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Strange effect with 445nm diode and driver.

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Jul 4, 2008
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So, I finally managed to pull off a 445nm in a MAXSINK. WOW!
I am impressed, however my driver went nuts trying to drive it at 400mA. I used a 6v PSU rated for 2.5Aamps. The diode pulled so much out of the driver the pot started getting too hot. At full power on the driver I got 4.6v @ 410mA. The output can burn/scortch dark paper at 15ft after about 4 seconds!
 

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A little note for safey. This is an example of what can happen with an unfocussed beam.

I used a black binder as a temp beamstop.

Voltage to diode was 4.6v at 405-410mA here. Shows you even at this power why eye protection and ALL flammables need to be well away from the beam. Output Iam guessing is around 390-400mW? If you know correct me.
I was using a 405nm coated o-like glass lens.
 

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Nice job, I wondered what that type of psu would do with this diode. It's a current monster. Probably run ok at twice that rating.
 
What is "that" rating? Do you mean run it at 2W? or run it at 800mA?
I'd heard that the A103s would gladly take 1100mA at 4.3-4.5vdc
 
No, I mean if your psu was rated for double it's capacity, 6V at 5A, as well as a higher powered pot. The current demand might have been met, and therefore keeping the forward voltage of the LD within specification as well. Still, we all enjoyed your experiment! kudos
 
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