Old 12-28-2009, 02:45 AM #1
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Default LD from 40x CD-ROM reader - worth the harvest?

I acquired an old Dell server that I'm salvaging for parts.

The optical drive that came with it is a Samsung CD-Master 40E (Model SC-140) CD-ROM drive, manufactured in October 1999. I believe it's a 40x. Read only.

I know this is an IR diode. And I know about the IR dangers and proper eye protection....

My question is this:

Is this LD worth harvesting for anything?

I'm not worried about it burning stuff. But could it be used to make a DIY greenie (for the learning experience)? Or is there another useful purpose for an IR diode?

If it is worth harvesting, what sort of output could one get from a 40x, provided a proper driver is used?

Thanks for everyone's input on this. I just don't want to waste my time on a 10-year old diode if it isn't worth it.


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Old 12-28-2009, 03:35 AM #2
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Default Re: LD from 40x CD-ROM reader - worth the harvest?

It's worthless. You'd get like 1mW most if you made a green with that. Don't waste your time and trash it.
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Old 12-28-2009, 08:22 PM #3
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Default Re: LD from 40x CD-ROM reader - worth the harvest?

Definitely not powerful enough to be worth the hassle. CD rom drives and even CD burners have rather weak IR laser diodes that only output a few milliwatts, but be careful, they're still strong enough to blind you permanently!

If you really want to experiment with IR, I suggest you look up 1 watt IR diodes on eBay... you could find one in the $30/$40 range... and that puts out some serious stuff!

Another way is to disassemble a cheap green module from DX, and pop off the slug with the DPSS crystal, (my picture on the right) that will give you a 250 mW to 500 mW IR laser (unfocused, so you'll have to find some IR-compatible optics if you wan to turn it into a burner laser.

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Old 12-28-2009, 09:51 PM #4
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Default Re: LD from 40x CD-ROM reader - worth the harvest?

OK guys, thanks for letting me know. It sounds like it's totally NOT worth anything, so I won't worry about it.

I was just curious if I could harvest it to put towards learning about crystals and greenies. But not with this particular drive's diode.

Thank you!
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- Researching: Red and Green lasers for firearms sight applications (handgun and AR-15 platforms)
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- Work-in-Progress: red diode extraction from HP dvd1035 drive
- Work-in-Progress: Computer PSU mod
- Future Orders: components for DDL Driver, LEDshoppe 50mW Green
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