I am going to do an experiment for a class, which will be using type-II downconversion to entangle pairs of photons pumped from a laser diode. We're planning on using a camera to take pics of the rings that'd be formed, but we need to also measure/quantify our results somehow. The only possibility I've been able to find from research online is measuring coincidence counts for the photon pairs, but I don't see how that really provides any interesting/useful information, and I'd have to find someone to loan us their single photon detectors or whatever equipment would need to be used.
So my question is, how can the entanglement be measured? Can the quality of entanglement be quantified, and how? Or is there just anything measureable/testable that wouldn't be too hard or too inane?
Please help me, really any info at all helps! Thank you!!