Old 06-05-2010, 11:46 AM #1
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Default Green diode update

While green diodes have existed for some time now, they have been pretty inefficient...

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Originally Posted by pullbangdead
Just to show how difficult/bad these things are (being first ever produced and all) and how much work has to be done, they gave the LIV characteristics of some of their diodes. The 531nm diode had a threshold current of 924 mA. Yes, almost a full amp of current before it even turned on. For their 520 nm diodes, which they say was about average with their new process, they give the threshold current as 491 mA, and a threshold voltage of about 18 V. Remember, a PHR has threshold at about 25mA & <5V, so that just shows how much work i9s still to be done. At 1240mA, well over an amp, they were only getting 28mW of power out of these things.
Until now!

Quote:
The 524nm cw emission of the packaged device had a threshold current of 97mA and a slope efficiency of ~330mW/A. The wall-plug efficiency peaked at an output power of 50mW.
Semiconductor Today



Edit: Forgot the Osram article: http://www.osram-os.com/osram_os/EN/...-operation.jsp


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Old 06-05-2010, 02:49 PM #2
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Default Re: Green diode update

We'll just have to wait for casio to make a new line of laser projectors with 24 1W green diodes
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Old 06-05-2010, 02:50 PM #3
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Default Re: Green diode update

I'm certain someone will be soon, I saw an article somewhere that said the green diode market would be a multi-billion dollar one by 2016.
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Old 06-09-2010, 07:05 PM #4
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Default Re: Green diode update

The osram page has the beam shot to prove it too.

and 50mW is quite a lot! LD's sure are exciting these past couple of months!
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Old 06-09-2010, 08:08 PM #5
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Default Re: Green diode update

Thanks for the reference, just saw this post. I posted about this article in the vets section, I knew it would make it out here into the real world, eventually. Here's the abstract and reference list for Osram's result: 061003

Pretty cool stuff, pretty amazing it works so well.



And another bonus, my name appears in their references, I was an author on one of the works they cited.

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Old 06-10-2010, 07:00 PM #6
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Default Re: Green diode update

I'm hopeful that green diodes will become highly popular soon. So Oram makes thoses, heh? I used to buy lamps from Osram a long time ago back in the days I was a projectionist:
Xenon Lamps - XBO Xenon Short-Arc Lamps from Osram

These high pressure xenon lamps were pretty damn powerful, and if improperly installed, would go off like a hand grenade!

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Old 06-10-2010, 07:59 PM #7
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Default Re: Green diode update

I saw the thread title, and my heart skipped a beat.
I thought their may have been some big announcement. About breakthrough in the green diode family. Like the low cost 445nm diode.

It's inevitable that we will soon see, low cost green diodes. Now that their is a growing consumer market out there. Projectors, televisions and monitors.
Before the only demand for green diodes, were for research, laboratories and other specialty fields.
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