A-140 vs. M-140 vs. H1600

DTR · Mar 12, 2012

Wolfman29 said:
So if they simply are serial numbers, then I would assume that ones that have similar serial numbers would be made from the same set, so we could probably expect similar results/efficiencies from similarly coded serial numbers?

The reason I say that is that, considering many diodes are made in each set, the number of impurities/etc. is probably about equal on a relative scale for diodes of the same batch as compared to previous or later batches.

I would think it would not be a very efficient process to build them, bin them and then go back and stamp them with a serial number. More likely the serial numbers will just give us a production timeline not a bin level.:beer:

Wolfman29 · Mar 12, 2012

Well, yeah, except I would think that similarly produced diodes (diodes from the same production batch) would have similar characteristics.

DTR · Mar 12, 2012

Wolfman29 said:
Well, yeah, except I would think that similarly produced diodes (diodes from the same production batch) would have similar characteristics.

If that were true would we not see a more consistent efficiency from diode to diode in the same array?

Wolfman29 · Mar 12, 2012

Not necessarily - I wouldn't think that the diodes from the same production batches would necessarily end up in the same projector. They may be binned and then sorted, so that you have weaker ones on the outside, etc.

DTR · Mar 12, 2012

Wolfman29 said:
Not necessarily - I wouldn't think that the diodes from the same production batches would necessarily end up in the same projector. They may be binned and then sorted, so that you have weaker ones on the outside, etc.

From my experience placement in the array and bin level are are not correlated. I have seen high efficiency and low efficiency ones come from all over the place in the arrays.

Tech_Junkie · Mar 13, 2012

jayrob said:
Good eye Dave! Thanks for sharing....

If we ever get a diode that can take 4 Amps, the FlexModP3 will already put out that much current.

It is a linear driver, and using the Feilong 6000mAh 32650's that I have available by the way, they can easily handle 4 Amps...

My Maglite Monster kit will do the job.

In fact, I know the Feilong's can handle over 8 Amps current draw from using them in other builds. (possibly more)

Not really a big fan of the Maglite, or any flashlight host in fact.

I'm sure Ehgemus can pump us out some original hosts to handle these diodes.

jayrob · Mar 13, 2012

Ok well you had asked about battery technology and driver to handle a 4 Watt diode in a hand held laser...

So I was just pointing out that we already have that capability! :beer:

Tech_Junkie · Mar 13, 2012

DTR said:
I have batteries that will discharge as high as 100A. I think we will be ok there.

......

thanks for the info Jay.

kobi g · Mar 13, 2012

rhd said:
It will be quite interesting to see what form factor / package Soraa goes with for 4W diodes. 5.6mm wouldn't be my immediate guess. I would think 9mm a more logical route, or even something non-standard.

From what i saw on the market - most likely it will be in TO-3 or even C-Mount especially for higher power like 4W and Up
(commercial 4W 808nm are using it also)

Tech_Junkie · Mar 13, 2012

kobi g said:
From what i saw on the market - most likely it will be in TO-3 or even C-Mount especially for higher power like 4W and Up
(commercial 4W 808nm are using it also)

Who let Buzz Killington in?

buzz_killington_191x300_RE_So_troll-s191x300-152037-580.jpg

:na:

rhd · Mar 13, 2012

DTR said:
From my experience placement in the array and bin level are are not correlated. I have seen high efficiency and low efficiency ones come from all over the place in the arrays.

It's interesting actually, if you look at the serial data that BobHaha photographer from 12 diodes on one array, it's pretty clear that the diodes came from three (3) distinct diode batches:

http://laserpointerforums.com/f42/collecting-445-diode-qrcodes-serials-72446-2.html#post1043808

Blord · Mar 14, 2012

I have received the A-140 and the H1600 diodes from Dave. They were very good protected in a gel-like holder. I never seen such holder before. That is something new to me.

I began to take photo's of the diodes. Here are the results.

1] Left diode: H1600, right diode: A-140

2] Left diode: H1600, right diode: A-140

3] Left diode: A-140, right diode: H1600

4] The H1600 has a larger die, the black base is bigger than the A-140.

5] A-140

6] A-140

7] A-140

8] H1600

9] H1600

10] H1600

11] The H1600 has an extra round circle added to the data matrix.

12] Below are the pictures from the microscope. I don't have a camera adapter for this microscope. All photo's are taken manually.

13]

14] The H1600 has a crack in the corner. It was very clear when seen through the microscope. I don't know if it is still working. I have to build a laser from it.
Also the A-140 has a crack in the corner. I have no picture of it.
This picture has a magnification of 100X.

15] My equipements :

16]

DTR · Mar 15, 2012

Great pictures. Now that is makes the difference very clear.:beer:

kiyoukan · Mar 15, 2012

i have camera envy...

that was taken with a phone plus projector lens.
But that beast you have is amazing.
I think im going to start a camera thread about what are good decent priced cameras for simple people like me,

daguin · Mar 15, 2012

Great work, Blord

Thanks for doing this

33% more wires to carry current and a beefier die

There's not much doubt that the M and H series diodes are more powerful, eh?

On a more personal note -- ya gotta love how cleanly the de-canning tool removes the can :san:

+1 Blord

Peace,
dave

kiyoukan · Mar 15, 2012

is that the thor one?

A-140 vs. M-140 vs. H1600

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