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Old 08-02-2010, 10:35 PM #17
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Default Re: NDKTP Crystal for changing from 808nm(IR) to 535nm

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Originally Posted by laserboystuart View Post
$30!

i bet you they're just cheapy crystals pulled out of a 5mW pointer...

stuart
I agree.

What exactly is "NDKTP" crystals? Doped KTP? I have never heard of such a thing, and I get nothing when googling it either.
Maybe it's two crystals bonded together.



Last edited by Grix; 08-02-2010 at 10:39 PM.
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Old 08-02-2010, 10:49 PM #18
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Default Re: NDKTP Crystal for changing from 808nm(IR) to 535nm

Thread over a year old guys. He said they're a bonded set.
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Old 08-02-2010, 11:01 PM #19
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Default Re: NDKTP Crystal for changing from 808nm(IR) to 535nm

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Originally Posted by Prototype View Post
Thread over a year old guys. He said they're a bonded set.
still though... $30?!
you could pull the same crystals out of a $4 5mW pen...
bit of a rip IMO.

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Also, would a crap-load of evenly-wound aluminum duct tape work for heatsinking around the Aixiz module?
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Old 08-05-2010, 04:54 PM #20
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Default Re: NDKTP Crystal for changing from 808nm(IR) to 535nm

I agree. $30 is way too high. You can rip them out of cheap green laser pointers. And then you get a 808nm diode too.
The big question is are they optically bonded or glued? If they are optically bonded then it is a good price as 100+mw green would be achievable
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Old 08-14-2010, 01:07 PM #21
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Default Re: NDKTP Crystal for changing from 808nm(IR) to 535nm

CORRECT!

Just look at some cheap ebay modules - all the parts are just screwed together... no magic to disassemble

The module I've bought from ebay looks like this one:

50mW 532nm 3.0-3.7V /Laser Diode Module/Green Laser bei eBay.de: Lab Equipment (endet 20.08.10 05:29:51 MESZ)

And there's no trick at all to get a lot of green out of these "combo" crystals! No other optics - just put the crystal in front of the diode...

I've added some pictures made some months ago (and the 808nm wasn't proper focused...)...

NDKTP Crystal for changing from 808nm(IR) to 535nm-p1010742.jpg

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Attached Thumbnails
NDKTP Crystal for changing from 808nm(IR) to 535nm-p1010736.jpg   NDKTP Crystal for changing from 808nm(IR) to 535nm-p1010739.jpg   NDKTP Crystal for changing from 808nm(IR) to 535nm-p1010740.jpg   NDKTP Crystal for changing from 808nm(IR) to 535nm-p1010743.jpg   NDKTP Crystal for changing from 808nm(IR) to 535nm-p1010746.jpg  

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Old 08-14-2010, 01:16 PM #22
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Default Re: NDKTP Crystal for changing from 808nm(IR) to 535nm

bobhaha is selling one of these in a HS for $20
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Old 08-14-2010, 01:33 PM #23
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Default Re: NDKTP Crystal for changing from 808nm(IR) to 535nm

He is selling the crystal set from an Aixiz 50mW 532nm labby.
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Old 08-15-2010, 12:09 AM #24
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Default Re: NDKTP Crystal for changing from 808nm(IR) to 535nm

yeah but its the same sort of crystals
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