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Old 04-21-2014, 05:27 AM #1
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Default 2W M140 445nm Laser Diode

2W M140 445nm Laser Diode

It occurred to me I don't have a testing thread up on the M140 even though it has been with us for a long time so here is one I threw together tonight and I will update it with more info soon. This can be a thread for testing and general discussion on the M140 diode.


There are a lot of used diodes out there being sold as new. Here is a quick guide to make sure you know what you are getting. First the spacer can tell a lot. There have been three spacers that have been used on the M140. First was the short spacer these were used from 2010-2012 for about a year and a half before being phased out. If you receive a short orange spacer there is near zero chance the diode is not pulled from a used high mileage projector. Second is the long orange spacer. These were in blocks from 2012 to the beginning of 2015 when production in China was ceased and moved to Japan. It is possible that you could see a diode pulled from a new projector with this spacer but it is getting very rare to find new stock projectors someone has been sitting on for over a year now. The current projector is manufactured in Japan and has a red spacer that is plastic very hard compared to the soft orange rubber spacers from the ones made in Japan. Your diode if purchased as new it really should have this spacer. The picture does not show it as well as I would like but in person you can pretty easily pick them out by eye.






Here is a quick power test on the M140 using a G-2 glass lens.


























Here is a thread showing when we first discovered this diode.
A-140 vs. M-140 vs. H1600



Here are some pictures of the guts of this new diode next to the old.

The M140 on the right, A140 on the left.






The A140 had three bond wires to carry the current.






The M140 has four bond wires giving it the ability to run at higher currents and have greater ouput.





On the M140 there is a circle above the bar code. This is on the back of the diode right next to the pins.








Last edited by DTR; 07-21-2016 at 06:38 AM.
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Old 04-21-2014, 10:34 AM #2
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Default Re: 2W M140 445nm Laser Diode

That is quite an efficient one and seem to handle 2A quite easily, Thanks for sharing.
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Old 04-21-2014, 12:44 PM #3
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Default Re: 2W M140 445nm Laser Diode

Good to know, because I have 2 of them. Thank you
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Old 04-21-2014, 12:55 PM #4
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Default Re: 2W M140 445nm Laser Diode

Quote:
Originally Posted by TimTom View Post
Good to know, because I have 2 of them. Thank you
Stay at 1.8amps or below. I hear these get unstable at 1.9amps, and it is pretty commonly accepted that 1.8 is the maximum safe current.

Dtr always pushes the diodes past the safe current. That doesn't make them safe

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Old 04-21-2014, 02:19 PM #5
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Your putting that new PS to good use ! I really appreciate the info you share. Sometimes I get readings that don't seem right. First thing I do is "go see what DTR got". Helps me a lot. Thank you.
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Old 04-21-2014, 03:41 PM #6
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Default Re: 2W M140 445nm Laser Diode

Yep keep to 1.8A @ 2A+ they drop in output like stones which could cause degradation.
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Old 06-17-2015, 09:48 PM #7
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Default

Quote:
Originally Posted by DTR View Post
2W M140 445nm Laser Diode

It occurred to me I don't have a testing thread up on the M140 even though it has been with us for a long time so here is one I threw together tonight and I will update it with more info soon. This can be a thread for testing and general discussion on the M140 diode.






Here is a quick power test on the M140 using a G-2 glass lens.


























Here is a thread showing when we first discovered this diode.
A-140 vs. M-140 vs. H1600



Here are some pictures of the guts of this new diode next to the old.

The M140 on the right, A140 on the left.






The A140 had three bond wires to carry the current.






The M140 has four bond wires giving it the ability to run at higher currents and have greater ouput.





On the M140 there is a circle above the bar code. This is on the back of the diode right next to the pins.





I have a hope now because I have two m140 s and just opened and hopked up a buck 180 but when I powered it up.....it looked like a zombie diode
Now I realize that I need two 18650s to get it up to power.....I was only using one
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Old 06-18-2015, 01:38 AM #8
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Default Re: 2W M140 445nm Laser Diode

Yes as Hak stated 1.8A is the sweet spot for this diode I have 4 or 5 builds with them in it. Jordan thank you for all this great info on such an efficient diode this one will never disappoint you. Good bang for the buck to I like them tremendously worth every penny.
Thanks again for an awesome review Jordan
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Old 06-18-2015, 07:49 AM #9
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Default Re: 2W M140 445nm Laser Diode

A more complete database is a good data base

Also dregalado331, no need to quote dtr's entire post with pics.

