Current in A140

[jbord39]

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

 

[LORDJET]

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?

 

[DrSid]

AFAIK as you get close to 2A, the output does not increase much any more.

 

[DTR]

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.:beer: