切割超连续谱实现实时、高速全光量化

Real-Time and High-Speed All-Optical Quantization by Slicing Supercontinuum Spectrum

实验从时域上研究了切割超连续谱实现实时、高速全光量化的方案。利用光滤波器件对不同强度的光采样脉冲产生的超连续谱进行光谱分割,从而实现对光采样脉冲的实时量化。具体来讲,重复频率为10GHz的光采样脉冲经功率放大后耦合到400m的高非线性光纤中产生超连续谱,采用3个可调谐的光滤波器对其进行不同波长的光谱切割,实现采样率为10GSa/s、量化精度为2bit的实时全光量化,量化后脉冲时序的消光比可达10dB以上。

A real-time and high-speed all-optical quantization scheme by slicing supercontinuum spectrum is studied experimentally in time domain. The optical filters are used to slice the supercontinuum spectrum generated by different intensity optical sampling pulses, so as to realize the real-time quantization of the optical sampling pulses. Optical sampling pulses with the repetition rate of 10 GHz are coupled into a 400-m highly nonlinear fiber after power amplification to generate supercontinuum spectrum, which is sliced by three tunable optical filters at different wavelengths. Real-time all-optical quantization with sampling rate of 10 GSa/s and quantization accuracy of 2 bits is realized based on slicing supercontinuum spectrum, and the extinction ratio among the quantized outputs can reach up to more than 10 dB.