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If you get the pinout wrong, it dies. Unless you pass a small current through it (from what I've gathered). LDs need to have tight current/voltage regulation and need to properly heatsinked. A dead laser diode will only have a dim output and from how many of these I've killed just with a...

Got any idea how far I can drive it before it fries itself? Also, as long as my voltage is above 2.2V does it matter what I set my voltage to? Like I could set it to 10V but as long as the current is 120mA it doesn't matter.

I've extracted several laser diodes from DVD burners. I have no idea how much voltage or current I should run through these diodes with a proper heatsink. I've also extracted a 4 pin laser diode from a GH70N 2012 HL Super Multi DVD rewriter. It only had a one diode but the warnings say it has...