NDKTP Crystal for changing from 808nm(IR) to 535nm

Grix · Aug 2, 2010

laserboystuart said:
$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.

Prototype · Aug 2, 2010

Thread over a year old guys. He said they're a bonded set.

laserboystuart · Aug 3, 2010

Prototype said:
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.

stuart

blrock · Aug 5, 2010

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

mojo_1234 · Aug 14, 2010

CORRECT!

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

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...)...

mo

TTerbo · Aug 14, 2010

bobhaha is selling one of these in a HS for $20

Prototype · Aug 14, 2010

He is selling the crystal set from an Aixiz 50mW 532nm labby.

TTerbo · Aug 15, 2010

yeah but its the same sort of crystals

NDKTP Crystal for changing from 808nm(IR) to 535nm

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