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Anybody else never gotten an efficient diode?

midnighttattoo

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Please keep in mind you are using a three element glass. You will want to go to a G-2 or stock 9mm lens. Based on the power you said it does in your PM it will probably do close to 2.5W with a G-2 or stock 9mm lens using a three element lens is about 25% less power. So that would be 1875mW after the losses from the lens. So your diode is normal efficiency.:beer:
Yeah I love it nice sharp beam .
burns like anything
 



ARG

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I think the first good diode I got was when building the triple-diode laser. Before that all of my diodes were average, or terrible.

You'll get a good one soon :p
 

IsaacT

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Well the MS-SSW I just built does 2.4-2.5W with the Aixiz 3-element lens, so that is fairly efficient right? According to my math that would be a little over 3W with a G2, correct? I am running it at 2.25A.
 

KRNAZNBOY

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All my M140s have done 2-2.2 watts with a G-2, neither bad nor super good.

My 3.8mm 650nm however, puts out only 220mw @ 370ma :(

Edit: I just finished a 9mm build and i think that diode is EXTREMELY efficient. Started to burn the thermal coating off my LPM lol
 
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grainde

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All my M140s have done 2-2.2 watts with a G-2, neither bad nor super good.

My 3.8mm 650nm however, puts out only 220mw @ 370ma :(

Edit: I just finished a 9mm build and i think that diode is EXTREMELY efficient. Started to burn the thermal coating off my LPM lol
What lens are you using and have you tried it with an Acrylic? :beer:
 

IsaacT

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All my M140s have done 2-2.2 watts with a G-2, neither bad nor super good.

My 3.8mm 650nm however, puts out only 220mw @ 370ma :(

Edit: I just finished a 9mm build and i think that diode is EXTREMELY efficient. Started to burn the thermal coating off my LPM lol
What lens are you using and have you tried it with an Acrylic? :beer:

To clarify...grainde is suggesting acrylic with the 3.8mm red build. DO NOT use an acrylic with your 9mm. Would be a very expensive error.
 

IsaacT

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I don't think that those 650nm 3.8mm diodes are meant to be pushed too high. It isn't an LPC, it is a lil more delicate.
 

grainde

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Dont worry mine puts out 250 mW with an acrylic @ 280 mA. I built a second one for someone and that put out 258 mW. So theyre all pretty close. ;) :beer:

Edit : Mine were from lazeerer and he said IIRC 280 or 300 mA max. :thinking: Both the ones I built are still working fine at 280 mA.
 
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IsaacT

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KRNAZNBOY, you may have gone over the efficiency curve by 370mA mark. At which point maybe it has started to lose wattage due to being over driven. I will research.
 

grainde

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@ Wannaburn do you know whether the 650 single modes DTR is selling, are the same ones Lazeerer was selling after the GB? - BTW Lazeerers ones were also IR... :beer:

Edit: Lazeerers were duals and DTR would probably list them as such...So I guess not.

@ KRNAZNBOY did you get the diode from DTR or Lazeerer?

Anyway just in case this is what Lazeerer said about his diodes:

They put out a little over 300mW of 660nm with a 405-G lens at 380mA.

I see at 400mA they stop increasing much.


So THe Currant VS power ration is Different then a LPC-826. In fact its kinda nice because it doesn't require so much currant to get 300mW.

An LPC-826 IIRC needs 530mA to get 300mW


So In Short these Dual WL diodes put out ~300mW at 380mA with a 400mA MAX.

Next to a LPC-826 that puts out 300mW at 530mA.


For the IR Side 300mA gives you 200mW and 350mA give you 240mW. It died at 360mA.
 
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IsaacT

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They look to be the same as the ones Lazeerer was selling, yes. DTR recommends no more than 350mA on these. KRZNABOY, is it possible you sent the current to the 785nm side of the diode? These diodes are dual wavelength depending on what pins you use...

Other than that though, it really doesnt sound too bad. 25mW is not too much to scream defect. Just a slightly less efficient one. But I would recommend dialing back the current if possible.
 
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grainde

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Ah ok then. Updated my post above, with Lazeerers recommendations, just for info. :beer:

Edit: I also built an IR laser using the 760 nm pin. Got 250 mW @ 370 mA :shhh: - I know was taking a risk, but it worked (and still works) fine! ;)
 
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IsaacT

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Oops, I knew I should have given the data sheet a reread. 785 lol. Yeah, it is 760nm. My bad.
 




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