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 5. (a) Example of spectrum obtained using the setup of Figure 4. The 10-GHz bandwidth readout is performed in 2 ms. 15 equally spaced tones have been engraved in the sample, except for a 5 MHz doublet, which is perfectly resolved as can be seen in (b).