Abstract

Compact silicon integrated devices, such as micro-ring resonators, have recently been demonstrated as efficient sources of quantum correlated photon pairs [1,2]. The possibility of mass production of integrated devices requires the implementation of fast and reliable techniques to monitor the device performances. In the case of time-energy correlations, this is particularly challenging, as it requires the reconstruction of the biphoton wavefunction (BPW). This is even more demanding for micro-ring resonators, as the bandwidth of the generated photons is typically tens or hundreds of pm [3,4]. Here we show the reconstruction [5-7] of the Joint Spectral Density (JSD) of photons pairs generated by SFWM in a ring resonator by studying stimulated four wave mixing. We also show that this result can be used to discriminate between the generation of nearly-uncorrelated and highly-correlated photon pairs.

© 2015 IEEE