Old 07-17-2010, 08:58 AM #1
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Default h55n laser diode

Hello everyone, i have just removed the LD from an lg h55n dvd rw, does anyone knows what are the specs for this LD? Or what mW,mA,V should i run this?

Any recommendation on the driver? I was thinking of using lm317 driver (http://laserpointerforums.com/f42/di...ver-26339.html) as its easier to build, and i already have the parts.

Thanks


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Old 07-17-2010, 09:32 AM #2
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Default Re: h55n laser diode

I would not go over 200mA. And that driver is fine. Make sure to put it into a heat sink or it wont last.
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Old 07-17-2010, 12:04 PM #3
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Default Re: h55n laser diode

Hi, thank you for your answer. Using 200mA x ~2.5V from the driver is 500mW, wouldn't this be too high? Should i lower the voltage?
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Old 07-17-2010, 01:26 PM #4
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Default Re: h55n laser diode

I think i'm making a confusion here with the optical mW.
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Old 07-17-2010, 02:06 PM #5
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Default Re: h55n laser diode

Yes, the optical power will be much lower than the electrical power to the diode.
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Old 07-17-2010, 04:51 PM #6
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Default Re: h55n laser diode

Otherwise the diode efficiency would be 100%, and you then wouldn't need a heatsink.
Huh... if only....

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Old 07-17-2010, 05:24 PM #7
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Default Re: h55n laser diode

^ so true, if only....
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