Old 04-14-2012, 09:12 PM #1
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Default The Corning G-1000

Hey there! So, I received the two Directly doubled modules from RHD today.

One was already dead unfortunately. I tested it to the best of my powers and nothing came out... dissected it and well, now she is in DPSS heaven...


Back to reality and earth, the other one was still in the projector's diode sled thing...

I haven't bothered to take it out yet; I will soon enough though.

Getting down to it;

Driving the laser diode at around 222 mA; the heater is adjustable from 0 mA to 80 mA. The sweet spot is around the middle of that, roughly 40-50 mA.

Results:






Looks to be about as bright as 30 - 40 mW of normal DPSS green...

I also measured the operating voltage; At 222 mA, the operating voltage was only 1.62 volts!

So, I'm inputting only 0.35 watts... not including the heater.

Also realizing that the die itself has two die wires, I decided to push it a bit more... at 312 mA.

Results


Wow, we're getting visible in a moderately lit room...



Nice!

Measured the voltage again; got 1.7 volts at 312 mA.


I was feeling brave; decided one last time to push it up a little; to 416 mA. Measured the voltage to be 1.72 volts.

The results were stunning.

I apologize for the grainy picture.



Wow. I felt the little module; hardly warm at all... At this power, I could burn black things UNFOCUSED. This is also with the losses of like 3-4 different mirrors and optics inside the sled thing too.



So, I ask, should I try pushing it any more or should I stop? 1.7 volts is AMAZINGLY low for any IR diode, if I'm correct....

And a random note; where the DLP chip thing sits is a rather powerful magnet; I noticed it after the sled stuck to the 9 volt battery... which was rather nice, as it makes for a nice mount.


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Old 04-14-2012, 09:20 PM #2
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Default Re: The Corning G-1000

Wow - very cool!

I wouldn't push it. I would encourage you to keep it alive, and built something with it

This is actually rather unique in that it spectrometers at 530 instead of 532nm. And that's not just an "accuracy of the spectrometer issue", because I ran it next to other DPSS units. There's a very distinctly different wavelength coming out of this guy (of course, I ran it by just turning on the projector!).

At any rat,e I think it sort of qualifies as an "exotic wavelength"
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Old 04-14-2012, 09:58 PM #3
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Default Re: The Corning G-1000

I kinda want it :P
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Old 04-14-2012, 11:17 PM #4
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Default Re: The Corning G-1000

I took apart my ShoWWx projector, but quickly put it back
together.. Something about watching movies in laser light
that I could not justify gutting it

416mA seems like you may be getting close to the edge on this,
have you put this on a LPM to track its output?

I know on the projector, I see at most 50mW when projecting a solid
white image, and that the 3 colours combined. Given the 5,000hr life
rating, the most you may see out of that green is 75-100mW at its max.

If anything, i'd back the current off a bit if you want it to last..
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Old 04-14-2012, 11:22 PM #5
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Default Re: The Corning G-1000

Quote:
Originally Posted by wannaburn View Post
I took apart my ShoWWx projector, but quickly put it back
together.. Something about watching movies in laser light
that I could not justify gutting it

416mA seems like you may be getting close to the edge on this,
have you put this on a LPM to track its output?

I know on the projector, I see at most 50mW when projecting a solid
white image, and that the 3 colours combined. Given the 5,000hr life
rating, the most you may see out of that green is 75-100mW at its max.

If anything, i'd back the current off a bit if you want it to last..
Will do captain, regarding the lower current. Just wanted to see how bright I could get it.
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Old 04-14-2012, 11:25 PM #6
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Default Re: The Corning G-1000

So these are still DPSS green and not direct green diodes ? 530nm is rather strange wavelength for a dpss green.
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Old 04-14-2012, 11:26 PM #7
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Default Re: The Corning G-1000

Quote:
Originally Posted by Blord View Post
So these are still DPSS green and not direct green diodes ? 530nm is rather strange wavelength for a dpss green.
It's a special type; they're directly doubling 1060 nm IR, according to what I've read.
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Old 04-14-2012, 11:35 PM #8
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Default Re: The Corning G-1000

It's still frequency doubling, I believe with KTP. But there's no ND:Yag in it. In fact, there's no real pumping at all.

So it's not technically DPSS ("Diode Pumped Solid State"). But it's also not a direct green diode.

I think the best description is "Directly-Doubled-Diode". It's basically a 1060nm IR diode that is doubled, with the assistance of a heater to keep the IR wavelength stable.
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Old 04-14-2012, 11:52 PM #9
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Default Re: The Corning G-1000

DDSS might be better; Directly Doubled Solid State, just my opinion =). Very cool that you got it to work so well, aye, don't push it, preserve it!
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Old 04-14-2012, 11:55 PM #10
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Default Re: The Corning G-1000

I have read some interesting things about whats coming.. My hands on is based on whats
already available, so for me, there is much to learn.

All I can say is laser projection is moving in a great direction

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Old 04-15-2012, 12:19 AM #11
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Default Re: The Corning G-1000

33W 620nm red
35W 532nm green
28W 465nm blue

These are serious power output and exotic wavelength. Good time is coming
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Old 04-15-2012, 12:23 AM #12
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Default Re: The Corning G-1000

Quote:
Originally Posted by wannaburn View Post
I have read some interesting things about whats coming.. My hands on is based on whats
already available, so for me, there is much to learn.

All I can say is laser projection is moving in a great direction

What is that that we're looking at?
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Old 04-15-2012, 12:25 AM #13
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Default Re: The Corning G-1000

The kicker is the size of the package... These things are tiny

I dont have the PDF on hand, but the dimensions were mentioned as well as a comparrison
to a paper clip in size

I have no doubt these will be coming in a handheld. Question remains, how to power, and what the beam
profile will look like.


Quote:
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What is that that we're looking at?
Im assuming the light engine for the listed applications.
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Old 04-15-2012, 12:28 AM #14
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Default Re: The Corning G-1000

I'm still not clear on what that is though?

What's that from - what is that image?

Is it something from an academic journal?
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Old 04-15-2012, 12:34 AM #15
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Default Re: The Corning G-1000

This is from a PDF from a company which is manufacturing the TV's etc..
Though im not sure what has been produced so far, IIRC the document
is 2 years old.

Aside from the 620nm reference, the first seems on par with what is
in the pico projectors. Im not sure where TV's stand in comparison but
the powers listed seem reasonable.
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Old 04-15-2012, 12:38 AM #16
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Default Re: The Corning G-1000

Quote:
Originally Posted by wannaburn View Post
This is from a PDF from a company which is manufacturing the TV's etc..
Though im not sure what has been produced so far, IIRC the document
is 2 years old.

Aside from the 620nm reference, the first seems on par with what is
in the pico projectors. Im not sure where TV's stand in comparison but
the powers listed seem reasonable.
Then that was probably pre the widespread rollout of 445 diodes, as well as pre Mits 300/500s and talk of 8Ws.

I would suggest that this document is probably obsolete at this point. I can't see them going to frequency doubling to get 620nm light, when a couple companies have 8W 640nm arrays out there.
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