  We study the radiation produced by an accelerated time-delay acting on the
left moving modes. Through analysis via the Schrodinger picture, we find that
the final state is a two-mode squeezed state of the left moving Unruh modes,
implying particle production. We analyse the system from an operational point
of view via the use of self-homodyne detection with broad-band inertial
detectors. We obtain semi-analytical solutions that show that the radiation
appears decohered when such an inertial observer analyses the information of
the radiation from the accelerated time-delay source. We make connection with
the case of the accelerated mirror. We investigate the operational conditions
under which the signal observed by the inertial observer can be purified.
