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FrozenGate by Avery

A-140 vs. M-140 vs. H1600

So what is the deal with the M vs H? Has anyone proven them to be different or a better bin on the same diode?
 





They are the same diodes but I think the H are binned higher.
 
I am not so sure that these are even binned.... I mean, that would be a HUGELY daunting task. There are millions produced... and individually testing each one? Or maybe not. Still, testing each batch would be very difficult.
 
The manufacturer test every laser diode before it leaves the plant. Why not add a light sensor to measure the output. It can be done automatically.
 
Are we sure every diode is tested? I feel like it wouldn't be required for such an efficient process.
 
Wolfman29 said:
Are we sure every diode is tested? I feel like it wouldn't be required for such an efficient process.
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Yes. Every single diode is tested individually. Likely multiple times.

After cleaving the facets, after dicing/device singulation, and after packaging are 3 very likely times for every single device to be tested. At a bare minimum, every single one is tested and binned before shipping to the consumer.

It's the same in all semiconductor manufacturing. They test on-wafer, they test after dicing, and they test after packaging. Why spend the money to package a device that doesn't even work?
 
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Yep I remember reading on the PhlatLight manafacturer website. One of their spec sheets showed all the different bin levels the LED's could be purchased @. There were ones for wavelength and lumen. Like 10 different binning options. This led me to believe that binning is a very common practice in the LED and LD industry.:beer:
 
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Hmmm, so it's possible then, that the H1600 could be a more efficient bin of the same diode? It would match up with the numbers.
 
ARGLaser said:
Hmmm, so it's possible then, that the H1600 could be a more efficient bin of the same diode? It would match up with the numbers.
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The >2W @ 1.62A in my sig came out of an H series projector... anecdotal for sure - but that is an efficient diode! And I've got 3 or 4 :thinking: more!
 
The H diode I have is doing 2.168W at 1.8A with a G1 lens.

So I'd say the H series is a crap shoot as much as the M series are.
 
Tech_Junkie said:
The H diode I have is doing 2.168W at 1.8A with a G1 lens.

So I'd say the H series is a crap shoot as much as the M series are.
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Interesting. I finally got mine measured at 2.15W with G1 at 1.62A. Those are both still very good though.
 
Tech_Junkie said:
The H diode I have is doing 2.168W at 1.8A with a G1 lens.

So I'd say the H series is a crap shoot as much as the M series are.
Click to expand...

I agree. By comparison, I have a late model A140v diode that is doing 2.3 watts with a G2 lens at only 1.44amps. Binning department was sleeping on that one - :thinking:
 
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I remember reading about how huge efficiency gains were reported by using a very difficult to achieve crystal of GaN as substrate. Something to do with how it is hard to get it to crystallize homogeneously along that plane, and how substrates for C-plane GaN are ridiculously small and expensive.

PBD: How can you tell that these are not from Nichia? Have you gotten to see the Nichia diode of similar specs under the scope?

On a side note, I just got a nice Nichia LED. Thought this would be my second Nichia optoelectronic device, but I guess it will be my first.
 
For the sake of saving time to others browsing through pages, I believe the OP should be edited and have the data gathered by the testers added to give a definitive "conclusion" to the subject.
The past few pages are mostly off-topic anyway.
 
The answer is the M and H series diodes are much more efficient than the A series diodes. They have an extra bond wire and a larger die. Most all M and H diodes can hit 2W+ with a single element lens and 1.8A current.;)
 
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