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 22. High resolution single side band spectra given by the photon echo spectrum analyzer. The input RF signal contains 12 RF frequencies spanning a 20 MHz wide interval. (c) is a zoom on part of (a) and corresponds to 50 kHz resolution. (d) is a zoom on part of (b) and corresponds to 40 kHz resolution.