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Old 06-18-2015, 10:10 AM #10
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Default

Yea well I was afraid that I did something wrong and I did.when the diode arrived and the driver w was still on the way I used an old driver tool to check out this new H Series M140.(this driverwas missing a resistor next to the eight pin chip so it must tell the driver how much power to let the LD have.) That diode turned into a zombie like the other one two weeks ago(funny how ill forget these details and try to make sure a zombie didn't c get back to life by chance.)I should have waited for the stable driver cause now ill have r to buy another diode and wait for it to showh up let this be a lesson for myself and all others...don't be impatient.....the project is worth the, wait .use a new diode with a new driver.If one driver blows one diode Don't use it again.
T this is my fourth m140 and two were successful they are beasts I hit the on switch and the neighbors look out the window thinking it is lightning .
People ask why do I spend so much money and time on lasers.well you know what the answer is. The challenge of building something so small and power eco ill

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Old 06-18-2015, 10:22 AM #11
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[QUOTE=dregalado331;1365139]Yea well I was afraid that I did something wrong and I did.when the diode arrived and the driver w was still on the way I used an old driver tool to check out this new H Series M140.(this driverwas missing a resistor next to the eight pin chip so it must tell the driver how much power to let the LD have.) That diode turned into a zombie like the other one two weeks ago(funny how ill forget these details and try to make sure a zombie didn't c get back to life by chance.)I should have waited for the stable driver cause now ill have r to buy another diode and wait for it to showh up let this be a lesson for myself and all others...don't be impatient.....the project is worth the, wait .use a new diode with a new driver.If one driver blows one diode Don't use it again.
T this is my fourth m140 and two were successful they are beasts I hit the on switch and the neighbors look out the window thinking it is lightning .
People ask why do I spend so much money and time on lasers.well you know what the answer is. The challenge of building something so small and powerful is really amazing there at&t many ways t mess it up but one right way to success when you do I it right it is a rush and when you turn it on is confirm ation
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Old 06-18-2015, 11:22 AM #12
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Quote:
Originally Posted by dregalado331 View Post
Yea well I was afraid that I did something wrong and I did.when the diode arrived and the driver w was still on the way I used an old driver tool to check out this new H Series M140.(this driverwas missing a resistor next to the eight pin chip so it must tell the driver how much power to let the LD have.) That diode turned into a zombie like the other one two weeks ago(funny how ill forget these details and try to make sure a zombie didn't c get back to life by chance.)I should have waited for the stable driver cause now ill have r to buy another diode and wait for it to showh up let this be a lesson for myself and all others...don't be impatient.....the project is worth the, wait .use a new diode with a new driver.If one driver blows one diode Don't use it again.
T this is my fourth m140 and two were successful they are beasts I hit the on switch and the neighbors look out the window thinking it is lightning .
People ask why do I spend so much money and time on lasers.well you know what the answer is. The challenge of building something so small and powerful is really amazing there at&t many ways t mess it up but one right way to success when you do I it right it is a rush and when you turn it on is confirm ation
Why are you quoting your previous post and editing it? There is a edit button.

Last edited by marcuspeh; 06-18-2015 at 11:23 AM.
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Old 07-07-2015, 11:27 PM #13
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Default Re: 2W M140 445nm Laser Diode

just a heads up, in your listing on your site, the title sayd "didoes" instead of diodes XD
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Old 07-08-2015, 10:43 AM #14
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Default Re: 2W M140 445nm Laser Diode

Yep typos happen.
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Old 07-08-2015, 11:02 AM #15
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Quote:
Originally Posted by DTR View Post
Yep typos happen.
There is also a typo on the word 'meter' in NUBM44 diode page.
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Old 07-08-2015, 11:17 AM #16
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Default Re: 2W M140 445nm Laser Diode

Quote:
Originally Posted by marcuspeh View Post
There is also a typo on the word 'meter' in NUBM44 diode page.
The word "meeter" is in 2 places on that page, once near the top and again at the beginning of the testing.

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