  In this article, we employ multimode radiation of a synchronously pumped
optical parametric oscillator (SPOPO) to build a cluster state through a
conversion on the base of quantum memory cell. We demonstrate that by choosing
an appropriate driving field we can ensure the effective writing of the only
one supermode from the entire set of the SPOPO squeezed supermodes. Further, by
changing the driving field profile at the readout, we convert the time profile
of the retrieved signal while maintaining its quantum state. We demonstrate the
possibilities of using the presented scheme by the example of creating a
four-mode linear cluster state of light.
