Dielectric resonator based synchronizer for multigigabit optical communications

This paper deals with clock recovery circuits for multigigabit communications. For these bit rates simplicity is a key parameter. Motivated by this, we consider an open-loop clock recovery circuit using a dielectric resonator (DR) and an unbalanced non-linearity (NL). We present a theoretical analysis of this circuit, using the one quadrant squarer as the NL and compare the results against the full wave squarer. and the absolute value NL. The theoretical analysis is extended by simulations which put in evidence the importance of non-stationary statistics in synchronization problems. Finally practical results are presented that confirm the viability of this type of circuits for bit rates above l0Gbit/s.