THE SMART TRICK OF PPKTP CRYSTAL THAT NO ONE IS DISCUSSING

We have now purchased SPDC810 and hoped to work with polarization-entangled photons at first. But It appears this device doesn't have polarization-entangled photons. I ponder if you could potentially update/modify our SPDC810 to make it emit entangled photons.with all development operators performing on precisely the same spatial mode due to collin