PPKTP CRYSTAL OPTIONS

We've acquired SPDC810 and hoped to make use of polarization-entangled photons initially. But It appears this unit does not have polarization-entangled photons. I'm wondering if you can update/modify our SPDC810 to really make it emit entangled photons.Illustration: Only one PPKTP crystal can be used inside of a quantum entanglement setup to make p