ahhh good explanation you have there brtaman. I think you're probably right. It's the energy density.
However if this theory holds water then wouldn't a CD burner require an enormously powerful diode?
Btw, I wasn't aware that HDDVD used the 0.6mm/0.6mm design just like DVDs.
You bring up an interesting point! This is why I love forums. :beer:
However, with HD-DVD as opposed to CD, there is A LOT more data being written in the same time also disk density is much lower. At the same time the film itself could be "easier" to burn? Then again I am sure the earlier CD burners, the ones I was drooling over as kid, that cost as much as a car, were probably also sporting a heavy duty IR diode?
As you said it was more of a theory than anything else. But we also have to take into account that these driver were the beginning of HD-DVD consumer technology, the optics and other factors were definitely not too efficient, the drop in power within the same drive between the two possible sleds colaborates this. I think it is these factors combined that could in some way describe the power of the phr diode.
There have also been theories that the PHR used a HD-DVD burner diode, no one has taken one apart so we cannot compare, from a business stand-piont this theory could be considered feasible.
However, one thing is certain, Blu-ray reader drives (PS3 sled) are generally of much lower power than any HD-DVD reader diode (811, 803), this I believe is due to the energy density.
