any low power diodes on the market?

Hi,
Is there any low power blu-ray diodes on the market? Im thinking of getting some class IIIA blu-ray diodes since they are more eye-friendly.

i got 2 ps3 br for sale for 15 each and 4$(each) for a module for them. if your in the us ill do dree shipping and only a little extra for intl. shipping.

You can just turn down the power on any diode. Get the same PHR-803T diode, and drive it at less current, and it'll be a less powerful laser.

agreed.

pullbangdead said:

You can just turn down the power on any diode.  Get the same PHR-803T diode, and drive it at less current, and it'll be a less powerful laser.

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That raises one question to me though.. Even though the graph by Drlava shows the 803t outputting less than 5mW @ around 20mA or so, does it lase steady at that low of current, or even "choke out" on startup sometimes? Seems to me the PS3 diode or even the DT0811 diode is more suited for low power applications.

I would just go for the PS3 if you can get them for a good price. At 5mW it will last forever, you dont need a diode capable of 100mW if you honestly have no plans on cranking it up. On the other hand if a PHR diode is cheaper, then I too would recommend to just run it at a low current.

iohutom said:

Hi,
Is there any low power blu-ray diodes on the market? Im thinking of getting some class IIIA blu-ray diodes since they are more eye-friendly.

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Are any 405nm 5mW's diodes really that friendly? : I mean its very energetic light and really I don't EVER want 5mW's 405nm light to hit my eye.

--hydro15

what I meant was that can I get really dirt cheap bluray diodes just like the red ones on the market now, so that i can diy some at a low cost yet the color of the laser is still violet so I can show off with these lasers. I have powerful red and ir burners so i really don't expect this bluray to do much damage. any suggestions?

iohutom said:

what I meant was that can I get really dirt cheap bluray diodes just like the red ones on the market now, so that i can diy some at a low cost yet the color of the laser is still violet so I can show off with these lasers. I have powerful red and ir burners so i really don't expect this bluray to do much damage.  any suggestions?

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Yes . . .Read the Buy/Sell/Trade board and the Group Buy board

Peace,
dave

iohutom said:

what I meant was that can I get really dirt cheap bluray diodes just like the red ones on the market now, so that i can diy some at a low cost yet the color of the laser is still violet so I can show off with these lasers. I have powerful red and ir burners so i really don't expect this bluray to do much damage.  any suggestions?

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Read around a bit, because you can find 405 LD's between $18-$30 that can make between 90-140mW. And the "damage" that the 405nm laser creates just because of the wavelength is amazing. Easily light a white tipped match.

Glaserfan said:

[quote author=pullbangdead link=1221549025/0#2 date=1221581340]You can just turn down the power on any diode.  Get the same PHR-803T diode, and drive it at less current, and it'll be a less powerful laser.

Click to expand...

That raises one question to me though.. Even though the graph by Drlava shows the 803t outputting less than 5mW @ around 20mA or so, does it lase steady at that low of current, or even "choke out" on startup sometimes? Seems to me the PS3 diode or even the DT0811 diode is more suited for low power applications.[/quote]

Eh, not really. The lower power diodes do have a lower threshold, making them I guess in some way more suited. But as long as you're above threshold, you shouldn't have any problems with "choking out" or anything like that. These things are being used to read disks, after all, and they're reading those disks at a very low power in the drives. If they're good enough to be used reading disks at low power, they'll work just fine for pointing at low power too.

If you're very close to threshold, temperature variations may move that threshold current around some and make it sometimes reach threshold and sometimes not at a given current, so you want to make sure that you're a good bit above threshold in whatever you're doing.

That does make sense This part folows my point though..

pullbangdead said:

If you're very close to threshold, temperature variations may move that threshold current around some and make it sometimes reach threshold and sometimes not at a given current, so you want to make sure that you're a good bit above threshold in whatever you're doing.

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5mW(According to the graph anyhow) is very close to the threshold on the 803T, or any of the higher powered diodes. It does seem to make sense(to me anyhow) that @5mw, sometimes this temperature variation may mean that the diode will not lase. It just seems a little chancy to me Perhaps the OP would be better off going for 10mW if he uses a higher powered diode? That way the diode would be sure to lase no matter how hot/cold it is

EDIT: Just ckecked the graph again.. it seems the PS# and 803T diodes climb in power at about the same raste past their threshold points. It still makes sense to me though to run them at higher than 5mW, at least to make sure the diode ouputs at least that much power...not to mention 5mW of 405nm light appears VERY dim..