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Old 01-20-2011, 07:13 PM #1
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Default Current in A140

Hey guys,

I am working on a driver for the 445nm A140 (harvested from a casio projector). I am wondering if anyone has tried pulsing this diode at higher than recommended currents at high frequencies.

Does anyone know what the maximum current ratings are; and if the laser would be more likely to break from high current density or from heat.

If the laser burns out from high current density then I don't think pulsing it would help, but if it burns out from heat then maybe pulsing the diode at a high frequency could work.

Thanks for any info,

John


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Old 01-21-2011, 09:47 PM #2
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Default Re: Current in A140

Hey John, that's a good question... However I am Ill equipped to answer that. I am still learning about these diodes myself, not sure about the higher frequency. Maybe someone else here would know that answer?
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Old 01-22-2011, 03:18 PM #3
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Default Re: Current in A140

AFAIK as you get close to 2A, the output does not increase much any more.
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Old 01-22-2011, 03:36 PM #4
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Default Re: Current in A140

I would suggest you keep it 1.8A or under. If you have an efficient diode you can get around 2W with a G-1 lens with 1.8A. Any more and you are risking your diode for very little gains.
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