  In the context of quantum integrated photonics, this work investigates the
quantum properties of light generated by silicon and silicon nitride
micro-resonators pumped in pulsed regime. The developed theoretical model,
performed in terms of the morphing supermodes, provides a comprehensive
description of the generated quantum states. Remarkably, it shows that a full
measurement of states carrying optimal squeezing levels is not accessible to
standard homodyne detection, thus leaving hidden part of generated quantum
features. By presenting and discussing this behaviour, as well as possible
strategies to amend it, this work proves itself essential to future quantum
applications exploiting micro-resonators as sources of multimode states.
