LITTLE KNOWN FACTS ABOUT PPKTP CRYSTAL.

We now have acquired SPDC810 and hoped to employ polarization-entangled photons initially. But it seems this device does not have polarization-entangled photons. I'm wondering if you could possibly update/modify our SPDC810 to really make it emit entangled photons.Example: An individual PPKTP crystal may be used in a very quantum entanglement set u