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7W NUBM44-V2 450nm Laser Diode NUMB44-81/NUBM47-A1

DTR

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7W NUBM44-V2 450nm Laser Diode
This is the most powerful laser diode that is known to be available as of 6/21/2019

65254





Here is how the looks after being pulled from the NUB blocks.
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Here is the current king of the hill. The 6W NUBM44-V1(NUBM44-71/NUBM47T) is out of production for a long time and this new version never got its own testing thread mostly as my old LPM did not read any higher than 6.8W.
NUBM44-V1 Testing Thread.
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Here are some of the NUMB47-A1 blocks these are coming from.











Here are some collimated spots with af few common lenses.







CNC Engraving/Cutting.

Best option DTR-G-2 with a 30mm working distance from the aperture of the laser to the work with good ventilation.






Here is the new power test using a DTR-G-2.
Finally got full readings out of my new LPM with this diode..🍺








 
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DTR

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Sure thing
Nice, box me up a few for Christmas please. I will be your friend forever. I've been wanting to order two, might do so next month.
🎅Ho-Ho-Ho
Sure thing I do love playing Santa just hope I don't forget where I put it in 6 months.:p

Made a nice vidde test as well. Added to the OP.😎

 

trinh hong phuoc

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Thank you for this information, they are really nice,maybe 7.5W is the best power up talking about this diode,haha
and a coincidence, I have just obtained 2 from the xj-v2 casio6525565256
 

RedCowboy

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Trinh you can find the 10 LD blocks in the 110 unit however as far as I know the NUBM47-A1 and NUBM44-81 ( V2 ) are the same.


---edit---

I have not bought any nubm44's in a while, maybe I should get some from the latest batch as I can't break the 8W barrier, at 4.5a - 4.75a I get 7.5w through a DTR G2 from a new 44 that's 6-9 months old but zero hours runtime other than testing of course, and 7.2w from a year old but new 44 that should be a V2 through a DTR G2 @ 4.5a and finally 7.1w from a 3rd year old but new 44, all were tested with the same DTR G2 lens because even a slightly dirty lens can rob power so always test with a clean new lens.

I do suspect that the manufacturer is constantly making small improvements through sheer repetition of manufacturing and notching up the output and/or improving efficiency, plus there's always those extra strong freak diodes that I would hope they study and discover why they are better, but they likely only do any in depth testing of 1 out every 1000 or more.

65257
 
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trinh hong phuoc

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Trinh you can find the 10 LD blocks in the 110 unit however as far as I know the NUBM47-A1 and NUBM44-81 ( V2 ) are the same.


---edit---

I have not bought any nubm44's in a while, maybe I should get some from the latest batch as I can't break the 8W barrier, at 4.5a - 4.75a I get 7.5w through a DTR G2 from a new 44 that's 6-9 months old but zero hours runtime other than testing of course, and 7.2w from a year old but new 44 that should be a V2 through a DTR G2 @ 4.5a and finally 7.1w from a 3rd year old but new 44, all were tested with the same DTR G2 lens because even a slightly dirty lens can rob power so always test with a clean new lens.

I do suspect that the manufacturer is constantly making small improvements through sheer repetition of manufacturing and notching up the output and/or improving efficiency, plus there's always those extra strong freak diodes that I would hope they study and discover why they are better, but they likely only do any in depth testing of 1 out every 1000 or more.

View attachment 65257
Therefore, the capacity ranges from 7.5-8.5W, really laugh when some people claim 10W,I will say they are 7W +
 

trinh hong phuoc

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If I turn my laser power meters zeroize knob to the right far enough, I can make the display show 10 watts, easy.
a lot of people in my country believe that there is a 10w pointer with a nubm08 diode, even they cannot reach 7w,
Back to the thread, I found that this is a great performance diode, they reach 3w ả 1.8A and 6w at 3.5A
 

Alaskan

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Redcowboy is working on a pointer which will put out over 10 watts of 450 nm, but he's cheating using two NUBM44 diodes.
 
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BowtieGuy

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Thanks for the update on the V2's, Jordan, may have to pick up a couple. :)

If I turn my laser power meters zeroize knob to the right far enough, I can make the display show 10 watts, easy.
That'll do it ;), or you could measure your output like some of these guys do, just put your laser right up next to the LPM and then like magic, you've got a 10W laser! :ROFLMAO:
 

Alaskan

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Trap hot air in the sensor head like that pushing it tight against the hole and you bet, far more powerful than before.
 

RedCowboy

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Redcowboy is working on a pointer which will put out over 10 watts of 450 nm, but he's cheating using two NUBM44 diodes.
I am thinking I might get a couple of fresh V2 diodes, I have some in 20mm copper and 2 new 44's in 12mm copper that will fit the adjustable mounts but one is doing 7.2w @ 4.5a and the other 7.1w @ 4.5a...........I would like to see 7.75w each to start......so yea, probably get some late date diodes.

p.s. The adjustable mounts have very little threads up top for the locking screw, I was thinking I could scab onto the top or possibly use solid mounts as I adjust the alignment at the lens barrel thread play anyway and they would move heat better if solid, although these do seem to move heat pretty well but I will need th fix the top locking screw threads.
 

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GSS

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Where did you get those mounts? Looks like you plugged one big hole on the sides? as I can see light coming through from the top set screw from the first pic.
I'm curious, can you post a couple more pics?
 
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paul1598419

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Thank you for all the new information on these high power blue blocks, Jordan. It does look like they eek out a bit more power than the older versions. Don't know how valuable an extra 0.75 watts will be when you are already getting 7 watts out, or close to it.
 

RedCowboy

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Where did you get those mounts? Looks like you plugged one big hole on the sides? as I can see light coming through from the top set screw from the first pic.
I'm curious, can you post a couple more pics?
Ok not wanting to get off topic, but these were made by Trinh, I did not ask if they were cut on an EDM machine but the tolorances are quite good, they are similar to some concepts I posted before like these pics, I'm sure you can contact Trinh if you want some made.
 

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DTR

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Trinh you can find the 10 LD blocks in the 110 unit however as far as I know the NUBM47-A1 and NUBM44-81 ( V2 ) are the same.


---edit---

I have not bought any nubm44's in a while, maybe I should get some from the latest batch as I can't break the 8W barrie
Yea the NUBM47-A1/NUBM47-81/NUBM44-81 all test out the same slightly more efficient than the ones out of the older NUBM44-71/NUBM47T blocks.

One note though as is usual efficiency and wavelength are inversely proportional. These are coming up lower in wavelength than the V1's from multiple customer testing being reported back. Might need to start calling them 445nm not 450nm.

Yea you won't get a stable 8W unless you employ active cooling. That is the difference when people talk peak vs the stable. 7.2W-7.4W is about where you can expect for a stable passively cooled unit.


If I turn my laser power meters zeroize knob to the right far enough, I can make the display show 10 watts, easy.
Yep pretty easy to show high numbers. Here I just used some ice and cranked it. Is this now a 9W?

This is what I consider a proper way to do a power test displaying the capabilities of a product. I will be adding these to the site again and made a test of the 20mm version. The test should be for at least the minimum duty cycle claimed or a full minute whichever comes first. Just showing the peak and then turning it off does not give a sense of the stability and it can reveal some fatal current regulation flaws that are common with improperly built circuits and cheap china drivers.


Here is a fatally flawed unit can you spot why?
 
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