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ArcticMyst Security by Avery

10x Blu ray Burner from Buffalo

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I still can't figure out how the 8x being 2xs more than the 6x is comming up with all that power. The 4x power ratio step up to the 6x not is not exactly mind blowing.

The step up in power from the 6x to the 8x time is very impressive.
 





HIMNL9

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I still can't figure out how the 8x being 2xs more than the 6x is comming up with all that power. The 4x power ratio step up to the 6x not is not exactly mind blowing.

The step up in power from the 6x to the 8x time is very impressive.

Cause, probably, we usually refer to these diodes with the speed of the burning (4x, 6x, 8x) and not with the real power that they can emit, that in some cases, none knows.

So, it's possible that (just for make an example), the 4X diodes was underdrived (where, instead, we try to drive them to their limits), so for step to the 6X, they just had to increase a bit the power of the diode, and we notice this as a limited improvement ..... where, instead, at this point, the power needed for the 6X burning was just the needed, so passing to 8X, they made a quality step and produced a much more powerful diode (that we see as a big increase in max power), and for that what we know, is also possible that these diodes are not used at full range in 8X writing operation, too .....

As daguin already stated

So the 10X is reporting faster burn speeds, but we don't know if the faster speed is the result of a new, more powerful diode, or just better optics and/or software.

so, who know ? ..... maybe, the 10X is the same diode as the 8X, with better optic, or better driving, or also just drived to its normal limit ..... if was 12X or more, i also may considerate a new class of diodes, but with 10X, who really know ?
 
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Why Buffalo? They are a subpar electronics company. I hope they turn out great, but I just can't picture it.

Well, I will be searching for it in the begining of September. (apprarently it's going to cost about $330 USD)
 

daguin

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Why Buffalo? They are a subpar electronics company. I hope they turn out great, but I just can't picture it.

Well, I will be searching for it in the begining of September. (apprarently it's going to cost about $330 USD)

They are re-branded, LG made drives.

Peace,
dave
 
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Unfortunately, we do not have this kind of info. We do not get data sheets for the diodes. We estimate rated power by testing the power slope of a diode and taking note of the location of the first "kink" in the slope.

We push diodes beyond what the manufacturer designed them for. However, the output needed in a bluray burner is controlled/limited by many other extraneous variables. Most of these are not restrictive on us.

I can GUARANTEE ytou that the 8X diode is NOT rated to go to 500mW. What is it rated to? We don't know.

Unfortunately, until we get one into our hands, there is no way for us to know how high a 12X can be pushed.

Peace,
dave

This is why i love this furum we have people like Jay-Dave-Igor-Kenom
who take the time to test and murder these diodes so us noobs know our limits
 

ZRTMWA

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I bet the diode just has better optics or it is driven at a higher current than other 8x's.
 
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Thanks for the link larryo, and ehh maybe not ZR, and if they're cherry picked diodes I'd be ok with that :)
 
D

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uhm, I guess we could also try to contact LG and just ask them about this?
 

HIMNL9

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uhm, I guess we could also try to contact LG and just ask them about this?

Something like:

"Dear mr. LG CEO, we need to know how much we can push your 10X burner diodes, because we need them for harvest and build DIY burning lasers ..... thanks" ?

(LOL :D)
 

Krutz

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How about
"dear tech support, i am doing a report for a technical portal about the current high-tech br burners from LG, and would like to know if LG archieved this large step from 8x to 10x as the worlds first by further optimizing the optical path or by using an even higher output lasersource. in short, does the 10x use a stronger diode than the 8x?"

if the guy receiving this mail thinks there is public attention involved, he might forward it to someone who knows. as free advertisement. but then i wonder if/why there is no "real" announcement from LG directly..

manuel
 

HIMNL9

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..... but then i wonder if/why there is no "real" announcement from LG directly..

Uhm, as far as i know (and i admit that is not too much), i never seen them, in public announcements, mention anything about diodes classes and parameters ..... at least, all the advertisements / announcements that i've seen, always speak about new characteristics, new fault-toleance levels, new speeds, but never mention inside components specifications ..... so, probably, also if they release some new communications about this, we can't find anything, in it, about the diodes themselves, imho ;)
 
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Here is some actual power press releases:

"Sharp's blue-violet diode, GH04P21A2G, is a 406-nm laser with 210-mW optical power output in pulsed operation with a 10,000-hour lifetime at 75 degrees C. The optical power meets assumed requirements for drives and recorders that record data at 6 times normal speed on two-layered Blu-ray disks."

Source EE Times

Sanyo states 250mw peak power for 8X BR writers.

LarryDFW
 
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ZRTMWA

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So, the output achieved from 8x diodes after they are overdriven is roughly double their normal peak output.

Damn!!!!! That means 12x diodes will possibly be able to be pushed to 900mW, if Sanyo is right about the 12x's putting out 450mW whilst still in the Blu Ray burner!!!!!!!

hehe I actually used math during Summer. And I finished the ratio.

Here is a link to the article that said Sanyo 12x's will be driven at 450mW. It can probably also be found on Sanyo's website: http://www.engadget.com/2008/10/06/sanyos-laser-could-bring-12x-blu-ray-burners-and-100gb-discs/
 
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