GB: PL520 murder fund

What shall we do if the diode auto shut off in the test ? Some diodes have an overcurrent protection to prevent damage. It may work fine again when the current is tuned down.

Blord said:

What shall we do if the diode auto shut off in the test ? Some diodes have an overcurrent protection to prevent damage. It may work fine again when the current is tuned down.

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Never thought about that. If the diode lives I wouldn't know what to do, as it wouldn't be fair for me to keep it. I'm sure I'll find a way to abuse it until it's dead. I can freeze it to test the wavelengths at sub zero temperatures or I can heat it up to test the wavelength.

If this should happen maybe sell the diodes and donate the money to a world wide charity, or have a random draw with all the people who participated and the winner keeps the diode?
I think it will be very unlikely that this happens though, I don't think any laser diode can withstand the temperatures and currents I plan to throw at it :eg:

I imagine ARGlaser as this picture. "Welcome to the torture chamber" Poor diodes. :eg:

I like the random drawing idea!

ARGLaser said:

*snip* donate the money to a world wide charity *snip*

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You're talking about LPF right?

I really wonder how much of a blue shift you can make with cooling and whatnot. Then again, with heating, I wonder if we can get past 540nm :thinking:

Sent a donation

offroadfreak8582 said:

Sent a donation

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That's it, 153$ for diode #1 done. Funds will be send to Will when I get the go ahead from him.

I have updated the price on the second diode, as by the time we get funding for it DTR will probably have them in stock for 5$ cheaper.

ZRaffleticket said:

You're talking about LPF right?

I really wonder how much of a blue shift you can make with cooling and whatnot. Then again, with heating, I wonder if we can get past 540nm :thinking:

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I was thinking worldwide Redcross or WHO, something like that

Blord said:

I imagine ARGlaser as this picture. "Welcome to the torture chamber" Poor diodes. :eg:

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That's putting it lightly :eg:





All participants please read: I would like your feedback on the process I plan to take with the diode.

My plan is to get the power vs current plot first, up to the rated current on the datasheet. Then I plan to chill it, then heat it (not to the extremes) and take wavelength readings. I will also take one at room temperature.

After all that data I will check the current again and make sure it's still performing as intended and has not degraded in the above test. Then I will provide it with current past the data sheet to see the maximum power that is achievable. Some diodes pop suddenly and that's it, but some will dim without being damaged and then I can test the wavelength extremes to the diodes grave. :eg:

Question for the participants:
When doing the maximum current tests should I have the diode at room temperature (as in a handheld) or should I chill it with a TEC.
Chilling it will allow it to produce more power, so that we can better see the maximum output available and it may allow the diode to take more current before dimming/popping, but then then we will not know the maximum output available for a handheld.

My vote is to chill it and see the maximum power possible, but I will do whatever the popular vote is.

I'll jump in on that second diode, $20. PM me.

I say skip the chilled kill. It's probably more important to builders here what the room temp kills show.

(can you also ask if they have any leftover 505nm diodes?)

ZRaffleticket said:

I'll jump in on that second diode, $20. PM me.

I say skip the chilled kill. It's probably more important to builders here what the room temp kills show.

(can you also ask if they have any leftover 505nm diodes?)

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I'll PM you when we get close to the goal for the second diode.

Getting a spare 505nm diode would be sort of pointless in my opinion, it would be neat to see the wavelength peaks but if we do get one and get the data it would be useless if no one can acquire the diodes

DTR is going to stock these?

He has already put the diodes in the shop.

Link:
https://sites.google.com/site/dtrlpf/home/diodes/pl520-520nm-laser-diode

bloompyle said:

DTR is going to stock these?

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The more you know.

Anyone have an idea on lens for this?

bloompyle said:

The more you know.

Anyone have an idea on lens for this?

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The stock aixiz lens should be fine for this power, G lens' will also work.

ARGLaser said:

The stock aixiz lens should be fine for this power, G lens' will also work.

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I meant for best output. I don't use the stock aixiz lenses anymore, mostly because I just always happen to have a glass lens around somewhere. I feel that something optimized for 405 or green, perhaps argons, would work best if they can be miniaturized.

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