Rare earth ions embedded in crystals are natural high-quality-factor resonators that can be used for processing optically-carried broadband radio-frequency signals. This chapter focuses on the radio-frequency spectrum analysis function and describes different architectures that are designed to reach tens of gigahertz instantaneous bandwidth with… (More)
Figure 9. Detected spectrum for the non-collinear experiment. In (a) and (b), the engraved spectrum is represented by the rectangular curve. (a) The total diffracted field is detected. (b) A heterodyne detection permits to isolate the real part of the emitted field and to discard the dispersive part of the atomic response.