30 Gbps, broadly tunable, all-optical, clock recovery circuit

摘要

The ability to generate locally, a high quality optical clock signal from a jittered data stream, is necessary for the realization of ultra high capacity WDM/TDM transmission and all-optical processing systems [1, 2]. In particular clock recovery, is extremely important for the design and demonstration of relatively high functionality, multi-gate, ultra-high speed, all-optical digital logic circuits, as it may allow the synchronization of the optical signals between remote processing units. Optical clock recovery circuits have been demonstrated using a semiconductor optical amplifier (SOA) in an EDFA ring laser [3], the Kerr effect in optical fiber [4], a self-pulsating two section DFB laser diode [5, 6] and a figure of eight laser [7, 8].