  This work marks an important progress towards practical quantum optical
technologies in the continuous variable regime, as it shows the feasibility of
experiments where non-Gaussian state generation entirely relies on plug-&-play
components from guided-wave optics technologies. This strategy is demonstrated
experimentally with the heralded preparation of low amplitude Schr\"odinger cat
states based on single-photon subtraction from a squeezed vacuum. All stages of
the experiment are based on off-the-shelf fiber components. This leads to a
stable, compact, and easily re-configurable realization, fully compatible with
existing fibre networks and, more in general, with future out-of-the-laboratory
applications.
