New Galiun Nitride laser diode at 405 nM to replace Blue Ray

[JimBo]

Doc
What would be the wavelength of the cheap blue?
S

Cheap blue is an oxymoron if there ever was one

Jim

[The_Doctor]

Cheap blue is an oxymoron if there ever was one

Jim

Not any more... As some of us just found out.
Even those will look expensive soon.

Steve-o, I don't know the wavelength, I can't find the thing I saw before, and I know it mentioned the creation of P-type material and lasing, but I think it's too new to specify product parameters.

As a guide to how new it is, look up "zinc oxide" and "blue laser" on Google. It's a trawl, but an interesting one because an explosion of new tech is imminent.

[steve-o]

Thanks Dr.
I found this..



"...The breakthrough develop will result in the cost of LEDs plunging to a mere one-tenth of conventional blue LEDs, which are made with gallium nitride. What's more, the new LEDs also will deliver 10 times the light-emitting efficiency. With the way now opened up for low-cost, mass-produced LEDs, and also laser diodes and other devices using zinc oxide, it is believed that the LED and laser diode market could expand by as much as several trillion yen."

I wonder if the blue laser diode prices will "plunge to one tenth"..

The whole article: http://www.jetro.go.jp/en/market/tre...05_05_led.html

[JimBo]

How visable is 405nm and what powers are we talking about?

Jim

[steve-o]

Jim-
I hope they won't be 405 and I dunno.
I just dogpiled it and came up with a few hits--not much info though.
They were talking about visible blue leds tho using zinc oxide so ...
Also they referred to the zincOx lasing without any cavity mirrors!
Steve

[steve-o]

http://franklin-sterlinghill.com/fra...nerals/zno.stm
"Zinc Oxide and You" -educational film.
(--From The Kentucky Fried Movie)

[ajohnson30]

How about dark suckers instead of light bulbs?

See http://www.repairfaq.org/ELE/F_Humor.html#HUMOR_013

(Go to #13 if it doesn't jump you there)

[stanwax]

Isnt it a shame that all the blu ray development is in the bordeline UV region, meaning that all the diode technology will be too short for us RGB laser freaks.
If this zinc oxide stuff does end up making the technology much cheaper then the development might shift to the laser TV arena where the violets are not welcome. Hopefully this might allow us to end up with at least a couple of hundred mW (but with a bit of luck much more) of useful blue light in the 450-480nm region which will be of much more use to us.

Rob

[buffo]

Also they referred to the zincOx lasing without any cavity mirrors!

Most direct injection diodes *don't* have cavity mirrors. The cleaved face of the diode crystal itself acts as the mirror.

The focus on near UV is to make smaller pits on the disc for optical storage. That's a much larger driving force than lasers for laser shows. (Though if Laser TV's take off, that will push demand for a 450-470nm laser...)

Adam

[stanwax]

Adam - was that pun intended 'Focus on...'

Rob