520nm is 2mrad-it can reach 0,5mrad when use 2x otp pair lens
I also think 1w 520nm is great beam when you use g7 or 3 element lens,it is so bad beam when you use g2 lens
 

CurtisOliver

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Jun 12, 2015
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Unfortunately you will only achieve divergence that low with these multimode diodes if you use beam correction, or if you use a beam expander. The G7 is a good lens. But there has been discussion about a new lens from DTR (Jordan) which he is calling the G3. Tests are still being conducted so I don't know if there is any radical difference with the 520's yet.
 

paul1598419

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Sep 20, 2013
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I tested the G3 with my NDG7475 1100 mW laser. It has splash in a circle around the beam's profile about 2 feel in diameter at 15 feet. I like his two element 520nm AR coated lens for this diode as it has no artifacts and gives a nice clean beam profile at a loss of only 15% over a G2.
 




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