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ArcticMyst Security by Avery

Post your random pics!






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Stay safe buddy and thanks for the photos.
They look like they're straight out of a movie, amazing !
 
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Ever seen a laser diode's die while being powered on?
check this out! :D





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It's extremely hard to take those pics (at least for me) :mad:
LD: NUBM05
 
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I'll try to take a photos of LD of different wavelength, it is cool indeed :D

Tools needed:
1x $20 usb digital microscope
1x any diode under test
1x low power driver, which barely power up the diode at its threshold.
1x non shaky hand to hold the LD's module :D
1x non shaky hand to hold, move, and adjust the usb microscope :D
1x foot to click the mouse (to capture the pics from digital microscope) :crackup:

Yeah a bit of stupid approach, but it works lol
I could not use any holder because it will be harder to adjust the zoom/focus/movement on the fly
 

BowtieGuy

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Fantastic, whatever works. :yh:
I thought that those diodes must be at or near the threshold.
 
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Would be even cooler to put a filter on it and drive it hard enough to see a beam exiting, if that is possible.
 
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Very nicely done, astralist. Since the laser is at threshold, light is already exiting the die. Even before threshold light is exiting.
 
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That's very cool astralist, + 4U when it will let me. :beer:

I also thought that would be right at threshold, but I wonder about at a little higher current through a pair of orange laser safety glasses if the scope can focus through them and not on them, the scopes lights won't be needed so that may help, also a pic of the beam exiting the can window of a NDB7875 would be interesting to see, it would be fan shaped but tiny at the high intensity exit....this could also explain a lot of the overspray, I am now thinking about a diode face mask.

I would mount a diode against a large heat sink to draw heat out the back and try to get a pic from underneath if no can or a slightly reward angle if canned.

I am inspired to order a new scope, I do wonder if this is the reason for that shadow we see? Also the wide wash of overspray.
 
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@ Alaskan & RedCowBoy: That's a great idea! let see if i can shoot a beam exiting a diode's die or window :D




BTW here is another one, LD = LPC-840

ENJOY!!!


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BowtieGuy

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That is so cool looking, thanks for sharing your work with us! :yh:
 
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Nice Close ups : D ,

This was my attempt with a DSLR and a short FL lens taped on the front , Laser diode is a red C Mount rated at 500mW from what I remember .

Its very blurry and only focuses on the area the lights emitting from , it was just barely above lighting up and you can just about make out the bond wires .

P1010236 by TwirlyWhirly555, on Flickr
 
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Great job, astralist. You do seem to have a very steady hand. :D

I have used the LPC-840s a lot and have several in my stock. They have a great beam profile and divergence specs for a single mode direct diode. Seem to be good to 400 mW CW. Never ran one pulsed.
 
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