Osram 450 question

• Mar 15, 2013

• #1

WizardG

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Just out of curiosity, has anyone tried cooling one of the osram 450nm diodes with a TEC? I've seen that the M140s, and especially the 9mm 445s, seem to get quite an efficiency boost when cooled well below room temperature (something I plan on exploiting in my next build) and I was wondering if the 450s might benefit from being chilled down as well.

Thanks!

 

Last edited: Mar 15, 2013

• Mar 15, 2013

• #2

Gryphon

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Double thread?

I dont think anyone has cooled that particular diode, but its stands to reason that it will help it. Diode lasers in general benefit form active cooling, while dpss lasers benefit from temperature regulation.

 

• Mar 15, 2013

• #3

pschlosser

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where will the TEC hide the heat, once it's slurped away from the diode?

 

• Mar 15, 2013

• #4

WizardG

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pschlosser said:

where will the TEC hide the heat, once it's slurped away from the diode?

Click to expand...

I'll be using a fan cooled heat sink on the other side of the TEC.

Now, how do I delete the duplicate of this thread I accidentally created?

 

Last edited: Mar 15, 2013

• Mar 15, 2013

• #5

weeba2kv

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why spend all that crap on a TEC if a big heatsing works just as good

 

• Mar 15, 2013

• #6

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blasterman

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Well, if you want to get below room temperature ambient you really need TEC. Not that I know anything about 445 performance below 30c or so.

I just use the Z-bolt heat sinks and an aggressive fan.

 

• Mar 16, 2013

• #7

weeba2kv

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nothing changes below 30c

 

• Mar 16, 2013

• #8

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Things

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weeba2kv said:

nothing changes below 30c

Click to expand...

Yes it does, just not enough to make it worthwhile in a handheld

 

• Mar 17, 2013

• #9

weeba2kv

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shifting a few nm and maybe 10 - 100 mW extra power , not visible for the eyes

 

• Mar 17, 2013

• #10

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Soulstorm

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Will just shift closer to 445, use less mA for same output, not worth it IMO.

Red on the other hand, cool them like the ice age is back in fashion and reap the rewards.

 

• Mar 18, 2013

• #11

weeba2kv

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ok it's a red diode but results are the same

 

Last edited: Mar 18, 2013