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FrozenGate by Avery

GB: 1W 520nm diode information/giveaway

bloompyle said:
I planned to use a couple large 400W (-60 to +180C). Though I've heard that these don't alter much once cooled.

So now the plan is to use a CPU LN2 system to cool an Al heatsink for a 638nm. They've hit 608nm at -191C.
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I second that, any other reading you can point us to about this magnitude of change in wavelength with cooling? I wonder what you could expect with a 638nm diode cooled to -80c? This is the temperature dry ice sublimates and should be attainable using a block of dry ice with a sink embedded partly into it. It would be pretty cool (no pun intended) to see what wavelength could be attained using simple dry ice to cool a diode.

Wouldn't be surprised at all if this has been tried before.
 





Spectrometer interface software was giving me a hard time, but it's all set up now.

Time to collect data :D
 
Planters from PL did this. From my phone, I can't get the video.

If you find his channel on PL, you'll also see a multiwatt 575nm dye, a cool DPSS, and some other neat work.

He's done there're cryo experiments. The only one worth a damn was using the P73 to get 608. The end of the video shows 2W of 608 going through a grating, hundreds of orange spot goodness.

It's like a half hour video, but worth watching. He documents the whole process from room temp, to -191C. Constant reading of wavelength, power, and input :)
 
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Not sure others would agree, but perhaps a long run (active cooled) at high current (2.6A maybe) to see if it can be pushed safely?

Not sure if you can take it outside easily but if you can I'd really like to know if the beam is visible on the daytime sky... I've asked this a couple times on different threads and no one that had the diode responded :P

BTW thanks for testing!
 
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Unfortunately I can't keep it actively cooled for that long, my cooling setup is inadequate for the 12W of heat it produces at that power.

I can test the diode in the daytime, but it's rainy and the cloud cover is making it dark, so I'll try again tomorrow :p
 
How does the beam/dot brightness compare to say, 3.5W of 445? How about 6W?(your old triple diode build)
 
I guess I can say I'm interested in knowing how it compares to 3.5W 445. That way I know what I'm getting into when these things drop in price :p

Or when i win...
 
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ZRaffleticket said:
I guess I can say I'm interested in knowing how it compares to 3.5W 445. That way I know what I'm getting into when these things drop in price :p

Or when i win...
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Same here. I believe DTR said it was much brighter than the brightest 445 he'd ever seen. I have a slightly difficult time believing that it's much brighter than 5W of 445, although Rick Trent would agree it's brighter
 
1.5W of green goodness! The question I have to ask is... How many new 3.5W put together are as bright as this 520 beast?! I saw in an earlier thread it would be close to 38W of 445
 
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I do suspect the green is brighter. 5W @445nm should not even be twice as bright as 3.5W @445

I want the power though
 
I've seen 1W of 532nm first hand. It is far brighter than the 2W 445 I had. The extra 1,5W of 445 will have little to no difference. I'd imagine the 1,5W 520 to be twice the brightness of the 6W 445.
 
bloompyle said:
I've seen 1W of 532nm first hand. It is far brighter than the 2W 445 I had. The extra 1,5W of 445 will have little to no difference. I'd imagine the 1,5W 520 to be twice the brightness of the 6W 445.
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Twice the brightness of 6w 445, that is, the same as 24W of 445? The beam must be visible from the f'in moon lol. Must be cool to see first hand
 
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kaunak said:
How does the beam/dot brightness compare to say, 3.5W of 445? How about 6W?(your old triple diode build)
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I don't have 3.5W of 445nm on hand, but 5W of 445nm is definitely brighter than 1.4W of 520nm.
 
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