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Old 02-10-2011, 06:39 AM #17
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Default Re: Anyone knows anything about a Pr3+ laser?

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Originally Posted by LordKaramazov View Post
Well...Pr3+ is a Rare-earth element as Nd3+...and u can pulse Nd and u can also get CW...our greenies are Nd, or am i wrong??...ive read a bit about it and the 482 line is a quasi-tri level lasing scheme...

And i think they are obtaining an efficiency of 18%...which isnt that much...but lets say u pump it with 4W, u still get around 800mW...of multiline ^^

I think they still got to develop the right host material for the doping...and maybe also a 2nd doping for a different type of upconverting (i dont know if they are actually doin it...i think in fasers they use Yb for the upconversion...)
Well, it's shown running CW (or so you'd think) in the video.

Quasi-three-level is hard to get right, but it certainly isn't impossible. The 946nm line of Nd:YAG is a quasi-three-level system, and that accounts for the difficulty in getting lasing (not to mention the competition between it and the 1064nm line).

If it's four-level, then it should be fine. If it's quasi-three, it'd be doable, but hard. If it were three-level, CW would be nearly impossible.


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Old 02-10-2011, 10:03 AM #18
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Default Re: Anyone knows anything about a Pr3+ laser?

the other lines in the visible (inlcuding the 719) are all four-level lasing schemes...the only really great (imo) one is a damn quasi-three level thingie.


Actually, ive found out that they got efficiencies between 14% to 40% (14 for both green and orange lines,30% for the 720 line and 41% for the red line).

oh well
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Old 02-10-2011, 10:10 AM #19
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Default Re: Anyone knows anything about a Pr3+ laser?

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Originally Posted by LordKaramazov View Post
the other lines in the visible (inlcuding the 719) are all four-level lasing schemes...the only really great (imo) one is a damn quasi-three level thingie.


Actually, ive found out that they got efficiencies between 14% to 40% (14 for both green and orange lines,30% for the 720 line and 41% for the red line).

oh well
Think of the upside- cheap DPSS red (maybe even as cheap as 532nm).

Traditionally, high powered reds have either been very expensive (for 671nm and 659.5nm DPSS), or had extremely bad beam specs (think 3mRad, and 7x7mm beam diameter at aperture).

With a 40% efficiency rate during conversion, cheap DPSS red with beam specs matching green will finally be available for a reasonable price. Sure, common diodes such as LOCs and LCCs are 'high-powered', but in a projector with many watts of green and blue, 250mW doesn't go very far.

It's all relative, us pointer folks may not get much out of it, but other people, such as those who run laser display systems, will.
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Old 02-10-2011, 10:29 AM #20
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Default Re: Anyone knows anything about a Pr3+ laser?

Actually my next project (maybe only in 1 year or so) will be a laser combining (like the white fusion mix) in a labby and maybe, also attach a projector to it...and if by then id have a red with great beam specs to match the greenie, it would be great!
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Old 02-10-2011, 05:02 PM #21
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Default Re: Anyone knows anything about a Pr3+ laser?

Look what i found today!

its a company that develops fasers and glass with Pr doping and they got a movie on it...and actual beam! And its white!!!!

>>check it out here<<

oh, and this:
.pdf of the white laser
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Old 02-10-2011, 05:39 PM #22
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Default Re: Anyone knows anything about a Pr3+ laser?

That felt like a high school science class documentary.

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Old 02-10-2011, 06:34 PM #23
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Default Re: Anyone knows anything about a Pr3+ laser?

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we need pullbangdead and goninanbl00d here. Someone call'em
Sorry, I know nothing about this topic.
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Old 02-10-2011, 08:59 PM #24
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Default Re: Anyone knows anything about a Pr3+ laser?

Oh damn!

On the second link on my last post...

Check the date on the bottom right corner!!

and they are using a 445 diode already!! Damn factories...should start selling this thingies right now...cmooonn!
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Old 02-11-2011, 08:41 PM #25
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Default Re: Anyone knows anything about a Pr3+ laser?

@pullbangdead
Thanks for reading anyways. Isn't it interesting?

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Old 02-11-2011, 08:49 PM #26
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Default Re: Anyone knows anything about a Pr3+ laser?

UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU WIIIIISSSSHHHHH!!


im going to order some Pr now...and then going to...u know...do stuff
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Old 02-16-2011, 02:56 AM #27
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Default Re: Anyone knows anything about a Pr3+ laser?

You people do realize that any emerging display technology using these will likely initially be very expensive, plus only have ONE (1) white light or one of each color laser right? They won't be like the projector scavenges where there are loads of lasers in one device. This will mean that most likely, the cost of said lasers will be in the thousands of dollars, since you only get one, or one set of each color, per device.

if the a1x0's only had 1 445nm in them instead of 24.. the cost for the hobbyist for them per diode would be about the same as the projector cost.. >$600, instead of the $35-$50 we have now.

I do think this is an awesome technology and the hobbyist community WILL get lasers out of things with them hitting the market.. I just doubt they'll ever be 'cheap' lasers.
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Old 02-16-2011, 03:30 AM #28
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Default Re: Anyone knows anything about a Pr3+ laser?

Ney Sayer! -GH
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Old 02-16-2011, 05:26 AM #29
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Default Re: Anyone knows anything about a Pr3+ laser?

1 diode per projector seems too less...unless it was like 30W or so of power...
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Old 02-16-2011, 06:31 AM #30
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Default Re: Anyone knows anything about a Pr3+ laser?

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1 diode per projector seems too less...unless it was like 30W or so of power...
How so? the pico projectors work without loads of diodes. I imagine most new devices will be scanning beam as well. That requires a lot less power than DLP, etc, which wastes a LOT of light.

Plus these aren't diodes we're talking about either. they're a new type of DPSS.. They're inherently going to be larger than diode lasers.
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Old 02-16-2011, 08:00 AM #31
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Default Re: Anyone knows anything about a Pr3+ laser?

^ Yes, but afaik, the more illuminating single-diodes picoprojector, actually, is around 120 lumens max total, not around 2500 / 3000 .....

If they had used a single 30W 445nm laser source, DPSS or not, you don't think it may worth also dismantle 600$ of projector, for get it in your hands ? .....
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Old 02-16-2011, 03:35 PM #32
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Join Date: Nov 2009
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Default Re: Anyone knows anything about a Pr3+ laser?

they will be much different (although i dont think that much different from our greenies) but in the way that they have lots of them...they just have to get the process cheap enough...

and they need power...and by what i read (might be misleading though) they havent had more than 40% efficiency for any line...only 40% for red, then i think its green and then the others...see a post i made above with the efficiencies...

so we would definetly need more than 1 diode per projector...or that or a bulky gigantic faser that would completely ruin a normal size projector (although it would look good on the mammoth sized ones )
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