  We calculate the power spectrum of vacuum fluctuations of a generic scalar
field in a quantum cosmological setting that is manifestly singularity-free.
The power spectrum is given in terms of the usual scale invariant spectrum plus
scale dependent corrections. These are induced by well-defined quantum
fluctuations of de Sitter spacetime, resulting in a modified dispersion
relation for the scalar field. The leading correction turns out to be
proportional to the ratio of Hubble scale and Planck Mass. The maximal relative
change in the spectrum is on the ten percent level and might be observable with
future CMB experiments.
