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Problem with diode size.

Tamm

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Oct 21, 2015
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Hello again, im forced to ask your help again. I bought TO-38 laser diode(3,8mm diameter), but i didnt notice that somehow, i even dont know how i missed so important thing. I have TO-18(5,6mm) holder for diode and lens. My question is can i fit that diode into that holder? I thought can i just place it in there and fill it up with thermal glue somehow, it seems pretty hard but thats one chance. Any ideas? Thanks in advance.
 





DTR

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Jun 24, 2010
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I would no advise trying something like that. You would be best to get a 3.8mm module for the diode.:beer:
 
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Apr 14, 2016
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Hello again, im forced to ask your help again. I bought TO-38 laser diode(3,8mm diameter), but i didnt notice that somehow, i even dont know how i missed so important thing. I have TO-18(5,6mm) holder for diode and lens. My question is can i fit that diode into that holder? I thought can i just place it in there and fill it up with thermal glue somehow, it seems pretty hard but thats one chance. Any ideas? Thanks in advance.

Buy a Thin Copper/Aluminium foil, cutting the high 5/6 from the Diode wrap it tight to the diode as you can, make this so thick that you can press in...voila !

Thermal Glue is not a way, this glued two parts, is a relatively bad conductor and is normally very thin between two Tile's.
 
Joined
Sep 20, 2013
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I'm with DTR on this one. The cost of the correct module is a fraction of the cost of most laser diodes. Any trial and error fiddling with a TO-18 module to try to get good thermal dynamics using the TO-38 laser diode would most likely leave you with an off center diode and terrible thermodynamics.
 
Joined
Dec 15, 2014
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Hi,
You will need a diode press kit from Flaming pyro here on the forum. what it's purpose is to press the diode into a copper module for a 3.8mm diode. it's fairly easy if you take your time doing it. here are some pics to show what it looks like..

Rich:)
 

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Last edited:
Joined
Sep 20, 2013
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The press is a given, but he will still need a TO-38 module to press it into. There is no good way to use a TO-18 module for this diode.
 

Pman

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Nov 28, 2012
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Agreed. Get the 3.8 copper module. I've done some odd builds but I've yet to use anything but a copper module or large aluminum sink with the correct female press in size.
 




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