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FrozenGate by Avery

1W green diodes soon?

T

Thories

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sounds too good huh? well i looked at wikipedia (unreliable but its been there for a while so im assuming its got some truth to it) and saw that holographic discs use green lasers in the order of 1WATT!... http://en.wikipedia.org/wiki/Laser just scroll down to "Example uses by typical output power" im just dreaming of a 1 watt green diode.... i suppose they could use crystals but i cant imagine it really......

oops just adding i put it in this section cos i misread the wiki article and thought it said yellow.... i wish..... so how do i change where i put this?
 





man..1W green is like a weapon! Personally, I like portable size lasers like CNI's.
 
lol wut about portable size lasers like CNI's with 1W ;D

we are rapidly approaching lightsabers!!
 
lol 20 years from now well probably laugh our asses off when we see our "amazingly powerful lasers"
 
DoughDTD said:
lol wut about portable size lasers like CNI's with 1W  ;D

we are rapidly approaching lightsabers!!
Click to expand...
a lightsaber that will reach over 10000 feet...lol
 
i have a questions why dont they have just bare diodes for greens when they build them for blu-ray and reds?
 
They haven't yet made a stable enough compound that emits green light. 405nm light was something that has been in development for years now. Nichia just managed to find a stable enough condition to make it work well under no special conditions. Green and blue are there... and many other colors too, but they are all very unstable and require very specific conditions. Some of the ones I know require a special pressure (hi-vac) and some others require a constant temperature around -200 Degrees Celsius! Other require a constant heat... etc. Try and replicate these conditions in a pointer :P That could just be a money maker right there ;)

--DDL
 
I'm pretty sure the 1W green reference was to a DPSS module (and one that would likely run well over $2k), not a bare diode. I didn't see anything to indicate it used a focused diode. Even if they could make 1W green feasible in diode form, that power in a horizontal emitter diode would mean its a multi-mode diode and I get the feeling the beam would not be coherent enough for the task.
 
I agree with you on that Pseudo. But, although I have not personally done any research about it, I am aware of the fact that some form of green diode laser is definitely in the works. Perhaps not a 1W diode, but something comparable to the BluRay start :) I wonder what that would strike... "Green Disk"s? ;)

--DDL
 
Daedal said:
...
Perhaps not a 1W diode, but something comparable to the BluRay start :)  I wonder what that would strike... "Green Disk"s? ;)

--DDL
Click to expand...
There probably won't be much of a demand for 495-570nm DVD players since 405nm is smaller and can store more data. Although it would be cool to have a "Green Disk" player. :)
 
Haha... or expensive! :P ;D

But I agree with you r8nd0m. The smaller footprint of the 405nm lasers makes them that much better. Although, not sure if you read the article, the combination of multiple layers on the same disk provides HUGE space... If the disks becomes commercially available, I'm sure there would be a way to turn them into cheap dichro's then ;D

--DDL
 
userhck said:
[quote author=RobTheVIP link=1186192781/0#1 date=

1186202513]man..1W green is like a weapon! Personally, I like portable size lasers like CNI's.
Click to expand...
true[/quote]

Yep, you don't need to worry about a garage when all you have is a toy car ;)
 
Green 'direct injection' diodes may be on the way. I like direct injection diodes primarily for conceptual reasons - they are small and very efficient at converting electricity directly to light. In fact direct injection LDs have the highest quantum efficiencies of any light source - in some cases over 80% of the input power leaves the diode directly as light. This is better than anything out there, including the new efficient LEDs.

See these nlight papers:
http://www.nlight.net/publications.html

Laser diodes are what have made all laser pointers possible. A green DPSS laser is essentially a flash pumped laser, made efficient by the use of the 808nm pump diode which is precisely tuned for maximum absorption by the Nd doped crytal.

Uh, anyway, there are still manufacturers working on green direct injection LDs, primarily for use in compact full color projectors.

In the 90's Sony attempted to create green LDs for the next generation of optical media. They were stymied by very short lifetimes, and eventually gave up. The did get one working at ~515nm, but it only survived about 100 hours. See:
http://www.sony.net/SonyInfo/News/Press_Archive/199601/96D-014E/
Note, this is over 10 years ago now.

Sony's effort was eventually trumped by Nakamura's development of the violet laser diode. The short wavelength allows the highest density of bits to be packed onto a disc. For more on the development of the violet laser diode, see:
http://www.sciencewatch.com/jan-feb2000/sw_jan-feb2000_page3.htm

Recently ROHM announced they've made some advancements in growing stable crystal the may finally allow the development of LDs in the blue AND green part of the spectrum. See:
http://www.rohm.com/news/070201.html
 
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