Clock recovery of an injection-locked resonant tunneling diode microwave-photonics oscillator

摘要

We show experimental results of clock recovery from return-to-zero (RZ) format data by using injection locking of a free-running optoelectronic oscillator (OEO) circuit, which consists of a resonant tunneling diode (RTD) oscillator integrated circuit with both a detector and optical source. Error free extraction of a clock signal from the RTD-OEO is shown under both optical and electrical injection. The clock recovery performance at ∼1.25 Gb/s is analyzed in terms of timing jitter, phase noise and locking bandwidth.