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Registered Member #2919
Joined: Fri Jun 11 2010, 06:30PM
Location: Cambridge, MA
Posts: 652
ABSOLUTELY NOT NO NO NO Laser diodes suffer from catastrophic optical destruction; past a certain point, the power density at the facet is enough to destroy it.
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
+1... Laser diodes are temperamental little beasts that will die if you look at them wrong. Besides hitting the optical damage threshold, you can kill them from plain overheating.
The packages might all be the same, but the thermal resistance from the part of the chip where the heat is generated, to the can, will be different.
Registered Member #3637
Joined: Fri Jan 21 2011, 11:07PM
Location: Buffalo, NY
Posts: 1068
Steve Conner wrote ...
+1... Laser diodes are temperamental little beasts that will die if you look at them wrong. Besides hitting the optical damage threshold, you can kill them from plain overheating.
The packages might all be the same, but the thermal resistance from the part of the chip where the heat is generated, to the can, will be different.
Is the kind of answer I was wondering....
Since *most* laser diodes are in a TO-18 can, it seemed to me that they all ought to be rated the same; But, as Steve said, they have different thermal resistance to the actual can... too much power, and the heat just can't escape quickly enough.
How big of a heatsink does a 200 mW laser diode need? I have a small press on finned one I'm going to attempt to use, and if that doesn't work, I guess I'll try drilling one out of aluminum.
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What determines the power output of a laser diode?
