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That helps put it into perspective for choosing an operating point. I'm gonna end up picking an operating point or heatsink, then basing the other off the decision. Sorry about the bad link. Here's a link to a specific heatsink instead of a list of search results...

Those are nice. I really like the style of the one in the last pic.

That gives a good estimate, especially considering the personal experience that you have with this diode. I would most likely operate the diode at 3A. From yours and the other replies I have read in this thread, it seems like running this diode continuously without a fan is not viable. However...

Interesting. The only specs I could find for it are bits and pieces from google searches and the data from DTR's posts. How do you know that they are incorrect?

In your first reply, you said you use the rail mounts with a CPU cooler, and I have never seen a CPU cooler without a fan. The product in the digikey link includes a fan, so it is out of consideration. You were good up until you delegitimized yourself by being condescending and calling this...

I'm reading your posts, but I do not want to use a fan as originally stated. It's difficult to find a heatsink with such a good heat dissipation that does not use a fan, so I'm figuring out what can be done to achieve a good heat dissipation without one.

Thanks for the reply. It does help. I think I'll opt for a lower operating point and use a larger heatsink, which would add to the aesthetic and give the laser a good feel. You may be wondering why I would buy a NUBM44 and operate it below 7W, and it's because the highest efficiency is achieved...

Most definitely. Can you run yours continuously in that heatsink?

Sorry for the late reply. I will definitely take a look at these.

This is an interesting question. I wonder how large of a heatsink will be needed to run a NUBM44 continuously at 7W? At about 4.5W? Even if we do not know for sure, I wonder what ballpark figure for the size would allow for a 100% duty cycle. Not sure if I already mentioned it, but has anyone...

That sounds like a nice setup. I assume the CPU cooler uses fans? If I could find (or design) a single heatsink to run the NUBM44 continuously, that would be ideal. I know there are differential equations that govern heat dissipation and whether the heat emitted exceeds the heat dissipated. How...

I am not quite sure how many minutes I will be running it. I want to achieve continuous running because the length of the cooldown time at the end of the cycle is not very defined, so I do not know how long I will actually have to wait. So, I would rather be able to run it continuously than have...

Due to power consumption and space issues, I will not be able to use a fan. However, I will opt for a lower power output if I can not run the diode continuously at 4.5A. I could probably do 3A to give a power output of about 5.4W. My priority is to have an effective heatsink with no fan, even if...

Found the heatsinks on ebay. I may just go with a smaller heatsink but pulse the diode.

Thanks for the replies everyone. Has anyone ever considered using water or liquid coolants to cool their lasers?

It would probably have to be able to dissipate 13W of heat. What kind of heatsinks do you have that could do that without fans?

What kind of lab host do you mean? I just did a quick ebay search, and there are lots of lab lasers available.

Thanks for the input everyone. For the interest of power consumption, I would rather have a larger heatsink without a fan than a smaller heatsink with a fan. Would it be possible to use a larger heatsink without a fan? How about water cooling or using other coolants? I am also open to the...

Hi everyone, I haven't been on here much lately. I hope everyone is doing well. I am currently in the process of making a new laser. It will be high powered, and I will most likely choose the NUBM44 diode for it. So my main question is, how could I run the diode continuously at a high power...

Interesting. I am familiar with the wavelengths changing by a factor of 2 in DPSS lasers. Thanks for the explanation.