  Frequency entangled photon sources are in high demand in a variety of optical
quantum technologies, including quantum key distribution, cluster state quantum
computation and quantum metrology. In the recent decade, chip-scale entangled
photon sources have been developed using silicon platforms, offering
robustness, large scalability and CMOS technology compatibility. Here, we
report the generation of frequency correlated photon pairs using a 150-GHz
silicon nitride ring cavity. First, the device is characterized for studying
the phase matching condition during spontaneous four-wave mixing. Next, we
evaluate the joint spectrum intensity of the generated photons and confirm the
photon pair generation in a total of42 correlated frequency mode pairs,
corresponding to a bandwidth of 51.25 nm. Finally, the experimental results are
analyzed and the joint spectral intensity is quantified in terms of the phase
matching condition.
