Re: SHG

Posted by Craig Brideau on
URL: http://confocal-microscopy-list.275.s1.nabble.com/Re-SHG-tp592071p592074.html

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I aligned the crystal and I got the blue beam and I block the 2p with
the filter.

Congratulations!  Welcome to the world of non-linear optics. @:-)

 

I didn't use any polarizer in the path.is it possible that
I am not getting the highest value and I should use the polarizer or
once I get the blue it means that my laser beam is polarized in the
same way of the crystal and I don't need to try waveplate?

Your laser's polarization is probably close enough to perpendicular that it won't matter.  If you have enough blue light power for your purposes then you can probably get away without the waveplate.  If it still seems low then try a waveplate, although they are expensive.  Typical conversion efficiencies for these crystals range from 20-40%.  If you are close to 20% or better then I wouldn't bother with the waveplate unless you don't have enough blue light for what you want to do.

Good luck!

Craig