- Feb 22, 2008
We were talking about that earlier on Discord, ~808nm is likely, but it's possible that the pump isn't 808nm too. We need someone with a spectrometer that goes to ~1µm to look at one of these and give us an idea of what's happening.It does "look" like a cheap 532nm laser. I agree with that. I doubt it is using a small 808nm diode for the pump. I would also like to know what they are using, but from what I can see, I can only guess at how they are doing it here.
Maybe I missed something but I didn't see anything in the pictures that indicated the orientation of the pump diode in relation to the xtal(s)?What's going on with that crystal, from what I've seen they are all at an oblique angle to what we normally see, is it possible a common KTP crystal is being used for direct doubling when put at some strange angle? I know, that's one hell of a stretch, but why am I seeing the crystals off the normal axis?
More info about pump diode:
It’s voltage is 1,5V and current 1A
So, most likely IR at around ~1W. 1.5V puts it low for 808nm, but it could be running at a lower current than rated for that specific diode.