利用单光源光电振荡器实现多波长光脉冲与电时钟信号产生

Generation of Multi-Wavelength Optical Pulses and Electrical Clock Signal Utilizing Optoelectronic Oscillator with Single Light Source

提出了一种利用单光源光电振荡器(OEO)结构实现多波长光脉冲输出的方案。通过一个直调光源和光谱切片技术在OEO腔内可以产生不同中心波长的光脉冲和电时钟信号。腔内多个波长通道自然形成的多环路结构可以有效地抑制信号边模。在5 GHz频率的实验演示中,该系统产生了脉宽约10 ps,抖动1 ps的单波长脉冲、20 GHz(4×5 GHz)的时分复用脉冲与波/时分复用脉冲。所得到电时钟信号的相位噪声在频偏10 kHz处为-113 dBc/Hz,边模抑制比为100 dBc/Hz。

A scheme of generating multi-wavelength optical pulses based single light source optoelectronic oscillator （OEO） is proposed. By utilizing a directly modulated laser and spectral slicing technique, multi-wavelength optical pulses and electrical clock signal are generated in an OEO cavity. Multi-wavelength channels form a multi-loop configuration naturally, which can effectively suppress sidemodes. In demonstration, 10-ps-wide optical pulses at 5 GHz repetition rate are generated with 1 ps timing jitter, which can be arranged in 20 GHz （4 × 5 GHz） OTDM and time-/wavelength-interleaved optical pulse stream at different nodes. Along with the optical outputs, 5 GHz electrical signal with low phase noise （- 113 dBc/Hz at 10 kHz offset from the carrier） and -100 dBc/Hz spurious modes suppression is also obtained.