A long-range laser turret is good for burning holes in cars, while overdriving the world’s most powerful visible laser diode makes it even more interesting. Les Wright stumbled upon a scientific paper about a modified avalanche driver circuit, and the rest is history.
To make this laser even more powerful, he first created a high-voltage supply from a Nixie inverter module along with a function generator to provide the pulses. The driver was then able to generate 80 amps into a Nichia NUBM47 diode for just a few nanoseconds, and when everything was inputted, this laser setup produced about 67 watts of optical power.
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Another thing to consider is the threshold current of the diodes. They typically won’t lase until they are at a couple of hundred ma of current. You might want to think about being able to apply a dc ofset to get to threshold, then modulate on top of that. Of course now you will have to improve the heat sinking of the diode. I would also be curious what the diode is doing thermally,” said one commenter.
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