Old 03-11-2010, 01:16 AM #1
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Default Cool Article - Green Laser Diodes

Cool little article here in this month's Compound Semiconductor magazine, about a little company called Kaai, which makes blue and green laser diodes. Prettyh neato for the non-technical types out there.

Compound Semiconductor - Kaai takes laser productions to new planes

Nice photo from the article:


Yeah, those are blue and green laser diodes.


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Old 03-11-2010, 01:33 AM #2
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Default Re: Cool Article - Green Laser Diodes

Very interesting reading.
In addition to Kaai's 523nm and 525nm,,Sumitomo and Osram Opto Semiconductors have developed Green diodes also.

Sumitomo's is 531nm and OOS's is 515nm

Also Rohm and Nichia and researchers at Rensselaer Polytechnic Institute have developed (or are developing) true green LD's

It won't be long, gentlemen!!
I've read <2 years for them to widely appear in laser TV's
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Old 03-11-2010, 01:42 AM #3
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Default Re: Cool Article - Green Laser Diodes

^Osram has gotten a little higher than 515, haven't they? Osram's and Nichia's separately-published results are pretty interesting for another reason too, because they're both on polar GaN, which is pretty freakin' amazing. All the other published green results are on semi-polar planes (except Kaai, because they haven't said and are keeping it pretty tight-lipped).

Kaai's is notable because theirs is actually CW, and is the longest-wavelength CW result that has been published.

I haven't seen any lasers published by RPI recently though, and the longest Rohm wavelength I recall is still right around 500nm.

ETA: Just found one article from RPI from Oct 2009 about them having optically-pumped lasing up to around 490nm, which means they still have a ways to go, since they still need electrical pumping to that level and higher wavelength.

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Old 03-11-2010, 01:47 AM #4
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Default Re: Cool Article - Green Laser Diodes

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^Osram has gotten a little higher than 515, haven't they? Osram's and Nichia's separately-published results are pretty interesting for another reason too, because they're both on polar GaN, which is pretty freakin' amazing. All the other published green results are on semi-polar planes (except Kaai, because they haven't said and are keeping it pretty tight-lipped).

Kaai's is notable because theirs is actually CW, and is the longest-wavelength CW result that has been published.

I haven't seen any lasers published by RPI recently though, and the longest Rohm wavelength I recall is still right around 500nm.
515nm is the highest I've seen for Osram,but my sources are 5 months old. A lot can happen in the SC world, in 5 months.
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Old 03-11-2010, 01:54 AM #5
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Default Re: Cool Article - Green Laser Diodes

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Originally Posted by Greenmechanic View Post
A lot can happen in the SC world, in 5 months.
Yeah, you're tellin' me.
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Old 03-12-2010, 11:15 PM #6
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Default Re: Cool Article - Green Laser Diodes

Nobody else interested?
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Old 03-12-2010, 11:53 PM #7
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Default Re: Cool Article - Green Laser Diodes

It's quite fascinating. I just wish they would sell those new blue and green LDs at an affordable price =/ =/ =/
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Old 03-12-2010, 11:53 PM #8
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Default Re: Cool Article - Green Laser Diodes

thats awesome! hopefully they can make .5 watt of 405 cheaper, and any power of blue!
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Old 03-13-2010, 12:03 AM #9
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Default Re: Cool Article - Green Laser Diodes

Sure I am interested. But since I am more dumm than you I don't know what you are talking about. So before I jump in I'm going to have to be much less dummer than this. Very cool article for us non-tech people...just wish I was less dumm.
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Old 03-13-2010, 01:16 AM #10
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Default Re: Cool Article - Green Laser Diodes

^lol
very cool, I'm sure that the we should see some cool laser stuff in the next few months that is newly affordable to us hobbyists. Isn't one of us taking apart that mini laser projector with the blue diode and green quantum dot laser? not quite a green diode, but the blue one is still cool.
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Old 03-13-2010, 11:35 AM #11
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Default Re: Cool Article - Green Laser Diodes

Excellent! I really wish that they could take some better photos though, it looks like LEDs to me .
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Old 03-13-2010, 12:04 PM #12
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Default Re: Cool Article - Green Laser Diodes

We are heading to a new age of diodes!
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Old 03-13-2010, 12:57 PM #13
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Default Re: Cool Article - Green Laser Diodes

High powered keychain greenies, it's looking pretty awesome!
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Old 03-13-2010, 01:26 PM #14
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Default Re: Cool Article - Green Laser Diodes

Wow. I wonder how long till we'll be able to get our hands on these.. I really hope it's sooner than "three to five years". Raw diode green. Do. want.
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Old 03-14-2010, 12:37 AM #15
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Default Re: Cool Article - Green Laser Diodes

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Wow. I wonder how long till we'll be able to get our hands on these.. I really hope it's sooner than "three to five years". Raw diode green. Do. want.
I'd bet in under two years.
Advances in semiconductor technology are measured in days or weeks, not months or years.

Read some of the archives here, from two years ago!! You will be surprised.
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Old 03-14-2010, 01:52 AM #16
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Default Re: Cool Article - Green Laser Diodes

Oh yeah believe me, I know; I remember just a short time ago, a blu-ray drive was still a real rare thing. I'm just wondering if it'll happen as fast as far as push for availability goes, since we had blu-ray driving 405nm diodes... According to the graph in that article, and some of the earlier articles on green diodes that i've read, green diodes really only started to 'happen' around mid last year, all around, at all.

I know there are projector and TV applications for green diodes but are there as much? And the harvesting potential?

Donno. I hope so. Really hope so.
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655nm:LOC 254mW ∙ OLIKE 221mW ∙ Yob 320mW
638nm:Sanyo 40mW ∙ HL63133 200mW ∙ PGL3C 463mWpk ∙ ML520 700mW
633nm:JDS1145 HeNe 28mW ∙ JDS1145 HeNe 26mW
612nm:MG 05LOR151 HeNe 3mW ∙ REO LSTP 3mW
609nm:REO LHOR 1mW
604nm:REO LSTP 2mW
594nm:Rigel 3mW ∙ LG PGL3C 15mWpk ∙ Lasos 7512 3mW ∙ CNI MGL3 58mWpk
589nm:CNI PGL3C 106mW ∙ CNI PGL3C 85mW
561nm:CNI PGL3C 30mW(41pk)
556nm:CNI PGL3C 20mW(22pk)
544nm:JDS1675P HeNe 2mW ∙ REO LHGR 2mW ∙ Lasos 7786 2mW
532nm:PGL3C 150mW(180pk) ∙ PGL3C 578mWpk ∙ PLC 440mWpk
515nm:JDS 221420GL ArI 30mW
510nm:52mW DG#2 ∙ 50mW 26650 DG
488nm:Nlx DPSS 7mW ∙ JDS 2214 ArI 40mW ∙ JDS FCD488 DPSS 25mW
ML:MG 65A106025 ArI ML 115mW
476/480nm:Nichia Diode 28mW
473nm:PGL3A 45mW(80pk) ∙ PGL3C 110mWpk ∙ PGL3C 95mWpk ∙ RPLB-25 60mWpk
465nm:DTR NDB7676 2.03w
458nm:JDS 2214VL ArI 8mW ∙ JDS 2214VL ArI 12mW ∙ RHD Diode 1.7W
452nm:Osram SM 47mW
445nm:Yob 1410mW ∙ Polaris 156mW ∙ PGL3C 1200mW ∙ DTR-EHG 32650 2136mW
405nm:Yob 630mW ∙ Qfox 750mW ∙ JETL PLC 780mW

Last edited by aryntha; 03-14-2010 at 01:56 AM.
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